./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm.c --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/array-fpi/nsqm.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:35:57,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:35:57,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:35:57,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:35:57,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:35:57,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:35:57,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:35:57,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:35:57,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:35:57,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:35:57,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:35:57,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:35:57,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:35:57,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:35:57,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:35:57,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:35:57,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:35:57,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:35:57,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:35:57,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:35:57,148 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:35:57,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:35:57,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:35:57,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:35:57,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:35:57,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:35:57,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:35:57,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:35:57,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:35:57,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:35:57,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:35:57,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:35:57,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:35:57,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:35:57,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:35:57,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:35:57,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:35:57,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:35:57,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:35:57,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:35:57,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:35:57,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:35:57,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:35:57,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:35:57,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:35:57,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:35:57,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:35:57,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:35:57,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:35:57,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:35:57,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:35:57,187 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:35:57,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:35:57,188 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:35:57,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:35:57,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:35:57,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:35:57,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:35:57,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:35:57,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:35:57,189 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:35:57,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:35:57,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:35:57,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:35:57,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:35:57,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:35:57,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:35:57,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:35:57,192 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:35:57,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:35:57,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:35:57,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2022-07-19 10:35:57,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:35:57,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:35:57,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:35:57,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:35:57,411 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:35:57,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2022-07-19 10:35:57,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717d607f3/59f74d70870d498f8064c9b9bbff414b/FLAGf6c7d855d [2022-07-19 10:35:57,814 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:35:57,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2022-07-19 10:35:57,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717d607f3/59f74d70870d498f8064c9b9bbff414b/FLAGf6c7d855d [2022-07-19 10:35:57,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717d607f3/59f74d70870d498f8064c9b9bbff414b [2022-07-19 10:35:57,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:35:57,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:35:57,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:35:57,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:35:57,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:35:57,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:35:57" (1/1) ... [2022-07-19 10:35:57,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225c0cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:57, skipping insertion in model container [2022-07-19 10:35:57,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:35:57" (1/1) ... [2022-07-19 10:35:57,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:35:57,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:35:57,986 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/array-fpi/nsqm.c[587,600] [2022-07-19 10:35:58,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:35:58,007 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:35:58,015 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/array-fpi/nsqm.c[587,600] [2022-07-19 10:35:58,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:35:58,033 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:35:58,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58 WrapperNode [2022-07-19 10:35:58,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:35:58,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:35:58,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:35:58,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:35:58,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,056 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-19 10:35:58,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:35:58,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:35:58,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:35:58,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:35:58,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:35:58,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:35:58,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:35:58,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:35:58,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (1/1) ... [2022-07-19 10:35:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:35:58,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:58,093 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) [2022-07-19 10:35:58,094 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 [2022-07-19 10:35:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:35:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:35:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:35:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:35:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:35:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:35:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:35:58,169 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:35:58,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:35:58,263 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:35:58,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:35:58,268 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:35:58,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:35:58 BoogieIcfgContainer [2022-07-19 10:35:58,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:35:58,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:35:58,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:35:58,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:35:58,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:35:57" (1/3) ... [2022-07-19 10:35:58,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767bc3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:35:58, skipping insertion in model container [2022-07-19 10:35:58,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:35:58" (2/3) ... [2022-07-19 10:35:58,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767bc3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:35:58, skipping insertion in model container [2022-07-19 10:35:58,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:35:58" (3/3) ... [2022-07-19 10:35:58,283 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2022-07-19 10:35:58,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:35:58,292 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:35:58,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:35:58,325 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@3db0c329, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58855811 [2022-07-19 10:35:58,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:35:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:35:58,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:58,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:58,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-19 10:35:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:58,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826859301] [2022-07-19 10:35:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:58,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826859301] [2022-07-19 10:35:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826859301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:58,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:35:58,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129107299] [2022-07-19 10:35:58,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:58,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:35:58,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:35:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:35:58,463 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:58,476 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-19 10:35:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:35:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:35:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:58,483 INFO L225 Difference]: With dead ends: 38 [2022-07-19 