./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.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/nla-digbench-scaling/fermat1-ll_unwindbound100.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 ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:53:06,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:53:06,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:53:06,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:53:06,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:53:06,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:53:06,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:53:06,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:53:06,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:53:06,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:53:06,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:53:07,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:53:07,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:53:07,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:53:07,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:53:07,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:53:07,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:53:07,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:53:07,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:53:07,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:53:07,019 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:53:07,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:53:07,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:53:07,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:53:07,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:53:07,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:53:07,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:53:07,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:53:07,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:53:07,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:53:07,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:53:07,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:53:07,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:53:07,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:53:07,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:53:07,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:53:07,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:53:07,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:53:07,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:53:07,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:53:07,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:53:07,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:53:07,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:53:07,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:53:07,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:53:07,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:53:07,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:53:07,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:53:07,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:53:07,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:53:07,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:53:07,075 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:53:07,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:53:07,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:53:07,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:53:07,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:53:07,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:53:07,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:53:07,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:53:07,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:53:07,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:53:07,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:53:07,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:53:07,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:53:07,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:53:07,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:53:07,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:53:07,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:53:07,082 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:53:07,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:53:07,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:53:07,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d [2022-07-19 15:53:07,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:53:07,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:53:07,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:53:07,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:53:07,307 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:53:07,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-07-19 15:53:07,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc89d9eae/4ca3b7b359a74cb08029dff0cf69bfe6/FLAGe6e92e044 [2022-07-19 15:53:07,742 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:53:07,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2022-07-19 15:53:07,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc89d9eae/4ca3b7b359a74cb08029dff0cf69bfe6/FLAGe6e92e044 [2022-07-19 15:53:07,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc89d9eae/4ca3b7b359a74cb08029dff0cf69bfe6 [2022-07-19 15:53:07,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:53:07,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:53:07,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:53:07,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:53:07,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:53:07,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:53:07" (1/1) ... [2022-07-19 15:53:07,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439d0702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:07, skipping insertion in model container [2022-07-19 15:53:07,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:53:07" (1/1) ... [2022-07-19 15:53:07,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:53:07,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:53:07,959 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/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2022-07-19 15:53:07,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:53:07,994 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:53:08,007 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/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2022-07-19 15:53:08,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:53:08,035 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:53:08,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08 WrapperNode [2022-07-19 15:53:08,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:53:08,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:53:08,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:53:08,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:53:08,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,063 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-19 15:53:08,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:53:08,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:53:08,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:53:08,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:53:08,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:53:08,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:53:08,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:53:08,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:53:08,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (1/1) ... [2022-07-19 15:53:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:53:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:08,125 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 15:53:08,126 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 15:53:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:53:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:53:08,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:53:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:53:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:53:08,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:53:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:53:08,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:53:08,208 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:53:08,210 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:53:08,349 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:53:08,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:53:08,353 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 15:53:08,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:53:08 BoogieIcfgContainer [2022-07-19 15:53:08,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:53:08,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:53:08,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:53:08,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:53:08,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:53:07" (1/3) ... [2022-07-19 15:53:08,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24edc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:53:08, skipping insertion in model container [2022-07-19 15:53:08,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:08" (2/3) ... [2022-07-19 15:53:08,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c24edc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:53:08, skipping insertion in model container [2022-07-19 15:53:08,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:53:08" (3/3) ... [2022-07-19 15:53:08,361 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2022-07-19 15:53:08,374 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:53:08,374 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:53:08,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:53:08,416 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@6bd98124, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@505488ab [2022-07-19 15:53:08,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:53:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:53:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:53:08,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:08,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:08,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-07-19 15:53:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861393875] [2022-07-19 15:53:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:08,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:08,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817972131] [2022-07-19 15:53:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:08,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:08,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:08,529 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 15:53:08,530 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 15:53:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 15:53:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:53:08,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:08,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861393875] [2022-07-19 15:53:08,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817972131] [2022-07-19 