./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/egcd2-ll_valuebound100.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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:23:29,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:23:29,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:23:29,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:23:29,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:23:29,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:23:29,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:23:29,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:23:29,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:23:29,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:23:29,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:23:29,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:23:29,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:23:29,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:23:29,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:23:29,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:23:29,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:23:29,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:23:29,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:23:29,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:23:29,996 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:23:29,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:23:29,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:23:29,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:23:29,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:23:30,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:23:30,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:23:30,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:23:30,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:23:30,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:23:30,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:23:30,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:23:30,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:23:30,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:23:30,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:23:30,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:23:30,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:23:30,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:23:30,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:23:30,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:23:30,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:23:30,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:23:30,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:23:30,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:23:30,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:23:30,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:23:30,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:23:30,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:23:30,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:23:30,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:23:30,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:23:30,041 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:23:30,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:23:30,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:23:30,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:23:30,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:23:30,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:23:30,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:23:30,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:23:30,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:23:30,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:23:30,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:23:30,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:23:30,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:23:30,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:23:30,046 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 [2022-07-13 16:23:30,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:23:30,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:23:30,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:23:30,219 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:23:30,220 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:23:30,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-07-13 16:23:30,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e708839f/41b7676df9ca48cca98fff37da2b57b3/FLAG677fc4b93 [2022-07-13 16:23:30,628 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:23:30,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-07-13 16:23:30,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e708839f/41b7676df9ca48cca98fff37da2b57b3/FLAG677fc4b93 [2022-07-13 16:23:30,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e708839f/41b7676df9ca48cca98fff37da2b57b3 [2022-07-13 16:23:30,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:23:30,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:23:30,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:23:30,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:23:30,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:23:30,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6421219b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30, skipping insertion in model container [2022-07-13 16:23:30,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:23:30,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:23:30,765 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/egcd2-ll_valuebound100.c[490,503] [2022-07-13 16:23:30,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:23:30,781 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:23:30,789 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/egcd2-ll_valuebound100.c[490,503] [2022-07-13 16:23:30,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:23:30,807 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:23:30,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30 WrapperNode [2022-07-13 16:23:30,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:23:30,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:23:30,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:23:30,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:23:30,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,834 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-13 16:23:30,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:23:30,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:23:30,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:23:30,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:23:30,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:23:30,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:23:30,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:23:30,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:23:30,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (1/1) ... [2022-07-13 16:23:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:23:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:30,890 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) [2022-07-13 16:23:30,908 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 [2022-07-13 16:23:30,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:23:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 16:23:30,924 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 16:23:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:23:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:23:30,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:23:30,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:23:30,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:23:30,968 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:23:30,970 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:23:31,105 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:23:31,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:23:31,109 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:23:31,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:23:31 BoogieIcfgContainer [2022-07-13 16:23:31,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:23:31,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:23:31,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:23:31,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:23:31,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:23:30" (1/3) ... [2022-07-13 16:23:31,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26bf7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:23:31, skipping insertion in model container [2022-07-13 16:23:31,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:23:30" (2/3) ... [2022-07-13 16:23:31,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26bf7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:23:31, skipping insertion in model container [2022-07-13 16:23:31,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:23:31" (3/3) ... [2022-07-13 16:23:31,117 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2022-07-13 16:23:31,126 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:23:31,127 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:23:31,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:23:31,198 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@23ba6613, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f342857 [2022-07-13 16:23:31,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:23:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 16:23:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 16:23:31,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:31,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:31,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-07-13 16:23:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:31,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098209766] [2022-07-13 16:23:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 16:23:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 16:23:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 16:23:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 16:23:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 16:23:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 