10:35:58,483 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 10:35:58,485 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 [2022-07-19 10:35:58,488 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-19 10:35:58,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:35:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 10:35:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 10:35:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 10:35:58,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-19 10:35:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:58,515 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 10:35:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 10:35:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 10:35:58,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:58,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:35:58,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-19 10:35:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381479039] [2022-07-19 10:35:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:58,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:58,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464982342] [2022-07-19 10:35:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:58,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:58,565 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) [2022-07-19 10:35:58,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:35:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 10:35:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:58,766 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-19 10:35:58,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-19 10:35:58,777 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 10 treesize of output 9 [2022-07-19 10:35:58,786 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 10 treesize of output 9 [2022-07-19 10:35:58,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-19 10:35:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:58,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:35:58,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:58,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381479039] [2022-07-19 10:35:58,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:58,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464982342] [2022-07-19 10:35:58,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464982342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:58,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:58,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:35:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390608924] [2022-07-19 10:35:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:58,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:35:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:35:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:35:58,981 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:59,067 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-19 10:35:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:35:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 10:35:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:59,069 INFO L225 Difference]: With dead ends: 34 [2022-07-19 10:35:59,070 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 10:35:59,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:35:59,072 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:59,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 10:35:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-19 10:35:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 10:35:59,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-19 10:35:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:59,079 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 10:35:59,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 10:35:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:35:59,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:59,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:59,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:59,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:59,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-07-19 10:35:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297090601] [2022-07-19 10:35:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:59,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:59,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768963289] [2022-07-19 10:35:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:59,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:59,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:59,337 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) [2022-07-19 10:35:59,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:35:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:35:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:59,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:35:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:59,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297090601] [2022-07-19 10:35:59,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768963289] [2022-07-19 10:35:59,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768963289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:35:59,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:35:59,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:35:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109998324] [2022-07-19 10:35:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:35:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:35:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:35:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:35:59,403 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:59,463 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-19 10:35:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:35:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:35:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:59,465 INFO L225 Difference]: With dead ends: 49 [2022-07-19 10:35:59,465 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 10:35:59,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:35:59,468 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:59,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:35:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 10:35:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-07-19 10:35:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-19 10:35:59,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-19 10:35:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:59,478 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-19 10:35:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-19 10:35:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:35:59,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:59,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:59,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:35:59,687 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,SelfDestructingSolverStorable2 [2022-07-19 10:35:59,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:35:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:35:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-19 10:35:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:35:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431343584] [2022-07-19 10:35:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:59,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:35:59,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:35:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234278693] [2022-07-19 10:35:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:35:59,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:35:59,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:35:59,723 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) [2022-07-19 10:35:59,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:35:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:35:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:35:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:35:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:59,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:35:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:35:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:35:59,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431343584] [2022-07-19 10:35:59,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:35:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234278693] [2022-07-19 10:35:59,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234278693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:35:59,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:35:59,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-19 10:35:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239504450] [2022-07-19 10:35:59,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:35:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:35:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:35:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:35:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:35:59,808 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:35:59,888 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-19 10:35:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:35:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:35:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:35:59,890 INFO L225 Difference]: With dead ends: 44 [2022-07-19 10:35:59,890 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:35:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:35:59,893 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:35:59,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:35:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:35:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-19 10:35:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:35:59,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-19 10:35:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:35:59,896 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:35:59,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:35:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:35:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:35:59,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:35:59,897 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:35:59,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:00,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:00,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-07-19 10:36:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:00,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65021910] [2022-07-19 10:36:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:00,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:00,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:00,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552365063] [2022-07-19 10:36:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:00,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:00,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:00,113 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) [2022-07-19 