15:53:08,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817972131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:08,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:08,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:53:08,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714777987] [2022-07-19 15:53:08,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:53:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:53:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:53:08,667 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:53:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:08,682 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-07-19 15:53:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:53:08,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 15:53:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:08,689 INFO L225 Difference]: With dead ends: 61 [2022-07-19 15:53:08,689 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 15:53:08,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:53:08,695 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:08,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 15:53:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 15:53:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-19 15:53:08,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-07-19 15:53:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:08,723 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-19 15:53:08,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:53:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-19 15:53:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:53:08,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:08,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:08,747 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 15:53:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 15:53:08,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-07-19 15:53:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926302265] [2022-07-19 15:53:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:08,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121329302] [2022-07-19 15:53:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:08,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:08,968 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 15:53:08,970 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 15:53:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:53:09,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:09,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:09,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926302265] [2022-07-19 15:53:09,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121329302] [2022-07-19 15:53:09,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121329302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:09,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:09,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:53:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97168227] [2022-07-19 15:53:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:53:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:53:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:09,097 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:53:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:09,115 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-19 15:53:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:53:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:53:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:09,120 INFO L225 Difference]: With dead ends: 37 [2022-07-19 15:53:09,120 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 15:53:09,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:09,122 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:09,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 15:53:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 15:53:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-19 15:53:09,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-07-19 15:53:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:09,134 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-19 15:53:09,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:53:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-19 15:53:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:53:09,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:09,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:09,160 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 15:53:09,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 15:53:09,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:09,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-07-19 15:53:09,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:09,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610972739] [2022-07-19 15:53:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:09,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:09,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:09,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032493130] [2022-07-19 15:53:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:09,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:09,377 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 15:53:09,421 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 15:53:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:53:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:09,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610972739] [2022-07-19 15:53:09,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032493130] [2022-07-19 15:53:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032493130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:09,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:09,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:53:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133995544] [2022-07-19 15:53:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:53:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:53:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:09,741 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:53:10,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:13,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:16,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:16,105 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-07-19 15:53:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:53:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:16,107 INFO L225 Difference]: With dead ends: 49 [2022-07-19 15:53:16,107 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 15:53:16,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:53:16,108 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-07-19 15:53:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 15:53:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-19 15:53:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 15:53:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-19 15:53:16,119 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-07-19 15:53:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:16,119 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-19 15:53:16,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:53:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-19 15:53:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:53:16,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:16,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:16,146 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 15:53:16,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:16,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:16,345 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-07-19 15:53:16,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:16,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544752220] [2022-07-19 15:53:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:16,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:16,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53162367] [2022-07-19 15:53:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:16,357 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 15:53:16,360 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 15:53:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:16,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:53:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544752220] [2022-07-19 15:53:16,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53162367] [2022-07-19 15:53:16,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53162367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:16,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:16,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-19 15:53:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615069252] [2022-07-19 15:53:16,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:53:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:53:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:16,569 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 15:53:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:16,773 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-07-19 15:53:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:53:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-07-19 15:53:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:16,776 INFO L225 Difference]: With dead ends: 53 [2022-07-19 15:53:16,776 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 15:53:16,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:53:16,778 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:16,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:53:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 15:53:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-07-19 15:53:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-19 15:53:16,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-07-19 15:53:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:16,786 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-19 15:53:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 15:53:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-19 15:53:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:53:16,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:16,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:16,810 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 15:53:17,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-07-19 15:53:17,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:17,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849533619] [2022-07-19 15:53:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:17,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273669719] [2022-07-19 15:53:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:17,019 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 15:53:17,023 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 15:53:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:53:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:17,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849533619] [2022-07-19 15:53:17,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273669719] [2022-07-19 