16:23:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-13 16:23:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098209766] [2022-07-13 16:23:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098209766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:23:31,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:23:31,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:23:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563447833] [2022-07-13 16:23:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:23:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:23:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:23:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:23:31,357 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:23:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:31,371 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-07-13 16:23:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:23:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-13 16:23:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:31,377 INFO L225 Difference]: With dead ends: 67 [2022-07-13 16:23:31,377 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 16:23:31,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:23:31,381 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2022-07-13 16:23:31,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:23:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 16:23:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-13 16:23:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:23:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-07-13 16:23:31,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-07-13 16:23:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-07-13 16:23:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:23:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-07-13 16:23:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 16:23:31,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:31,410 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:23:31,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-07-13 16:23:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655747872] [2022-07-13 16:23:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:31,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:31,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414921941] [2022-07-13 16:23:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:31,429 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) [2022-07-13 16:23:31,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:23:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:23:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 16:23:31,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 16:23:31,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655747872] [2022-07-13 16:23:31,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414921941] [2022-07-13 16:23:31,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414921941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:23:31,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:23:31,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-13 16:23:31,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116263703] [2022-07-13 16:23:31,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:31,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 16:23:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 16:23:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:23:31,697 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:23:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:31,832 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-07-13 16:23:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:23:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-07-13 16:23:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:31,834 INFO L225 Difference]: With dead ends: 48 [2022-07-13 16:23:31,834 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 16:23:31,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:23:31,835 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:31,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 108 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:23:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 16:23:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-13 16:23:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:23:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-13 16:23:31,846 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-07-13 16:23:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:31,847 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-13 16:23:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:23:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-13 16:23:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 16:23:31,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:31,850 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:31,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:32,055 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 [2022-07-13 16:23:32,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-07-13 16:23:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288570342] [2022-07-13 16:23:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:32,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:32,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104337854] [2022-07-13 16:23:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:32,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:32,070 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) [2022-07-13 16:23:32,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:23:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 16:23:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 16:23:32,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-13 16:23:32,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288570342] [2022-07-13 16:23:32,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104337854] [2022-07-13 16:23:32,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104337854] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:32,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:32,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-13 16:23:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793508761] [2022-07-13 16:23:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:23:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:23:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:23:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:23:32,293 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 16:23:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:32,345 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-13 16:23:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:23:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-13 16:23:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:32,349 INFO L225 Difference]: With dead ends: 39 [2022-07-13 16:23:32,349 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 16:23:32,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:23:32,352 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:32,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:23:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 16:23:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-13 16:23:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:23:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-13 16:23:32,362 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-07-13 16:23:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:32,362 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-13 16:23:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 16:23:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-13 16:23:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 16:23:32,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:32,363 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:32,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 16:23:32,575 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 [2022-07-13 16:23:32,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-07-13 16:23:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300629467] [2022-07-13 16:23:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:32,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768630164] [2022-07-13 16:23:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:32,590 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) [2022-07-13 16:23:32,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:23:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:23:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-13 16:23:32,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:23:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300629467] [2022-07-13 16:23:32,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768630164] [2022-07-13 16:23:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768630164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:23:32,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:23:32,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:23:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486372038] [2022-07-13 16:23:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:23:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:23:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:23:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:23:32,675 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 16:23:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:32,708 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-07-13 16:23:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:23:32,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-07-13 16:23:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:32,710 INFO L225 Difference]: With dead ends: 50 [2022-07-13 16:23:32,710 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 16:23:32,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:23:32,711 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:32,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:23:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 16:23:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-13 