10:36:00,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:36:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:36:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:36:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:00,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:36:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65021910] [2022-07-19 10:36:00,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:00,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552365063] [2022-07-19 10:36:00,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552365063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:36:00,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:36:00,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:36:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109381872] [2022-07-19 10:36:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:36:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:36:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:36:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:36:00,215 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:00,286 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-19 10:36:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:36:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:36:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:00,287 INFO L225 Difference]: With dead ends: 41 [2022-07-19 10:36:00,287 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 10:36:00,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:36:00,288 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:00,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:36:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 10:36:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-19 10:36:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-19 10:36:00,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-07-19 10:36:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:00,290 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-19 10:36:00,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-19 10:36:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:36:00,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:00,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:00,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:00,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:00,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-19 10:36:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:00,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96877406] [2022-07-19 10:36:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:00,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745164434] [2022-07-19 10:36:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:00,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:00,522 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) [2022-07-19 10:36:00,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:36:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:36:00,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 10:36:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:00,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:36:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:00,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 16 [2022-07-19 10:36:00,607 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 10 treesize of output 9 [2022-07-19 10:36:00,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:00,649 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-19 10:36:00,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:36:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:00,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:00,814 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-07-19 10:36:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 10:36:00,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96877406] [2022-07-19 10:36:00,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745164434] [2022-07-19 10:36:00,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745164434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:00,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:00,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 10:36:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808918733] [2022-07-19 10:36:00,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:00,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:36:00,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:36:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2022-07-19 10:36:00,829 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:14,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-19 10:36:25,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-19 10:36:37,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-19 10:36:48,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-19 10:36:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:48,675 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-07-19 10:36:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:36:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 10:36:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:48,688 INFO L225 Difference]: With dead ends: 29 [2022-07-19 10:36:48,688 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 10:36:48,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2022-07-19 10:36:48,688 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:48,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 4 Unknown, 28 Unchecked, 47.8s Time] [2022-07-19 10:36:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 10:36:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-19 10:36:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-19 10:36:48,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2022-07-19 10:36:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:48,691 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-19 10:36:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-19 10:36:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:36:48,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:48,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:48,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:48,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-07-19 10:36:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606695977] [2022-07-19 10:36:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:48,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:48,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724042302] [2022-07-19 10:36:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:36:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:48,915 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) [2022-07-19 10:36:48,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:36:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:36:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:36:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606695977] [2022-07-19 10:36:49,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724042302] [2022-07-19 10:36:49,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724042302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:49,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:49,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:36:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647675872] [2022-07-19 10:36:49,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:49,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:36:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:36:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:36:49,020 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:49,119 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-07-19 10:36:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:36:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 10:36:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:49,120 INFO L225 Difference]: With dead ends: 60 [2022-07-19 10:36:49,120 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 10:36:49,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:36:49,121 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:49,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 46 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:36:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 10:36:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-19 10:36:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 10:36:49,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-07-19 10:36:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:49,125 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 10:36:49,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 10:36:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:36:49,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:49,126 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:49,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:49,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-19 10:36:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396626131] [2022-07-19 10:36:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:49,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064849829] [2022-07-19 10:36:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:49,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:49,371 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) [2022-07-19 10:36:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:36:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:36:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 10:36:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:49,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:36:49,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:49,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-19 10:36:49,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-19 10:36:49,466 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 10 treesize of output 9 [2022-07-19 10:36:49,469 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 8 treesize of output 7 [2022-07-19 10:36:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:49,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 10:36:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:49,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-07-19 10:36:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:49,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:50,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:50,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396626131] [2022-07-19 10:36:50,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:50,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064849829] [2022-07-19 10:36:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064849829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:50,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:50,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-07-19 10:36:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128727831] [2022-07-19 10:36:50,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:50,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:36:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:36:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:36:50,011 