15:53:17,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273669719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:17,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:17,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:53:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533567686] [2022-07-19 15:53:17,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:17,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:53:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:53:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:17,136 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:53:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:17,169 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-19 15:53:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:17,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-19 15:53:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:17,171 INFO L225 Difference]: With dead ends: 61 [2022-07-19 15:53:17,171 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 15:53:17,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:17,176 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:17,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 15:53:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-19 15:53:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:53:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-07-19 15:53:17,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-07-19 15:53:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:17,195 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-07-19 15:53:17,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:53:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-07-19 15:53:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:53:17,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:17,198 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:17,223 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 15:53:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-07-19 15:53:17,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:17,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343291617] [2022-07-19 15:53:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:17,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:17,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645834904] [2022-07-19 15:53:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:17,425 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 15:53:17,426 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 15:53:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:53:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:17,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:53:17,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:17,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343291617] [2022-07-19 15:53:17,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:17,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645834904] [2022-07-19 15:53:17,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645834904] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:53:17,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:53:17,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-07-19 15:53:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971246679] [2022-07-19 15:53:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:53:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:53:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:17,572 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:53:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:17,605 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-19 15:53:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:53:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-19 15:53:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:17,606 INFO L225 Difference]: With dead ends: 70 [2022-07-19 15:53:17,606 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 15:53:17,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:17,608 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:17,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 15:53:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-19 15:53:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 15:53:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-19 15:53:17,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-07-19 15:53:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:17,617 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-19 15:53:17,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:53:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-19 15:53:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:53:17,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:17,619 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:17,643 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 15:53:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-07-19 15:53:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984745581] [2022-07-19 15:53:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:17,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:17,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686891697] [2022-07-19 15:53:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:17,854 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 15:53:17,873 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 15:53:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:53:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:17,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:53:18,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:18,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984745581] [2022-07-19 15:53:18,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:18,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686891697] [2022-07-19 15:53:18,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686891697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:18,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:18,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-19 15:53:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774191513] [2022-07-19 15:53:18,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:53:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:53:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:18,024 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 15:53:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:18,167 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-07-19 15:53:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:53:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-07-19 15:53:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:18,170 INFO L225 Difference]: With dead ends: 125 [2022-07-19 15:53:18,170 INFO L226 Difference]: Without dead ends: 104 [2022-07-19 15:53:18,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:53:18,172 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:18,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:53:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-19 15:53:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-07-19 15:53:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 15:53:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-07-19 15:53:18,205 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-07-19 15:53:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:18,206 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-07-19 15:53:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 15:53:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-07-19 15:53:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:53:18,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:18,209 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:18,236 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 15:53:18,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:18,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-07-19 15:53:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:18,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874886967] [2022-07-19 15:53:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:18,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:18,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732775095] [2022-07-19 15:53:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:18,434 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 15:53:18,435 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 15:53:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:53:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:53:18,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:18,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874886967] [2022-07-19 15:53:18,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732775095] [2022-07-19 15:53:18,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732775095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:18,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:18,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:53:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133466511] [2022-07-19 15:53:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:18,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:53:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:53:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:18,505 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 15:53:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:18,545 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-07-19 15:53:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:53:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-07-19 15:53:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:18,548 INFO L225 Difference]: With dead ends: 154 [2022-07-19 15:53:18,548 INFO L226 Difference]: Without dead ends: 115 [2022-07-19 15:53:18,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:18,550 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:18,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 86 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-19 15:53:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-07-19 15:53:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 15:53:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-07-19 15:53:18,586 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-07-19 15:53:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:18,586 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-07-19 15:53:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 15:53:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-07-19 15:53:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:53:18,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:18,592 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:18,617 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 15:53:18,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 15:53:18,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-07-19 15:53:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:18,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126353229] [2022-07-19 15:53:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:18,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:18,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:18,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687453431] [2022-07-19 