16:23:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 16:23:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-07-13 16:23:32,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-07-13 16:23:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-13 16:23:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 16:23:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-07-13 16:23:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 16:23:32,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:32,729 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:32,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:32,931 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 [2022-07-13 16:23:32,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-07-13 16:23:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049487152] [2022-07-13 16:23:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:32,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:32,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983349361] [2022-07-13 16:23:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:32,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:32,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:32,943 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) [2022-07-13 16:23:32,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:23:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 16:23:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 16:23:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 16:23:33,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049487152] [2022-07-13 16:23:33,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983349361] [2022-07-13 16:23:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983349361] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:33,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-13 16:23:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582841246] [2022-07-13 16:23:33,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:23:33,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:23:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:23:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:23:33,172 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 16:23:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:33,209 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-07-13 16:23:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:23:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-07-13 16:23:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:33,211 INFO L225 Difference]: With dead ends: 54 [2022-07-13 16:23:33,211 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 16:23:33,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:23:33,212 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:33,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:23:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 16:23:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-13 16:23:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 16:23:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-07-13 16:23:33,218 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-07-13 16:23:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:33,218 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-07-13 16:23:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 16:23:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-07-13 16:23:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 16:23:33,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:33,220 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:33,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 16:23:33,436 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 [2022-07-13 16:23:33,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-07-13 16:23:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:33,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305794394] [2022-07-13 16:23:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:33,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059541796] [2022-07-13 16:23:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:33,447 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) [2022-07-13 16:23:33,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:23:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:33,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 16:23:33,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-13 16:23:33,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:33,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:33,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305794394] [2022-07-13 16:23:33,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059541796] [2022-07-13 16:23:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059541796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-13 16:23:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884946754] [2022-07-13 16:23:33,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:33,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:23:33,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:23:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:23:33,828 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 16:23:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:34,002 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-13 16:23:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:23:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-07-13 16:23:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:34,003 INFO L225 Difference]: With dead ends: 60 [2022-07-13 16:23:34,003 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 16:23:34,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:23:34,004 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:34,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 120 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:23:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 16:23:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-07-13 16:23:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 16:23:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-13 16:23:34,011 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-07-13 16:23:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:34,011 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-13 16:23:34,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 16:23:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-13 16:23:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 16:23:34,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:34,012 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:34,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:34,227 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 [2022-07-13 16:23:34,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-07-13 16:23:34,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16075260] [2022-07-13 16:23:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:34,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010504567] [2022-07-13 16:23:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:34,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:34,250 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) [2022-07-13 16:23:34,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:23:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:23:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-13 16:23:34,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-13 16:23:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16075260] [2022-07-13 16:23:34,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010504567] [2022-07-13 16:23:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010504567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:23:34,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:23:34,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-13 16:23:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538324305] [2022-07-13 16:23:34,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:23:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:23:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:23:34,402 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 16:23:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:34,559 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-07-13 16:23:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 16:23:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-07-13 16:23:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:34,562 INFO L225 Difference]: With dead ends: 102 [2022-07-13 16:23:34,563 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 16:23:34,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:23:34,564 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:34,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 195 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:23:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 16:23:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-13 16:23:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-13 16:23:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-07-13 16:23:34,590 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-07-13 16:23:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-07-13 16:23:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 16:23:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-07-13 16:23:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 16:23:34,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:34,596 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:34,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:34,811 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 [2022-07-13 16:23:34,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-07-13 16:23:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932186528] [2022-07-13 16:23:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:34,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457475469] [2022-07-13 16:23:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:34,822 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) [2022-07-13 16:23:34,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:23:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 16:23:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 