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:50,144 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-19 10:36:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:36:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:36:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:50,145 INFO L225 Difference]: With dead ends: 39 [2022-07-19 10:36:50,145 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:36:50,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:36:50,146 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2022-07-19 10:36:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:36:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-19 10:36:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-19 10:36:50,157 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-07-19 10:36:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:50,157 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-19 10:36:50,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-19 10:36:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:36:50,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:50,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:50,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:50,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-19 10:36:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459614271] [2022-07-19 10:36:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:50,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:50,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870622864] [2022-07-19 10:36:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:36:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:50,401 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) [2022-07-19 10:36:50,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:36:50,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:36:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 10:36:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:50,571 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-19 10:36:50,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-19 10:36:50,577 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 10 treesize of output 9 [2022-07-19 10:36:50,583 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 10 treesize of output 9 [2022-07-19 10:36:50,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2022-07-19 10:36:50,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-19 10:36:50,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:36:50,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:50,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:50,721 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-19 10:36:50,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:36:50,753 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-19 10:36:50,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:36:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:50,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459614271] [2022-07-19 10:36:51,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870622864] [2022-07-19 10:36:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870622864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:51,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:51,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2022-07-19 10:36:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834232863] [2022-07-19 10:36:51,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 10:36:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 10:36:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-07-19 10:36:51,162 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:51,511 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-07-19 10:36:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 10:36:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:36:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:51,512 INFO L225 Difference]: With dead ends: 90 [2022-07-19 10:36:51,512 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 10:36:51,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=897, Unknown=3, NotChecked=0, Total=1190 [2022-07-19 10:36:51,513 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:51,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 109 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 138 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-07-19 10:36:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 10:36:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2022-07-19 10:36:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-19 10:36:51,519 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 20 [2022-07-19 10:36:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:51,519 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-19 10:36:51,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-19 10:36:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:36:51,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:51,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:51,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:51,731 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,SelfDestructingSolverStorable8 [2022-07-19 10:36:51,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 2 times [2022-07-19 10:36:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510183810] [2022-07-19 10:36:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:51,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:51,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:51,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376253876] [2022-07-19 10:36:51,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:36:51,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:51,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:51,765 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) [2022-07-19 10:36:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:36:51,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:36:51,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:36:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:36:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:36:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510183810] [2022-07-19 10:36:51,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376253876] [2022-07-19 10:36:51,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376253876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:51,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:51,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-19 10:36:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971817729] [2022-07-19 10:36:51,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:51,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:36:51,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:36:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:36:51,884 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:51,994 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-07-19 10:36:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:36:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:36:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:51,995 INFO L225 Difference]: With dead ends: 77 [2022-07-19 10:36:51,995 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 10:36:51,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:36:51,996 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:51,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 76 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:36:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 10:36:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2022-07-19 10:36:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-19 10:36:52,001 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 22 [2022-07-19 10:36:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:52,001 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-19 10:36:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-19 10:36:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:36:52,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:52,002 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:52,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 10:36:52,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 3 times [2022-07-19 10:36:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248122254] [2022-07-19 10:36:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:52,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:52,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107927072] [2022-07-19 10:36:52,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:36:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:52,237 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) [2022-07-19 10:36:52,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:36:52,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:36:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:36:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:36:52,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:36:52,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:52,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248122254] [2022-07-19 10:36:52,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:52,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107927072] [2022-07-19 10:36:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107927072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:52,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-19 10:36:52,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073764575] [2022-07-19 10:36:52,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:52,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:36:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:36:52,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:36:52,396 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:52,494 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-07-19 10:36:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:36:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:36:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:52,495 INFO L225 Difference]: With dead ends: 71 [2022-07-19 10:36:52,495 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 10:36:52,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:36:52,496 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:52,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:36:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 10:36:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-07-19 10:36:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-19 10:36:52,500 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2022-07-19 10:36:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:52,500 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-19 10:36:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-19 10:36:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:36:52,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:52,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:52,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:52,718 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,SelfDestructingSolverStorable10 [2022-07-19 10:36:52,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 