15:53:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:18,832 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 15:53:18,866 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 15:53:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:53:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:18,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:53:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126353229] [2022-07-19 15:53:19,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687453431] [2022-07-19 15:53:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687453431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:19,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:19,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-19 15:53:19,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238263612] [2022-07-19 15:53:19,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:53:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:53:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:53:19,026 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-19 15:53:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:19,233 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-07-19 15:53:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:53:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-07-19 15:53:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:19,236 INFO L225 Difference]: With dead ends: 215 [2022-07-19 15:53:19,236 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 15:53:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:53:19,237 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:19,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 199 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:53:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 15:53:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-07-19 15:53:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-19 15:53:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-07-19 15:53:19,257 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-07-19 15:53:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:19,258 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-07-19 15:53:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-19 15:53:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-07-19 15:53:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 15:53:19,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:19,259 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:19,277 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 15:53:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:19,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:19,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-07-19 15:53:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:19,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383477046] [2022-07-19 15:53:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:19,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406327538] [2022-07-19 15:53:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:19,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:19,479 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 15:53:19,480 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 15:53:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:19,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:53:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:19,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 15:53:19,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383477046] [2022-07-19 15:53:19,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406327538] [2022-07-19 15:53:19,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406327538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:19,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:19,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-19 15:53:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352846224] [2022-07-19 15:53:19,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:53:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:53:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:53:19,742 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-19 15:53:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:20,012 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-07-19 15:53:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 15:53:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-07-19 15:53:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:20,014 INFO L225 Difference]: With dead ends: 207 [2022-07-19 15:53:20,014 INFO L226 Difference]: Without dead ends: 202 [2022-07-19 15:53:20,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:53:20,015 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:20,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 276 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:53:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-19 15:53:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-07-19 15:53:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-19 15:53:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-07-19 15:53:20,038 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-07-19 15:53:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:20,039 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-07-19 15:53:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-19 15:53:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-07-19 15:53:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 15:53:20,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:20,041 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:20,067 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 15:53:20,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:53:20,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-07-19 15:53:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:20,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21391637] [2022-07-19 15:53:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:20,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:20,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:20,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907982531] [2022-07-19 15:53:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:20,268 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 15:53:20,269 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 15:53:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:20,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:53:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 15:53:20,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-19 15:53:20,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21391637] [2022-07-19 15:53:20,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907982531] [2022-07-19 15:53:20,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907982531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:20,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:20,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-19 15:53:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901688266] [2022-07-19 15:53:20,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:53:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:53:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:20,441 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 15:53:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:20,522 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-07-19 15:53:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-07-19 15:53:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:20,527 INFO L225 Difference]: With dead ends: 498 [2022-07-19 15:53:20,527 INFO L226 Difference]: Without dead ends: 355 [2022-07-19 15:53:20,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:20,529 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:20,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 130 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-19 15:53:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-07-19 15:53:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-07-19 15:53:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-07-19 15:53:20,581 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-07-19 15:53:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:20,582 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-07-19 15:53:20,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 15:53:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-07-19 15:53:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 15:53:20,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:20,584 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:20,600 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 15:53:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 15:53:20,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-07-19 15:53:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990850612] [2022-07-19 15:53:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:20,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552381093] [2022-07-19 15:53:20,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:53:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:20,807 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 15:53:20,808 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 15:53:20,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:53:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 15:53:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:53:21,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-19 15:53:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990850612] [2022-07-19 15:53:21,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:21,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552381093] [2022-07-19 15:53:21,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552381093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:21,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:21,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-19 15:53:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659950423] [2022-07-19 15:53:21,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:53:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:53:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:53:21,175 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-19 15:53:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:21,734 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2022-07-19 15:53:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 15:53:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2022-07-19 15:53:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:21,742 INFO L225 Difference]: With dead ends: 981 [2022-07-19 15:53:21,742 INFO L226 Difference]: Without dead ends: 838 [2022-07-19 15:53:21,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:53:21,744 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:21,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 424 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:53:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-19 15:53:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2022-07-19 15:53:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2022-07-19 