16:23:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 16:23:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932186528] [2022-07-13 16:23:35,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:35,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457475469] [2022-07-13 16:23:35,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457475469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:23:35,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:23:35,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-13 16:23:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866228212] [2022-07-13 16:23:35,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:35,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:23:35,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:23:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:23:35,057 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-13 16:23:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:35,302 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-07-13 16:23:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:23:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2022-07-13 16:23:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:35,304 INFO L225 Difference]: With dead ends: 128 [2022-07-13 16:23:35,304 INFO L226 Difference]: Without dead ends: 124 [2022-07-13 16:23:35,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-13 16:23:35,305 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:35,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 165 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:23:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-13 16:23:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-07-13 16:23:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 16:23:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-07-13 16:23:35,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-07-13 16:23:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:35,317 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-07-13 16:23:35,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-13 16:23:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-07-13 16:23:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 16:23:35,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:35,318 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:35,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:35,534 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 [2022-07-13 16:23:35,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-07-13 16:23:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:35,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904098702] [2022-07-13 16:23:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:35,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540268604] [2022-07-13 16:23:35,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:23:35,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:35,545 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) [2022-07-13 16:23:35,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 16:23:35,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:23:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:23:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 16:23:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-13 16:23:35,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 16:23:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904098702] [2022-07-13 16:23:35,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540268604] [2022-07-13 16:23:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540268604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:23:35,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:23:35,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-07-13 16:23:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277891960] [2022-07-13 16:23:35,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:23:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:23:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:23:35,959 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-13 16:23:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:37,087 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2022-07-13 16:23:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 16:23:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 76 [2022-07-13 16:23:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:37,097 INFO L225 Difference]: With dead ends: 116 [2022-07-13 16:23:37,097 INFO L226 Difference]: Without dead ends: 114 [2022-07-13 16:23:37,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-07-13 16:23:37,099 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:37,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 156 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 16:23:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-13 16:23:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-07-13 16:23:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 16:23:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2022-07-13 16:23:37,112 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 76 [2022-07-13 16:23:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:37,112 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2022-07-13 16:23:37,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-13 16:23:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2022-07-13 16:23:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 16:23:37,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:37,113 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:37,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:37,328 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 [2022-07-13 16:23:37,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-07-13 16:23:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216785992] [2022-07-13 16:23:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:37,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234710] [2022-07-13 16:23:37,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:23:37,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:37,347 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) [2022-07-13 16:23:37,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 16:23:37,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 16:23:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:23:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 16:23:37,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-13 16:23:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:38,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216785992] [2022-07-13 16:23:38,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234710] [2022-07-13 16:23:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:38,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:38,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-13 16:23:38,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397732756] [2022-07-13 16:23:38,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:38,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 16:23:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 16:23:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-13 16:23:38,153 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-13 16:23:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:38,897 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-07-13 16:23:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 16:23:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-07-13 16:23:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:38,898 INFO L225 Difference]: With dead ends: 128 [2022-07-13 16:23:38,898 INFO L226 Difference]: Without dead ends: 126 [2022-07-13 16:23:38,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-13 16:23:38,899 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:38,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 143 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 16:23:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-13 16:23:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-07-13 16:23:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 16:23:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-07-13 16:23:38,913 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2022-07-13 16:23:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:38,913 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-07-13 16:23:38,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-13 16:23:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-07-13 16:23:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 16:23:38,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:38,914 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:38,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:39,134 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 [2022-07-13 16:23:39,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-07-13 16:23:39,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:39,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886813672] [2022-07-13 16:23:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:39,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:39,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:39,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852894169] [2022-07-13 16:23:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:39,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:39,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:39,144 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) [2022-07-13 16:23:39,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 16:23:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 16:23:39,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-13 16:23:39,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886813672] [2022-07-13 16:23:39,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852894169] [2022-07-13 16:23:39,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852894169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:39,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:39,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-13 16:23:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903582087] [2022-07-13 