./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.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/ps6-ll_valuebound50.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 aa3033c827040052fc2b3f2ac84da9b892249c5596676af10298d2e88bf55166 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 16:37:53,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:37:53,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:37:53,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:37:53,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:37:53,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:37:53,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:37:53,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:37:53,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:37:53,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:37:53,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:37:53,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:37:53,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:37:53,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:37:53,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:37:53,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:37:53,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:37:53,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:37:53,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:37:53,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:37:53,870 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:37:53,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:37:53,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:37:53,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:37:53,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:37:53,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:37:53,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:37:53,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:37:53,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:37:53,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:37:53,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:37:53,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:37:53,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:37:53,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:37:53,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:37:53,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:37:53,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:37:53,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:37:53,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:37:53,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:37:53,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:37:53,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:37:53,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:37:53,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:37:53,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:37:53,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:37:53,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:37:53,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:37:53,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:37:53,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:37:53,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:37:53,931 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:37:53,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:37:53,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:37:53,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:37:53,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:37:53,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:37:53,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:37:53,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:37:53,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:37:53,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:37:53,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:37:53,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:37:53,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:37:53,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:37:53,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:37:53,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:37:53,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:37:53,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:37:53,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:37:53,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:37:53,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:37:53,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:37:53,949 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:37:53,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:37:53,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:37:53,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa3033c827040052fc2b3f2ac84da9b892249c5596676af10298d2e88bf55166 [2022-07-19 16:37:54,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:37:54,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:37:54,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:37:54,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:37:54,162 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:37:54,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-07-19 16:37:54,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc28f1447/e3fcb94ceed44811934473f46486706b/FLAG40addb27c [2022-07-19 16:37:54,598 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:37:54,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-07-19 16:37:54,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc28f1447/e3fcb94ceed44811934473f46486706b/FLAG40addb27c [2022-07-19 16:37:55,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc28f1447/e3fcb94ceed44811934473f46486706b [2022-07-19 16:37:55,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:37:55,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:37:55,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:37:55,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:37:55,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:37:55,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32eaf9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55, skipping insertion in model container [2022-07-19 16:37:55,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:37:55,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:37:55,169 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/ps6-ll_valuebound50.c[458,471] [2022-07-19 16:37:55,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:37:55,205 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:37:55,221 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/ps6-ll_valuebound50.c[458,471] [2022-07-19 16:37:55,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:37:55,250 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:37:55,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55 WrapperNode [2022-07-19 16:37:55,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:37:55,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:37:55,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:37:55,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:37:55,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,287 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-07-19 16:37:55,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:37:55,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:37:55,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:37:55,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:37:55,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:37:55,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:37:55,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:37:55,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:37:55,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (1/1) ... [2022-07-19 16:37:55,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:37:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:37:55,352 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 16:37:55,375 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 16:37:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:37:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 16:37:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 16:37:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:37:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:37:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:37:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:37:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:37:55,451 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:37:55,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:37:55,584 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:37:55,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:37:55,594 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 16:37:55,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:37:55 BoogieIcfgContainer [2022-07-19 16:37:55,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:37:55,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:37:55,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:37:55,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:37:55,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:37:55" (1/3) ... [2022-07-19 16:37:55,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48964e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:37:55, skipping insertion in model container [2022-07-19 16:37:55,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:37:55" (2/3) ... [2022-07-19 16:37:55,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48964e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:37:55, skipping insertion in model container [2022-07-19 16:37:55,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:37:55" (3/3) ... [2022-07-19 16:37:55,606 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2022-07-19 16:37:55,618 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:37:55,619 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:37:55,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:37:55,685 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@55e17add, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a6bebf9 [2022-07-19 16:37:55,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:37:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:37:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 16:37:55,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:37:55,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:37:55,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:37:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:37:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2022-07-19 16:37:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:37:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063584154] [2022-07-19 16:37:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:37:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:55,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 16:37:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:55,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 16:37:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:55,882 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 16:37:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:37:55,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063584154] [2022-07-19 16:37:55,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063584154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:37:55,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:37:55,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:37:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549035332] [2022-07-19 16:37:55,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:37:55,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:37:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:37:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:37:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:37:55,925 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 16:37:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:37:55,944 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2022-07-19 16:37:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:37:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 16:37:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:37:55,956 INFO L225 Difference]: With dead ends: 45 [2022-07-19 16:37:55,956 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 16:37:55,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 16:37:55,964 INFO L413 NwaCegarLoop]: 27 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, 27 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 16:37:55,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:37:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 16:37:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-19 16:37:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 16:37:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-19 16:37:56,000 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2022-07-19 16:37:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:37:56,001 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-19 16:37:56,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 