15:53:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2022-07-19 15:53:21,858 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2022-07-19 15:53:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:21,859 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2022-07-19 15:53:21,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-19 15:53:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2022-07-19 15:53:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 15:53:21,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:21,862 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:21,889 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 15:53:22,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 15:53:22,090 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-07-19 15:53:22,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:22,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60202322] [2022-07-19 15:53:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:22,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:22,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:22,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680356038] [2022-07-19 15:53:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:22,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:22,109 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 15:53:22,111 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 15:53:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:53:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:22,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-19 15:53:22,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60202322] [2022-07-19 15:53:22,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680356038] [2022-07-19 15:53:22,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680356038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:22,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:22,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-19 15:53:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261591782] [2022-07-19 15:53:22,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:22,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 15:53:22,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 15:53:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:53:22,567 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-19 15:53:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:23,233 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2022-07-19 15:53:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 15:53:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2022-07-19 15:53:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:23,238 INFO L225 Difference]: With dead ends: 1281 [2022-07-19 15:53:23,238 INFO L226 Difference]: Without dead ends: 791 [2022-07-19 15:53:23,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:53:23,240 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:23,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 442 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:53:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-19 15:53:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2022-07-19 15:53:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-19 15:53:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2022-07-19 15:53:23,320 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2022-07-19 15:53:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:23,320 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2022-07-19 15:53:23,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-19 15:53:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2022-07-19 15:53:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 15:53:23,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:23,323 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:23,343 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 15:53:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 15:53:23,540 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-07-19 15:53:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:23,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146115826] [2022-07-19 15:53:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:23,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:23,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767913365] [2022-07-19 15:53:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:23,559 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 15:53:23,560 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 15:53:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 15:53:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:23,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-19 15:53:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146115826] [2022-07-19 15:53:24,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767913365] [2022-07-19 15:53:24,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767913365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:24,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:24,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-19 15:53:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579404438] [2022-07-19 15:53:24,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 15:53:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 15:53:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:53:24,031 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-07-19 15:53:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:24,771 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2022-07-19 15:53:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 15:53:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2022-07-19 15:53:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:24,776 INFO L225 Difference]: With dead ends: 846 [2022-07-19 15:53:24,776 INFO L226 Difference]: Without dead ends: 841 [2022-07-19 15:53:24,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:53:24,777 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 627 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:24,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 429 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:53:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-07-19 15:53:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2022-07-19 15:53:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-19 15:53:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2022-07-19 15:53:24,861 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2022-07-19 15:53:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:24,862 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2022-07-19 15:53:24,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-07-19 15:53:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2022-07-19 15:53:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-19 15:53:24,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:24,866 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:24,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 15:53:25,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:25,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2022-07-19 15:53:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199054219] [2022-07-19 15:53:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:25,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:25,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:25,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865344793] [2022-07-19 15:53:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:53:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:25,098 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 15:53:25,099 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 15:53:25,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:53:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 15:53:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-07-19 15:53:25,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199054219] [2022-07-19 15:53:25,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865344793] [2022-07-19 15:53:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865344793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:25,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:53:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028343102] [2022-07-19 15:53:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:25,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:53:25,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:53:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:53:25,189 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 15:53:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:25,285 INFO L93 Difference]: Finished difference Result 1099 states and 1478 transitions. [2022-07-19 15:53:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:53:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 177 [2022-07-19 15:53:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:25,289 INFO L225 Difference]: With dead ends: 1099 [2022-07-19 15:53:25,289 INFO L226 Difference]: Without dead ends: 892 [2022-07-19 15:53:25,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:53:25,291 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:25,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-07-19 15:53:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 857. [2022-07-19 15:53:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 644 states have (on average 1.1770186335403727) internal successors, (758), 651 states have internal predecessors, (758), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2022-07-19 15:53:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1125 transitions. [2022-07-19 15:53:25,388 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1125 transitions. Word has length 177 [2022-07-19 15:53:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:25,388 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1125 transitions. [2022-07-19 15:53:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 15:53:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1125 transitions. [2022-07-19 15:53:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:25,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:25,392 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:25,421 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 15:53:25,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 15:53:25,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:25,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1858915778, now seen corresponding path program 4 times [2022-07-19 15:53:25,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:25,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663391091] [2022-07-19 15:53:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:25,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66616247] [2022-07-19 15:53:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:53:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:25,629 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 15:53:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:53:25,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:53:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 15:53:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-07-19 