16:23:39,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:23:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:23:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:23:39,652 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:23:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:40,003 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2022-07-13 16:23:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:23:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2022-07-13 16:23:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:40,005 INFO L225 Difference]: With dead ends: 163 [2022-07-13 16:23:40,005 INFO L226 Difference]: Without dead ends: 156 [2022-07-13 16:23:40,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-13 16:23:40,007 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:40,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 228 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:23:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-13 16:23:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-07-13 16:23:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 50 states have call successors, (50), 13 states have call predecessors, (50), 13 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-07-13 16:23:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2022-07-13 16:23:40,026 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 87 [2022-07-13 16:23:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:40,026 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2022-07-13 16:23:40,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:23:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2022-07-13 16:23:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 16:23:40,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:40,027 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:40,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:40,243 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 [2022-07-13 16:23:40,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-07-13 16:23:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987453474] [2022-07-13 16:23:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:40,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:40,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983437541] [2022-07-13 16:23:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:40,255 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) [2022-07-13 16:23:40,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 16:23:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:23:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 16:23:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-13 16:23:40,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:41,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987453474] [2022-07-13 16:23:41,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:41,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983437541] [2022-07-13 16:23:41,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983437541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:23:41,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:23:41,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-13 16:23:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448844463] [2022-07-13 16:23:41,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:41,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:23:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:41,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:23:41,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-13 16:23:41,009 INFO L87 Difference]: Start difference. First operand 146 states and 194 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-13 16:23:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:41,504 INFO L93 Difference]: Finished difference Result 162 states and 211 transitions. [2022-07-13 16:23:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:23:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 103 [2022-07-13 16:23:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:41,506 INFO L225 Difference]: With dead ends: 162 [2022-07-13 16:23:41,506 INFO L226 Difference]: Without dead ends: 160 [2022-07-13 16:23:41,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:23:41,507 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:41,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 207 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 16:23:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-13 16:23:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2022-07-13 16:23:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 87 states have internal predecessors, (98), 50 states have call successors, (50), 14 states have call predecessors, (50), 14 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-07-13 16:23:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-07-13 16:23:41,529 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 103 [2022-07-13 16:23:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:41,537 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-07-13 16:23:41,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-13 16:23:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-07-13 16:23:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 16:23:41,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:41,538 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:41,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:41,747 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 [2022-07-13 16:23:41,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2022-07-13 16:23:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099276606] [2022-07-13 16:23:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:41,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:41,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153868369] [2022-07-13 16:23:41,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 16:23:41,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:41,756 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) [2022-07-13 16:23:41,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 16:23:41,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 16:23:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:23:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:23:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-13 16:23:41,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:23:41,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099276606] [2022-07-13 16:23:41,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153868369] [2022-07-13 16:23:41,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153868369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:23:41,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:23:41,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:23:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580040427] [2022-07-13 16:23:41,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:23:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:23:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:23:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:23:41,820 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-13 16:23:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:23:41,876 INFO L93 Difference]: Finished difference Result 200 states and 265 transitions. [2022-07-13 16:23:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:23:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2022-07-13 16:23:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:23:41,877 INFO L225 Difference]: With dead ends: 200 [2022-07-13 16:23:41,877 INFO L226 Difference]: Without dead ends: 144 [2022-07-13 16:23:41,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:23:41,878 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:23:41,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:23:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-13 16:23:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2022-07-13 16:23:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-13 16:23:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2022-07-13 16:23:41,893 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 106 [2022-07-13 16:23:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:23:41,893 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2022-07-13 16:23:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-13 16:23:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2022-07-13 16:23:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 16:23:41,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:23:41,894 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:23:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 16:23:42,103 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 [2022-07-13 16:23:42,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:23:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:23:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -200374723, now seen corresponding path program 2 times [2022-07-13 16:23:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:23:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708866389] [2022-07-13 16:23:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:23:42,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:23:42,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:23:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113397976] [2022-07-13 16:23:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:23:42,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:23:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:23:42,112 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) [2022-07-13 16:23:42,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 16:23:42,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:23:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:23:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 16:23:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:23:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 16:23:43,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:23:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-13 16:23:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:23:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708866389] [2022-07-13 16:23:49,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:23:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113397976] [2022-07-13 16:23:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113397976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:23:49,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:23:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-07-13 16:23:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020836210] [2022-07-13 16:23:49,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:23:49,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 16:23:49,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:23:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 16:23:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=418, Unknown=2, NotChecked=0, Total=506 [2022-07-13 16:23:49,183 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-13 16:23:52,319 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse0 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse2 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (and (or (not (= |c_ULTIMATE.start_main_~b~0#1| 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 0)) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* |c_ULTIMATE.start_main_~x~0#1| (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| 0)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (or .cse0 (not (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| .cse2) (* |c_ULTIMATE.start_main_~x~0#1| .