16:37:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-19 16:37:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 16:37:56,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:37:56,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:37:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:37:56,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:37:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:37:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2022-07-19 16:37:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:37:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129107299] [2022-07-19 16:37:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:37:56,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:37:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404026471] [2022-07-19 16:37:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:56,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:37:56,047 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 16:37:56,054 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 16:37:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:37:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:37:56,251 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 16:37:56,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:37:56,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:37:56,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129107299] [2022-07-19 16:37:56,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:37:56,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404026471] [2022-07-19 16:37:56,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404026471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:37:56,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:37:56,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:37:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064673469] [2022-07-19 16:37:56,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:37:56,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:37:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:37:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:37:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:37:56,259 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 16:37:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:37:56,386 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-19 16:37:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:37:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2022-07-19 16:37:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:37:56,388 INFO L225 Difference]: With dead ends: 31 [2022-07-19 16:37:56,388 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 16:37:56,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 16:37:56,389 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:37:56,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:37:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 16:37:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 16:37:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:37:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-19 16:37:56,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-07-19 16:37:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:37:56,397 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-19 16:37:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 16:37:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-19 16:37:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 16:37:56,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:37:56,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:37:56,425 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 16:37:56,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:56,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:37:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:37:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2022-07-19 16:37:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:37:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290483745] [2022-07-19 16:37:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:37:56,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:37:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104988561] [2022-07-19 16:37:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:56,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:37:56,614 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 16:37:56,628 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 16:37:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:37:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:37:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 16:37:56,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:37:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 16:37:57,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:37:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290483745] [2022-07-19 16:37:57,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:37:57,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104988561] [2022-07-19 16:37:57,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104988561] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 16:37:57,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:37:57,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-19 16:37:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887126197] [2022-07-19 16:37:57,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:37:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:37:57,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:37:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:37:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:37:57,033 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 16:37:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:37:57,099 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-07-19 16:37:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:37:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-19 16:37:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:37:57,101 INFO L225 Difference]: With dead ends: 33 [2022-07-19 16:37:57,101 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 16:37:57,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:37:57,102 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:37:57,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 59 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:37:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 16:37:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 16:37:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:37:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-19 16:37:57,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-07-19 16:37:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:37:57,117 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-19 16:37:57,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 16:37:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-19 16:37:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 16:37:57,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:37:57,120 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:37:57,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 16:37:57,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 16:37:57,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:37:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:37:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2022-07-19 16:37:57,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:37:57,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849375927] [2022-07-19 16:37:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:37:57,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:37:57,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105398396] [2022-07-19 16:37:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:57,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:37:57,395 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 16:37:57,397 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 16:37:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:37:57,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 16:37:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:37:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 16:37:57,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:37:57,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:37:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849375927] [2022-07-19 16:37:57,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:37:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105398396] [2022-07-19 16:37:57,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105398396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:37:57,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:37:57,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-19 16:37:57,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379871675] [2022-07-19 16:37:57,793 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:37:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 16:37:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:37:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 16:37:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:37:57,796 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 16:37:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:37:57,896 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-07-19 16:37:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 16:37:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2022-07-19 16:37:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:37:57,898 INFO L225 Difference]: With dead ends: 38 [2022-07-19 16:37:57,898 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 16:37:57,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-19 16:37:57,899 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:37:57,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:37:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 16:37:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-19 16:37:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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 16:37:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-19 16:37:57,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2022-07-19 16:37:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:37:57,920 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-19 16:37:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 16:37:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-19 16:37:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 16:37:57,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:37:57,921 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:37:57,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 16:37:58,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:58,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:37:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:37:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2022-07-19 16:37:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:37:58,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302898272] [2022-07-19 16:37:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:37:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:37:58,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:37:58,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601056096] [2022-07-19 16:37:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:37:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:37:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:37:58,146 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 16:37:58,147 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 16:37:58,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:37:58,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:37:58,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 16:37:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:37:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 16:37:58,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302898272] [2022-07-19 16:38:22,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601056096] [2022-07-19 16:38:22,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601056096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:22,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:22,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-19 16:38:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722187322] [2022-07-19 16:38:22,262 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:22,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 16:38:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 16:38:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2022-07-19 16:38:22,263 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 16:38:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:22,447 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-19 16:38:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:38:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-19 16:38:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:22,449 INFO L225 Difference]: With dead