4 times [2022-07-19 10:36:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:52,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082282005] [2022-07-19 10:36:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:52,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:52,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898351285] [2022-07-19 10:36:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:36:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:52,732 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) [2022-07-19 10:36:52,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:36:52,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:36:52,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 10:36:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:52,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:36:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:52,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-19 10:36:52,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-19 10:36:52,920 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 10 treesize of output 9 [2022-07-19 10:36:52,923 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 8 treesize of output 7 [2022-07-19 10:36:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:52,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-19 10:36:53,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 10:36:53,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 131 [2022-07-19 10:36:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:36:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 198 [2022-07-19 10:36:53,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 10:36:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:53,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-07-19 10:36:53,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 30 [2022-07-19 10:36:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:53,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:55,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082282005] [2022-07-19 10:36:55,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898351285] [2022-07-19 10:36:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898351285] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:55,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2022-07-19 10:36:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169560455] [2022-07-19 10:36:55,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:36:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:36:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:36:55,254 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:55,592 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-19 10:36:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:36:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:36:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:55,593 INFO L225 Difference]: With dead ends: 61 [2022-07-19 10:36:55,593 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 10:36:55,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:36:55,594 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:55,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-07-19 10:36:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 10:36:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-07-19 10:36:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-19 10:36:55,604 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 24 [2022-07-19 10:36:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:55,605 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-19 10:36:55,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-19 10:36:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:36:55,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:55,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:55,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:55,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 10:36:55,815 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2022-07-19 10:36:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305731737] [2022-07-19 10:36:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:55,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:55,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916886932] [2022-07-19 10:36:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:36:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:55,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:36:55,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:36:56,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:36:56,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:36:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 10:36:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:36:56,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:36:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:56,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 16 [2022-07-19 10:36:56,193 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 10 treesize of output 9 [2022-07-19 10:36:56,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:56,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:56,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 16 treesize of output 18 [2022-07-19 10:36:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:56,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 27 treesize of output 26 [2022-07-19 10:36:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:56,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 27 treesize of output 26 [2022-07-19 10:36:56,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:36:56,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2022-07-19 10:36:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:36:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:36:56,858 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_445 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_445) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-07-19 10:36:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-07-19 10:36:56,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:36:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305731737] [2022-07-19 10:36:56,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:36:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916886932] [2022-07-19 10:36:56,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916886932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:36:56,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:36:56,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-19 10:36:56,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076356915] [2022-07-19 10:36:56,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:36:56,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 10:36:56,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:36:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 10:36:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=215, Unknown=1, NotChecked=32, Total=342 [2022-07-19 10:36:56,873 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:36:57,245 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-07-19 10:36:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:36:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 10:36:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:36:57,246 INFO L225 Difference]: With dead ends: 140 [2022-07-19 10:36:57,246 INFO L226 Difference]: Without dead ends: 138 [2022-07-19 10:36:57,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=602, Unknown=1, NotChecked=54, Total=870 [2022-07-19 10:36:57,248 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 199 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:36:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 142 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-07-19 10:36:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-19 10:36:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 57. [2022-07-19 10:36:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-07-19 10:36:57,254 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 24 [2022-07-19 10:36:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:36:57,254 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-07-19 10:36:57,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:36:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-07-19 10:36:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:36:57,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:36:57,255 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:36:57,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:36:57,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 10:36:57,472 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:36:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:36:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2022-07-19 10:36:57,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:36:57,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969419918] [2022-07-19 10:36:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:36:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:36:57,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:36:57,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536645707] [2022-07-19 10:36:57,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:36:57,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:36:57,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:36:57,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:36:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:37:04,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 10:37:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 10:37:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:04,328 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-19 10:37:04,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-07-19 10:37:04,355 INFO L356 Elim1Store]: treesize reduction 39, result has 31.6 percent of original size [2022-07-19 10:37:04,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 75 [2022-07-19 10:37:04,360 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 10 treesize of output 9 [2022-07-19 10:37:04,373 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 10 treesize of output 9 [2022-07-19 10:37:04,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-19 10:37:04,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-19 10:37:04,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 55 [2022-07-19 10:37:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:04,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 48 [2022-07-19 10:37:04,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-19 10:37:04,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:37:04,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2022-07-19 10:37:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-19 10:37:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 37 [2022-07-19 10:37:04,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 46 [2022-07-19 10:37:04,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 165 [2022-07-19 10:37:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2022-07-19 10:37:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 120 [2022-07-19 