15:53:25,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:25,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:25,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663391091] [2022-07-19 15:53:25,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66616247] [2022-07-19 15:53:25,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66616247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:25,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:25,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:53:25,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007690855] [2022-07-19 15:53:25,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:53:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:53:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:53:25,718 INFO L87 Difference]: Start difference. First operand 857 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 15:53:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:25,832 INFO L93 Difference]: Finished difference Result 1458 states and 1913 transitions. [2022-07-19 15:53:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:53:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2022-07-19 15:53:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:25,836 INFO L225 Difference]: With dead ends: 1458 [2022-07-19 15:53:25,836 INFO L226 Difference]: Without dead ends: 915 [2022-07-19 15:53:25,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:53:25,838 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-19 15:53:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 863. [2022-07-19 15:53:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 650 states have (on average 1.1753846153846155) internal successors, (764), 659 states have internal predecessors, (764), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2022-07-19 15:53:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1131 transitions. [2022-07-19 15:53:25,924 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1131 transitions. Word has length 183 [2022-07-19 15:53:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:25,924 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1131 transitions. [2022-07-19 15:53:25,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 15:53:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1131 transitions. [2022-07-19 15:53:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:25,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:25,928 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:25,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:26,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 15:53:26,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1116662802, now seen corresponding path program 5 times [2022-07-19 15:53:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775872976] [2022-07-19 15:53:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:26,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:26,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925590340] [2022-07-19 15:53:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:53:26,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:26,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:53:26,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 15:53:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:53:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-07-19 15:53:26,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:26,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775872976] [2022-07-19 15:53:26,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925590340] [2022-07-19 15:53:26,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925590340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:26,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:53:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884685830] [2022-07-19 15:53:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:53:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:53:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:26,362 INFO L87 Difference]: Start difference. First operand 863 states and 1131 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:53:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:26,458 INFO L93 Difference]: Finished difference Result 883 states and 1150 transitions. [2022-07-19 15:53:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 183 [2022-07-19 15:53:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:26,462 INFO L225 Difference]: With dead ends: 883 [2022-07-19 15:53:26,462 INFO L226 Difference]: Without dead ends: 827 [2022-07-19 15:53:26,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:53:26,463 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:26,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-19 15:53:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 802. [2022-07-19 15:53:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 603 states have (on average 1.1691542288557213) internal successors, (705), 611 states have internal predecessors, (705), 175 states have call successors, (175), 24 states have call predecessors, (175), 23 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2022-07-19 15:53:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1054 transitions. [2022-07-19 15:53:26,538 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1054 transitions. Word has length 183 [2022-07-19 15:53:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:26,538 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1054 transitions. [2022-07-19 15:53:26,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 15:53:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1054 transitions. [2022-07-19 15:53:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:26,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:26,542 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:26,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 15:53:26,747 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 6 times [2022-07-19 15:53:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012867570] [2022-07-19 15:53:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:26,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:26,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858631202] [2022-07-19 15:53:26,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:53:26,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:26,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:26,759 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:26,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:53:26,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 15:53:26,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:53:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-07-19 15:53:26,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012867570] [2022-07-19 15:53:26,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858631202] [2022-07-19 15:53:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858631202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:26,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:26,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:53:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578768002] [2022-07-19 15:53:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:53:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:53:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:26,919 INFO L87 Difference]: Start difference. First operand 802 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 15:53:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:26,999 INFO L93 Difference]: Finished difference Result 849 states and 1103 transitions. [2022-07-19 15:53:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:53:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2022-07-19 15:53:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:27,004 INFO L225 Difference]: With dead ends: 849 [2022-07-19 15:53:27,005 INFO L226 Difference]: Without dead ends: 778 [2022-07-19 15:53:27,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:27,006 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:27,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-07-19 15:53:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 751. [2022-07-19 15:53:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 572 states have internal predecessors, (657), 162 states have call successors, (162), 24 states have call predecessors, (162), 23 states have return successors, (161), 154 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-19 15:53:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 980 transitions. [2022-07-19 15:53:27,081 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 980 transitions. Word has length 183 [2022-07-19 15:53:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:27,084 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 980 transitions. [2022-07-19 15:53:27,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 15:53:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 980 transitions. [2022-07-19 15:53:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:27,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:27,087 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:27,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:27,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:53:27,292 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 7 times [2022-07-19 15:53:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709220023] [2022-07-19 15:53:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:27,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:27,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412889250] [2022-07-19 15:53:27,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:53:27,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:27,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:27,310 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:27,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:53:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:27,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:53:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-07-19 15:53:27,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-07-19 15:53:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709220023] [2022-07-19 15:53:27,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412889250] [2022-07-19 15:53:27,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412889250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:27,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:27,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-07-19 15:53:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764120570] [2022-07-19 15:53:27,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:27,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:53:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:53:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:27,703 INFO L87 Difference]: Start difference. First operand 751 states and 980 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 15:53:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:28,542 INFO L93 Difference]: Finished difference Result 1716 states and 2271 transitions. [2022-07-19 15:53:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 