ends: 41 [2022-07-19 16:38:22,449 INFO L226 Difference]: Without dead ends: 35 [2022-07-19 16:38:22,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2022-07-19 16:38:22,450 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:22,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:38:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-19 16:38:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-19 16:38:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 16:38:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-19 16:38:22,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2022-07-19 16:38:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:22,465 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-19 16:38:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 16:38:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-19 16:38:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 16:38:22,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:22,468 INFO L195 NwaCegarLoop]: trace histogram [6, 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 16:38:22,477 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 16:38:22,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:22,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2022-07-19 16:38:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670210192] [2022-07-19 16:38:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:22,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:22,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795122768] [2022-07-19 16:38:22,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:38:22,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:22,698 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 16:38:22,699 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 16:38:22,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 16:38:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 16:38:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 16:38:23,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:23,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670210192] [2022-07-19 16:38:23,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795122768] [2022-07-19 16:38:23,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795122768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:23,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:23,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-19 16:38:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717056178] [2022-07-19 16:38:23,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 16:38:23,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:23,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 16:38:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-19 16:38:23,281 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-19 16:38:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:23,409 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-07-19 16:38:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 16:38:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2022-07-19 16:38:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:23,412 INFO L225 Difference]: With dead ends: 44 [2022-07-19 16:38:23,412 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 16:38:23,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-19 16:38:23,413 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:23,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 167 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:38:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 16:38:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-19 16:38:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 4 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 16:38:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-07-19 16:38:23,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2022-07-19 16:38:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:23,427 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-07-19 16:38:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-19 16:38:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-07-19 16:38:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 16:38:23,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:23,429 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:23,439 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 16:38:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:23,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2022-07-19 16:38:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744082977] [2022-07-19 16:38:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:23,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211916862] [2022-07-19 16:38:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:38:23,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:23,662 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 16:38:23,663 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 16:38:23,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:38:23,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 16:38:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 16:38:23,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744082977] [2022-07-19 16:38:24,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211916862] [2022-07-19 16:38:24,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211916862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:24,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-19 16:38:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049220010] [2022-07-19 16:38:24,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:24,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:38:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:38:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-19 16:38:24,003 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 16:38:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:24,154 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-07-19 16:38:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:38:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2022-07-19 16:38:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:24,155 INFO L225 Difference]: With dead ends: 47 [2022-07-19 16:38:24,155 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 16:38:24,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-19 16:38:24,156 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:24,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:38:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 16:38:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-19 16:38:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 16:38:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-19 16:38:24,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2022-07-19 16:38:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:24,165 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-19 16:38:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 16:38:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-19 16:38:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 16:38:24,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:24,166 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:24,192 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 16:38:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:24,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2022-07-19 16:38:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631428054] [2022-07-19 16:38:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:24,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:24,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581247389] [2022-07-19 16:38:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:38:24,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:24,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:24,411 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 16:38:24,415 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 16:38:27,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 16:38:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 16:38:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-19 16:38:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:27,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631428054] [2022-07-19 16:38:27,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581247389] [2022-07-19 16:38:27,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581247389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:27,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-19 16:38:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341701073] [2022-07-19 16:38:27,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:27,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 16:38:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 16:38:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 16:38:27,360 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 16:38:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:27,537 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-19 16:38:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 16:38:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2022-07-19 16:38:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:27,538 INFO L225 Difference]: With dead ends: 50 [2022-07-19 16:38:27,538 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 16:38:27,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:38:27,539 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:27,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 231 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:38:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 16:38:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-19 16:38:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 16:38:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-19 16:38:27,549 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2022-07-19 16:38:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:27,549 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-19 16:38:27,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 16:38:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-19 16:38:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 16:38:27,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:27,551 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:27,561 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 16:38:27,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:27,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2022-07-19 16:38:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:27,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203814744] [2022-07-19 16:38:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:27,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:27,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017417634] [2022-07-19 16:38:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:38:27,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:27,772 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 16:38:27,781 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 16:38:28,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 16:38:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 16:38:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 16:38:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:28,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203814744] [2022-07-19 16:38:28,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017417634] [2022-07-19 16:38:28,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017417634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:28,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:28,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-19 16:38:28,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970825935] [2022-07-19 16:38:28,644 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:28,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 16:38:28,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 16:38:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-19 16:38:28,645 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 16:38:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:28,851 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-07-19 16:38:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:38:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2022-07-19 16:38:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:28,852 INFO L225 Difference]: With dead ends: 53 [2022-07-19 16:38:28,853 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 16:38:28,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-19 16:38:28,853 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 266 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 16:38:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 16:38:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-19 16:38:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 16:38:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-19 16:38:28,862 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2022-07-19 16:38:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-19 16:38:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 