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse3 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse3)) (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse3 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse3 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse4 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse2)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) 0) .cse0 (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse2 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|))))) is different from true [2022-07-13 16:23:56,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:23:58,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:00,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:02,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:04,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:06,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:08,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:10,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:13,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:15,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:17,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:19,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:21,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:23,401 WARN L855 $PredicateComparison]: unable to prove that (and (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse0)) (<= (* 2 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse0 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse0 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse1 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (let ((.cse2 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse2)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) 0) (<= |c_ULTIMATE.start_main_~b~0#1| 0) (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse2 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|))))) is different from true [2022-07-13 16:24:25,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:27,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:24:29,468 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse0 (<= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse2 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (and (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* |c_ULTIMATE.start_main_~x~0#1| (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| 0)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (or .cse0 (not (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| .cse2) (* |c_ULTIMATE.start_main_~x~0#1| .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse3 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse3)) (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse3 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse3 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse4 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse2)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) 0) .cse0 (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse2 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|))))) is different from true [2022-07-13 16:24:31,928 WARN L855 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_main_~b~0#1| 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 0)) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse0)) (<= (* 2 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (= (+ (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse0 |c_ULTIMATE.start_main_~q~0#1|))) (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* .cse0 |c_ULTIMATE.start_main_~s~0#1|))))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse1 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (let ((.cse2 (div |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| .cse2)) |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~p~0#1| (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|)))) 0) (<= |c_ULTIMATE.start_main_~b~0#1| 0) (not (= (mod |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 0)) (< .cse2 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~b~0#1|)) |c_ULTIMATE.start_main_~b~0#1|)))) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* |c_ULTIMATE.start_main_~x~0#1| (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) 0) (not (= |c_ULTIMATE.start_main_~c~0#1| 0)))) is different from true [2022-07-13 16:24:46,201 WARN L233 SmtUtils]: Spent 13.99s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:24:51,596 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:24:58,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:25:00,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:25:25,983 WARN L233 SmtUtils]: Spent 20.41s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:25:46,899 WARN L233 SmtUtils]: Spent 18.04s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:25:49,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:25:55,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:25:57,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:25:59,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:26:01,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:26:03,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:26:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:26:10,222 INFO L93 Difference]: Finished difference Result 196 states and 263 transitions. [2022-07-13 16:26:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 16:26:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) Word has length 109 [2022-07-13 16:26:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:26:10,224 INFO L225 Difference]: With dead ends: 196 [2022-07-13 16:26:10,224 INFO L226 Difference]: Without dead ends: 188 [2022-07-13 16:26:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=374, Invalid=1611, Unknown=11, NotChecked=356, Total=2352 [2022-07-13 16:26:10,225 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 62 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 168 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 52.8s IncrementalHoareTripleChecker+Time [2022-07-13 16:26:10,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 313 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 928 Invalid, 23 Unknown, 16 Unchecked, 52.8s Time] [2022-07-13 16:26:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-13 16:26:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2022-07-13 16:26:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 97 states have (on average 1.134020618556701) internal successors, (110), 98 states have internal predecessors, (110), 67 states have call successors, (67), 15 states have call predecessors, (67), 15 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-13 16:26:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2022-07-13 16:26:10,260 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 109 [2022-07-13 16:26:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:26:10,260 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2022-07-13 16:26:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-13 16:26:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2022-07-13 16:26:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 16:26:10,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:26:10,262 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:26:10,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 16:26:10,462 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 [2022-07-13 16:26:10,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:26:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:26:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1760442774, now seen corresponding path program 3 times [2022-07-13 16:26:10,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:26:10,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247458949] [2022-07-13 16:26:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:26:10,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:26:10,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:26:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968424672] [2022-07-13 16:26:10,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:26:10,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:26:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:26:10,470 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) [2022-07-13 16:26:10,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 16:26:10,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 16:26:10,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:26:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:26:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:26:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-13 16:26:10,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:26:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-13 16:26:10,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:26:10,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247458949] [2022-07-13 