15:53:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 183 [2022-07-19 15:53:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:28,548 INFO L225 Difference]: With dead ends: 1716 [2022-07-19 15:53:28,548 INFO L226 Difference]: Without dead ends: 1519 [2022-07-19 15:53:28,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:53:28,549 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 137 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:28,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 888 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:53:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-07-19 15:53:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1310. [2022-07-19 15:53:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 985 states have (on average 1.1796954314720811) internal successors, (1162), 1001 states have internal predecessors, (1162), 301 states have call successors, (301), 24 states have call predecessors, (301), 23 states have return successors, (300), 284 states have call predecessors, (300), 300 states have call successors, (300) [2022-07-19 15:53:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1763 transitions. [2022-07-19 15:53:28,717 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1763 transitions. Word has length 183 [2022-07-19 15:53:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:28,717 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1763 transitions. [2022-07-19 15:53:28,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-19 15:53:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1763 transitions. [2022-07-19 15:53:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:28,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:28,723 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:28,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:28,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 8 times [2022-07-19 15:53:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93944948] [2022-07-19 15:53:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:28,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:28,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289974731] [2022-07-19 15:53:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:53:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:28,953 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:28,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 15:53:29,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:53:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:53:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-19 15:53:29,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-07-19 15:53:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93944948] [2022-07-19 15:53:29,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289974731] [2022-07-19 15:53:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289974731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:29,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-19 15:53:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293717626] [2022-07-19 15:53:29,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:53:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:53:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:53:29,390 INFO L87 Difference]: Start difference. First operand 1310 states and 1763 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-19 15:53:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:30,471 INFO L93 Difference]: Finished difference Result 2710 states and 3671 transitions. [2022-07-19 15:53:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 15:53:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2022-07-19 15:53:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:30,481 INFO L225 Difference]: With dead ends: 2710 [2022-07-19 15:53:30,481 INFO L226 Difference]: Without dead ends: 2413 [2022-07-19 15:53:30,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 15:53:30,483 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 174 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:30,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 678 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:53:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-07-19 15:53:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1964. [2022-07-19 15:53:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1474 states have (on average 1.162822252374491) internal successors, (1714), 1502 states have internal predecessors, (1714), 466 states have call successors, (466), 24 states have call predecessors, (466), 23 states have return successors, (465), 437 states have call predecessors, (465), 465 states have call successors, (465) [2022-07-19 15:53:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2645 transitions. [2022-07-19 15:53:30,759 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2645 transitions. Word has length 183 [2022-07-19 15:53:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:30,760 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2645 transitions. [2022-07-19 15:53:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-19 15:53:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2645 transitions. [2022-07-19 15:53:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:30,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:30,774 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:30,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:30,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:30,996 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 9 times [2022-07-19 15:53:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:30,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154232091] [2022-07-19 15:53:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:31,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72839693] [2022-07-19 15:53:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:53:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:31,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 15:53:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 15:53:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:53:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-07-19 15:53:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-07-19 15:53:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:31,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154232091] [2022-07-19 15:53:31,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:31,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72839693] [2022-07-19 15:53:31,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72839693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:31,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-19 15:53:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447986726] [2022-07-19 15:53:31,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:31,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:53:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:53:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:53:31,912 INFO L87 Difference]: Start difference. First operand 1964 states and 2645 transitions. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-19 15:53:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:36,404 INFO L93 Difference]: Finished difference Result 5447 states and 7433 transitions. [2022-07-19 15:53:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-19 15:53:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) Word has length 183 [2022-07-19 15:53:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:36,423 INFO L225 Difference]: With dead ends: 5447 [2022-07-19 15:53:36,424 INFO L226 Difference]: Without dead ends: 5174 [2022-07-19 15:53:36,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1198, Invalid=7922, Unknown=0, NotChecked=0, Total=9120 [2022-07-19 15:53:36,428 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 462 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3960 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:36,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 3001 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3960 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 15:53:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2022-07-19 15:53:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4213. [2022-07-19 15:53:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 3162 states have (on average 1.1932321315623022) internal successors, (3773), 3239 states have internal predecessors, (3773), 1027 states have call successors, (1027), 24 states have call predecessors, (1027), 23 states have return successors, (1026), 949 states have call predecessors, (1026), 1026 states have call successors, (1026) [2022-07-19 15:53:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 5826 transitions. [2022-07-19 15:53:37,170 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 5826 transitions. Word has length 183 [2022-07-19 15:53:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:37,171 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 5826 transitions. [2022-07-19 15:53:37,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-19 15:53:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 5826 transitions. [2022-07-19 15:53:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 15:53:37,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:37,188 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:37,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:37,394 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 10 times [2022-07-19 15:53:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:37,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979647120] [2022-07-19 15:53:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:37,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:37,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470602517] [2022-07-19 15:53:37,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:53:37,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:37,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:37,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 15:53:37,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:53:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:53:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:37,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-07-19 15:53:38,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:38,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979647120] [2022-07-19 15:53:38,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470602517] [2022-07-19 15:53:38,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470602517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:38,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:38,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2022-07-19 15:53:38,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962033844] [2022-07-19 15:53:38,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 15:53:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 15:53:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 15:53:38,576 INFO L87 Difference]: Start difference. First operand 4213 states and 5826 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-07-19 15:53:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:42,522 INFO L93 