16:38:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-19 16:38:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 16:38:28,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:28,864 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:28,873 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 16:38:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 16:38:29,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2022-07-19 16:38:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465806218] [2022-07-19 16:38:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:29,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:29,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:29,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733140598] [2022-07-19 16:38:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:38:29,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:29,091 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 16:38:29,092 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 16:38:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:38:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 16:38:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-19 16:38:29,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:30,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:30,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465806218] [2022-07-19 16:38:30,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:30,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733140598] [2022-07-19 16:38:30,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733140598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:30,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:30,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-19 16:38:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703811163] [2022-07-19 16:38:30,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 16:38:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 16:38:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:38:30,004 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 16:38:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:30,243 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-19 16:38:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 16:38:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2022-07-19 16:38:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:30,244 INFO L225 Difference]: With dead ends: 56 [2022-07-19 16:38:30,244 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 16:38:30,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-19 16:38:30,245 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:30,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 16:38:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 16:38:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-19 16:38:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 16:38:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-07-19 16:38:30,261 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2022-07-19 16:38:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:30,262 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-07-19 16:38:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 16:38:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-07-19 16:38:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 16:38:30,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:30,268 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:30,277 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 16:38:30,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 16:38:30,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2022-07-19 16:38:30,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:30,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152117327] [2022-07-19 16:38:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:30,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:30,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:30,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98869099] [2022-07-19 16:38:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:38:30,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:30,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:30,492 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 16:38:30,495 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 16:38:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:38:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:30,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 16:38:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-19 16:38:31,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152117327] [2022-07-19 16:38:31,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98869099] [2022-07-19 16:38:31,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98869099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:31,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:31,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-19 16:38:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423859686] [2022-07-19 16:38:31,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:31,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 16:38:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 16:38:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-19 16:38:31,334 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-07-19 16:38:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:31,568 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-07-19 16:38:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 16:38:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 85 [2022-07-19 16:38:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:31,569 INFO L225 Difference]: With dead ends: 59 [2022-07-19 16:38:31,569 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 16:38:31,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:38:31,570 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:31,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 342 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 16:38:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 16:38:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-19 16:38:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 16:38:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-19 16:38:31,579 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2022-07-19 16:38:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:31,580 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-19 16:38:31,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-07-19 16:38:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-19 16:38:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-19 16:38:31,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:31,581 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:31,587 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 16:38:31,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 16:38:31,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1063034534, now seen corresponding path program 9 times [2022-07-19 16:38:31,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:31,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392911644] [2022-07-19 16:38:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:31,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:31,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088115955] [2022-07-19 16:38:31,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:38:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:31,800 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 16:38:31,801 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 16:38:32,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-19 16:38:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 16:38:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 48 proven. 139 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-07-19 16:38:32,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:33,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392911644] [2022-07-19 16:38:33,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088115955] [2022-07-19 16:38:33,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088115955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:33,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:33,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-19 16:38:33,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306345769] [2022-07-19 16:38:33,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 16:38:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 16:38:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-19 16:38:33,087 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-19 16:38:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:33,582 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-07-19 16:38:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 16:38:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 92 [2022-07-19 16:38:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:33,583 INFO L225 Difference]: With dead ends: 66 [2022-07-19 16:38:33,584 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 16:38:33,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-07-19 16:38:33,585 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:33,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 321 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 16:38:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 16:38:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-19 16:38:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 16:38:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-19 16:38:33,595 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2022-07-19 16:38:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:33,595 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-19 16:38:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-19 16:38:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-19 16:38:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 16:38:33,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:33,597 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:33,607 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 16:38:33,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 16:38:33,803 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1524389175, now seen corresponding path program 10 times [2022-07-19 16:38:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997385049] [2022-07-19 16:38:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:33,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:33,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:33,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188893825] [2022-07-19 16:38:33,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:38:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:33,825 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 16:38:33,827 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 16:38:33,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:38:33,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:38:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 16:38:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:38:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-19 16:38:34,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:38:34,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:38:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997385049] [2022-07-19 16:38:34,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:38:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188893825] [2022-07-19 16:38:34,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188893825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:38:34,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:38:34,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-19 16:38:34,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213668322] [2022-07-19 16:38:34,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:38:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 16:38:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:38:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 16:38:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:38:34,306 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-19 16:38:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:38:34,646 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-19 16:38:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 16:38:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 99 [2022-07-19 16:38:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:38:34,648 INFO L225 Difference]: With dead ends: 69 [2022-07-19 16:38:34,648 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 16:38:34,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-19 16:38:34,649 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:38:34,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 426 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:38:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 16:38:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-19 16:38:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 