10:37:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:04,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:04,860 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:37:04,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 62 [2022-07-19 10:37:05,110 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-19 10:37:05,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 45 [2022-07-19 10:37:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:05,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:13,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969419918] [2022-07-19 10:37:13,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:13,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536645707] [2022-07-19 10:37:13,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536645707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:13,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:13,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-19 10:37:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187832306] [2022-07-19 10:37:13,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:37:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:37:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:37:13,096 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:15,549 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-07-19 10:37:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 10:37:15,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:37:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:15,551 INFO L225 Difference]: With dead ends: 86 [2022-07-19 10:37:15,551 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 10:37:15,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 10:37:15,552 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:15,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 98 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 134 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-07-19 10:37:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 10:37:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2022-07-19 10:37:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-07-19 10:37:15,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 28 [2022-07-19 10:37:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:15,561 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-07-19 10:37:15,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-07-19 10:37:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:37:15,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:15,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:15,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 10:37:15,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1412338184, now seen corresponding path program 6 times [2022-07-19 10:37:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575383631] [2022-07-19 10:37:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:15,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878889657] [2022-07-19 10:37:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:37:15,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:15,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:15,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:37:15,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:37:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:37:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:37:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:37:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:37:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:16,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575383631] [2022-07-19 10:37:16,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878889657] [2022-07-19 10:37:16,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878889657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:16,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:16,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-19 10:37:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898370060] [2022-07-19 10:37:16,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:37:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:16,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:37:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:37:16,028 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:16,165 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2022-07-19 10:37:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:37:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:37:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:16,166 INFO L225 Difference]: With dead ends: 126 [2022-07-19 10:37:16,166 INFO L226 Difference]: Without dead ends: 92 [2022-07-19 10:37:16,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:37:16,167 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:16,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 71 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:37:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-19 10:37:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2022-07-19 10:37:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-07-19 10:37:16,173 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 28 [2022-07-19 10:37:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:16,174 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-07-19 10:37:16,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-07-19 10:37:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:37:16,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:16,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:16,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:16,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 7 times [2022-07-19 10:37:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40455843] [2022-07-19 10:37:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:16,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:16,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:16,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889266811] [2022-07-19 10:37:16,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:37:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:16,394 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:16,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 10:37:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:37:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 10:37:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:37:16,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:37:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-07-19 10:37:16,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-07-19 10:37:16,841 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 10 treesize of output 9 [2022-07-19 10:37:16,844 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 8 treesize of output 7 [2022-07-19 10:37:16,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2022-07-19 10:37:16,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:16,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-19 10:37:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:16,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2022-07-19 10:37:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-19 10:37:17,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 146 [2022-07-19 10:37:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:37:17,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 198 [2022-07-19 10:37:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 60 [2022-07-19 10:37:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-07-19 10:37:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:37:17,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 64 [2022-07-19 10:37:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:17,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:37:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:37:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:37:37,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40455843] [2022-07-19 10:37:37,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 10:37:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889266811] [2022-07-19 10:37:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889266811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:37:37,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:37:37,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2022-07-19 10:37:37,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216885521] [2022-07-19 10:37:37,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:37:37,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 10:37:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:37:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 10:37:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=575, Unknown=6, NotChecked=0, Total=702 [2022-07-19 10:37:37,435 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:37:40,168 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-07-19 10:37:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 10:37:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:37:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:37:40,168 INFO L225 Difference]: With dead ends: 93 [2022-07-19 10:37:40,168 INFO L226 Difference]: Without dead ends: 91 [2022-07-19 10:37:40,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=201, Invalid=983, Unknown=6, NotChecked=0, Total=1190 [2022-07-19 10:37:40,169 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:37:40,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-07-19 10:37:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-19 10:37:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2022-07-19 10:37:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-07-19 10:37:40,177 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 28 [2022-07-19 10:37:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:37:40,178 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-07-19 10:37:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:37:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-07-19 10:37:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:37:40,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:37:40,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:37:40,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:37:40,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 10:37:40,379 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:37:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:37:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash -184451956, now seen corresponding path program 5 times [2022-07-19 10:37:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:37:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729156018] [2022-07-19 10:37:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:37:40,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:37:40,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 10:37:40,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228073837] [2022-07-19 10:37:40,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:37:40,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:37:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:37:40,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:37:40,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process