16:26:10,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:26:10,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968424672] [2022-07-13 16:26:10,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968424672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:26:10,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:26:10,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-13 16:26:10,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135007238] [2022-07-13 16:26:10,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:26:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 16:26:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:26:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 16:26:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:26:10,604 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-13 16:26:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:26:10,818 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-07-13 16:26:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:26:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 112 [2022-07-13 16:26:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:26:10,819 INFO L225 Difference]: With dead ends: 225 [2022-07-13 16:26:10,820 INFO L226 Difference]: Without dead ends: 218 [2022-07-13 16:26:10,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-13 16:26:10,820 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 14 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:26:10,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 253 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:26:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-13 16:26:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2022-07-13 16:26:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 100 states have internal predecessors, (113), 71 states have call successors, (71), 15 states have call predecessors, (71), 15 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-13 16:26:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 254 transitions. [2022-07-13 16:26:10,848 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 254 transitions. Word has length 112 [2022-07-13 16:26:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:26:10,848 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 254 transitions. [2022-07-13 16:26:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-13 16:26:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 254 transitions. [2022-07-13 16:26:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-13 16:26:10,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:26:10,850 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:26:10,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 16:26:11,056 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 [2022-07-13 16:26:11,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:26:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:26:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2022-07-13 16:26:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:26:11,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014279707] [2022-07-13 16:26:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:26:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:26:11,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:26:11,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194904968] [2022-07-13 16:26:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:26:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:26:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:26:11,078 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) [2022-07-13 16:26:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 16:26:11,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:26:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:26:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 16:26:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:26:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 123 proven. 50 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-07-13 16:26:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:26:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 127 proven. 32 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-07-13 16:26:22,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:26:22,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014279707] [2022-07-13 16:26:22,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:26:22,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194904968] [2022-07-13 16:26:22,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194904968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:26:22,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:26:22,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-13 16:26:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488415182] [2022-07-13 16:26:22,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:26:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 16:26:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:26:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 16:26:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:26:22,845 INFO L87 Difference]: Start difference. First operand 186 states and 254 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-13 16:26:26,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:26:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:26:29,872 INFO L93 Difference]: Finished difference Result 220 states and 296 transitions. [2022-07-13 16:26:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 16:26:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) Word has length 125 [2022-07-13 16:26:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:26:29,874 INFO L225 Difference]: With dead ends: 220 [2022-07-13 16:26:29,874 INFO L226 Difference]: Without dead ends: 216 [2022-07-13 16:26:29,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 225 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2022-07-13 16:26:29,874 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 69 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 147 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:26:29,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 243 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 709 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-07-13 16:26:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-13 16:26:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-13 16:26:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 79 states have call successors, (79), 18 states have call predecessors, (79), 17 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-13 16:26:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 283 transitions. [2022-07-13 16:26:29,926 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 283 transitions. Word has length 125 [2022-07-13 16:26:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:26:29,926 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 283 transitions. [2022-07-13 16:26:29,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-13 16:26:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 283 transitions. [2022-07-13 16:26:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 16:26:29,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:26:29,928 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:26:29,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 16:26:30,143 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 [2022-07-13 16:26:30,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:26:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:26:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2022-07-13 16:26:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:26:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229712648] [2022-07-13 16:26:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:26:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:26:30,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:26:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972536257] [2022-07-13 16:26:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 16:26:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:26:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:26:30,162 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) [2022-07-13 16:26:30,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 16:26:30,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 16:26:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:26:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-13 16:26:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:26:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 151 proven. 124 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-13 16:26:32,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:26:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 180 proven. 63 refuted. 12 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-13 16:26:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:26:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229712648] [2022-07-13 16:26:49,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:26:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972536257] [2022-07-13 16:26:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972536257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:26:49,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:26:49,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-07-13 16:26:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286423204] [2022-07-13 16:26:49,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:26:49,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 16:26:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:26:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 16:26:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=715, Unknown=7, NotChecked=0, Total=870 [2022-07-13 16:26:49,348 INFO L87 Difference]: Start difference. First operand 208 states and 283 transitions. Second operand has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 24 states have internal predecessors, (55), 17 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-07-13 16:27:59,474 WARN L233 SmtUtils]: Spent 1.14m on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)