16:38:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-19 16:38:34,659 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2022-07-19 16:38:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:38:34,659 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-19 16:38:34,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-19 16:38:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-19 16:38:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 16:38:34,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:38:34,661 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:38:34,690 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 16:38:34,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 16:38:34,875 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:38:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:38:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1130381638, now seen corresponding path program 11 times [2022-07-19 16:38:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:38:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35964739] [2022-07-19 16:38:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:38:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:38:34,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:38:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937996530] [2022-07-19 16:38:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:38:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:38:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:38:34,890 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 16:38:34,893 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 16:39:12,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-19 16:39:12,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:39:12,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 16:39:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:39:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-19 16:39:12,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:39:12,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:39:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35964739] [2022-07-19 16:39:12,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:39:12,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937996530] [2022-07-19 16:39:12,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937996530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:39:12,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:39:12,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-19 16:39:12,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990716073] [2022-07-19 16:39:12,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:39:12,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 16:39:12,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:39:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 16:39:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:39:12,548 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-19 16:39:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:39:12,922 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2022-07-19 16:39:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 16:39:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 106 [2022-07-19 16:39:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:39:12,923 INFO L225 Difference]: With dead ends: 72 [2022-07-19 16:39:12,923 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 16:39:12,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-19 16:39:12,924 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:39:12,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 471 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:39:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 16:39:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-19 16:39:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 16:39:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-07-19 16:39:12,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2022-07-19 16:39:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:39:12,935 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-07-19 16:39:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-19 16:39:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-07-19 16:39:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 16:39:12,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:39:12,936 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:39:12,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 16:39:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 16:39:13,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:39:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:39:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash -316789801, now seen corresponding path program 12 times [2022-07-19 16:39:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:39:13,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352604485] [2022-07-19 16:39:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:39:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:39:13,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:39:13,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331655361] [2022-07-19 16:39:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:39:13,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:39:13,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:39:13,165 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 16:39:13,175 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 16:39:53,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-19 16:39:53,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:39:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-19 16:39:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:39:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 28 proven. 234 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-07-19 16:39:54,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:39:54,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:39:54,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352604485] [2022-07-19 16:39:54,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:39:54,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331655361] [2022-07-19 16:39:54,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331655361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:39:54,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:39:54,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-19 16:39:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695751338] [2022-07-19 16:39:54,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:39:54,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 16:39:54,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:39:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 16:39:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-19 16:39:54,419 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-19 16:39:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:39:54,902 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-07-19 16:39:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 16:39:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 113 [2022-07-19 16:39:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:39:54,904 INFO L225 Difference]: With dead ends: 75 [2022-07-19 16:39:54,904 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 16:39:54,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-19 16:39:54,905 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 16:39:54,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 16:39:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 16:39:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-19 16:39:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 16:39:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-07-19 16:39:54,921 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2022-07-19 16:39:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:39:54,922 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-07-19 16:39:54,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-19 16:39:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-07-19 16:39:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 16:39:54,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:39:54,923 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:39:54,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 16:39:55,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:39:55,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:39:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:39:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2004694042, now seen corresponding path program 13 times [2022-07-19 16:39:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:39:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780009325] [2022-07-19 16:39:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:39:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:39:55,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:39:55,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109288227] [2022-07-19 16:39:55,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:39:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:39:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:39:55,137 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 16:39:55,138 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 16:39:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:39:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 16:39:56,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:39:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 30 proven. 273 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-07-19 16:39:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:39:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:39:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780009325] [2022-07-19 16:39:56,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:39:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109288227] [2022-07-19 16:39:56,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109288227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:39:56,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:39:56,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-19 16:39:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387723111] [2022-07-19 16:39:56,479 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:39:56,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 16:39:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:39:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 16:39:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-19 16:39:56,481 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 16:39:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:39:57,004 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-07-19 16:39:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 16:39:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 120 [2022-07-19 16:39:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:39:57,006 INFO L225 Difference]: With dead ends: 78 [2022-07-19 16:39:57,006 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 16:39:57,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-19 16:39:57,007 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 16:39:57,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 567 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 16:39:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 16:39:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-19 16:39:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 16:39:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-19 16:39:57,021 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2022-07-19 16:39:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:39:57,025 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-19 16:39:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 16:39:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-19 16:39:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 16:39:57,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:39:57,027 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:39:57,033 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 16:39:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 16:39:57,233 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:39:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:39:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1919686025, now seen corresponding path program 14 times [2022-07-19 16:39:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:39:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156141288] [2022-07-19 16:39:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:39:57,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:39:57,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:39:57,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412586463] [2022-07-19 16:39:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:39:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:39:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:39:57,243 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 16:39:57,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process