Difference]: Finished difference Result 18228 states and 27953 transitions. [2022-07-19 15:53:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-19 15:53:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2022-07-19 15:53:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:42,586 INFO L225 Difference]: With dead ends: 18228 [2022-07-19 15:53:42,586 INFO L226 Difference]: Without dead ends: 18219 [2022-07-19 15:53:42,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 15:53:42,595 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1319 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:42,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 880 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:53:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2022-07-19 15:53:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 17884. [2022-07-19 15:53:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17884 states, 13435 states have (on average 1.2844064011909193) internal successors, (17256), 13533 states have internal predecessors, (17256), 4405 states have call successors, (4405), 44 states have call predecessors, (4405), 43 states have return successors, (4404), 4306 states have call predecessors, (4404), 4404 states have call successors, (4404) [2022-07-19 15:53:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17884 states to 17884 states and 26065 transitions. [2022-07-19 15:53:45,125 INFO L78 Accepts]: Start accepts. Automaton has 17884 states and 26065 transitions. Word has length 183 [2022-07-19 15:53:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:45,125 INFO L495 AbstractCegarLoop]: Abstraction has 17884 states and 26065 transitions. [2022-07-19 15:53:45,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-07-19 15:53:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17884 states and 26065 transitions. [2022-07-19 15:53:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-19 15:53:45,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:45,142 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:45,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:45,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:45,356 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2022-07-19 15:53:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742720292] [2022-07-19 15:53:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:45,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:45,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:45,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623628800] [2022-07-19 15:53:45,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:53:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:45,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:45,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 15:53:45,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:53:45,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 15:53:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:45,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-07-19 15:53:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742720292] [2022-07-19 15:53:46,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623628800] [2022-07-19 15:53:46,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623628800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:46,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:46,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2022-07-19 15:53:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023363202] [2022-07-19 15:53:46,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 15:53:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 15:53:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 15:53:46,360 INFO L87 Difference]: Start difference. First operand 17884 states and 26065 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-07-19 15:53:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:49,711 INFO L93 Difference]: Finished difference Result 26787 states and 39519 transitions. [2022-07-19 15:53:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-19 15:53:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2022-07-19 15:53:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:49,749 INFO L225 Difference]: With dead ends: 26787 [2022-07-19 15:53:49,749 INFO L226 Difference]: Without dead ends: 13373 [2022-07-19 15:53:49,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-07-19 15:53:49,784 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1637 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1637 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:49,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1637 Valid, 991 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1012 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:53:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2022-07-19 15:53:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 13105. [2022-07-19 15:53:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13105 states, 9833 states have (on average 1.2012610596969389) internal successors, (11812), 9890 states have internal predecessors, (11812), 3226 states have call successors, (3226), 46 states have call predecessors, (3226), 45 states have return successors, (3225), 3168 states have call predecessors, (3225), 3225 states have call successors, (3225) [2022-07-19 15:53:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13105 states to 13105 states and 18263 transitions. [2022-07-19 15:53:51,545 INFO L78 Accepts]: Start accepts. Automaton has 13105 states and 18263 transitions. Word has length 189 [2022-07-19 15:53:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:51,545 INFO L495 AbstractCegarLoop]: Abstraction has 13105 states and 18263 transitions. [2022-07-19 15:53:51,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-07-19 15:53:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 13105 states and 18263 transitions. [2022-07-19 15:53:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-19 15:53:51,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:51,564 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:51,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 15:53:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:51,779 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2022-07-19 15:53:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612488211] [2022-07-19 15:53:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:51,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:51,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921754544] [2022-07-19 15:53:51,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:53:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:51,794 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:51,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 15:53:51,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:53:51,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:53:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:52,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-07-19 15:53:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612488211] [2022-07-19 15:53:52,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921754544] [2022-07-19 15:53:52,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921754544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:52,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:52,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-19 15:53:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021931502] [2022-07-19 15:53:52,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:52,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 15:53:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 15:53:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 15:53:52,908 INFO L87 Difference]: Start difference. First operand 13105 states and 18263 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-07-19 15:53:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:56,244 INFO L93 Difference]: Finished difference Result 14122 states and 19800 transitions. [2022-07-19 15:53:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-19 15:53:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2022-07-19 15:53:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:56,284 INFO L225 Difference]: With dead ends: 14122 [2022-07-19 15:53:56,284 INFO L226 Difference]: Without dead ends: 13973 [2022-07-19 15:53:56,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-07-19 15:53:56,292 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1516 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:56,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 964 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1176 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:53:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13973 states. [2022-07-19 15:53:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13973 to 13195. [2022-07-19 15:53:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13195 states, 9898 states have (on average 1.1371994342291372) internal successors, (11256), 9977 states have internal predecessors, (11256), 3249 states have call successors, (3249), 48 states have call predecessors, (3249), 47 states have return successors, (3248), 3169 states have call predecessors, (3248), 3248 states have call successors, (3248) [2022-07-19 15:53:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13195 states to 13195 states and 17753 transitions. [2022-07-19 15:53:58,084 INFO L78 Accepts]: Start accepts. Automaton has 13195 states and 17753 transitions. Word has length 195 [2022-07-19 15:53:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:58,085 INFO L495 AbstractCegarLoop]: Abstraction has 13195 states and 17753 transitions. [2022-07-19 15:53:58,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-07-19 15:53:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 13195 states and 17753 transitions. [2022-07-19 15:53:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-07-19 15:53:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:58,134 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:58,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:58,347 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 11 times [2022-07-19 15:53:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507149705] [2022-07-19 15:53:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:58,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:58,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630193349] [2022-07-19 15:53:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:53:58,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:58,367 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:58,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 15:53:58,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-19 15:53:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 15:53:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:54:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 832 refuted. 160 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-07-19 15:54:57,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:55:28,186 WARN L233 SmtUtils]: Spent 28.53s on a formula simplification. DAG size of input: 6425 DAG size of output: 6391 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)