./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:00:55,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:00:55,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:00:55,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:00:55,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:00:55,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:00:55,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:00:55,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:00:55,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:00:55,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:00:55,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:00:55,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:00:55,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:00:55,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:00:55,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:00:55,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:00:55,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:00:55,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:00:55,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:00:55,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:00:55,635 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:00:55,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:00:55,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:00:55,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:00:55,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:00:55,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:00:55,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:00:55,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:00:55,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:00:55,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:00:55,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:00:55,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:00:55,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:00:55,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:00:55,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:00:55,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:00:55,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:00:55,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:00:55,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:00:55,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:00:55,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:00:55,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:00:55,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:00:55,685 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:00:55,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:00:55,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:00:55,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:00:55,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:00:55,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:00:55,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:00:55,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:00:55,688 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:00:55,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:00:55,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:00:55,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:00:55,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:00:55,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:00:55,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:00:55,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:00:55,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:00:55,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:00:55,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:00:55,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:00:55,692 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:00:55,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:00:55,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:00:55,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2022-07-21 03:00:55,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:00:55,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:00:56,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:00:56,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:00:56,003 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:00:56,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-07-21 03:00:56,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff273e7d8/685b223f5c284821bc062a96b167fa94/FLAG065d19bfa [2022-07-21 03:00:56,448 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:00:56,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-07-21 03:00:56,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff273e7d8/685b223f5c284821bc062a96b167fa94/FLAG065d19bfa [2022-07-21 03:00:56,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff273e7d8/685b223f5c284821bc062a96b167fa94 [2022-07-21 03:00:56,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:00:56,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:00:56,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:00:56,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:00:56,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:00:56,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:00:56" (1/1) ... [2022-07-21 03:00:56,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84821bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:56, skipping insertion in model container [2022-07-21 03:00:56,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:00:56" (1/1) ... [2022-07-21 03:00:56,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:00:56,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:00:57,002 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/egcd2-ll.c[490,503] [2022-07-21 03:00:57,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:00:57,026 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:00:57,035 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/egcd2-ll.c[490,503] [2022-07-21 03:00:57,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:00:57,061 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:00:57,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57 WrapperNode [2022-07-21 03:00:57,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:00:57,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:00:57,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:00:57,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:00:57,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,107 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-07-21 03:00:57,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:00:57,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:00:57,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:00:57,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:00:57,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:00:57,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:00:57,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:00:57,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:00:57,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (1/1) ... [2022-07-21 03:00:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:00:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:00:57,165 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) [2022-07-21 03:00:57,170 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 [2022-07-21 03:00:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:00:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:00:57,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:00:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:00:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:00:57,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:00:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:00:57,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:00:57,260 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:00:57,261 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:00:57,351 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:00:57,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:00:57,355 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 03:00:57,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:00:57 BoogieIcfgContainer [2022-07-21 03:00:57,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:00:57,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:00:57,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:00:57,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:00:57,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:00:56" (1/3) ... [2022-07-21 03:00:57,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@984a9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:00:57, skipping insertion in model container [2022-07-21 03:00:57,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:00:57" (2/3) ... [2022-07-21 03:00:57,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@984a9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:00:57, skipping insertion in model container [2022-07-21 03:00:57,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:00:57" (3/3) ... [2022-07-21 03:00:57,361 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-07-21 03:00:57,369 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:00:57,370 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:00:57,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:00:57,422 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@4b9f6f9e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9b0d9f7 [2022-07-21 03:00:57,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:00:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 03:00:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 03:00:57,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:57,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:00:57,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:00:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:00:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2022-07-21 03:00:57,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:00:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101534178] [2022-07-21 03:00:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:00:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:00:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 03:00:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 03:00:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 03:00:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:00:57,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:00:57,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101534178] [2022-07-21 03:00:57,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101534178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:00:57,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:00:57,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:00:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222747267] [2022-07-21 03:00:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:00:57,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:00:57,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:00:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:00:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:00:57,640 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:00:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:00:57,661 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2022-07-21 03:00:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:00:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-21 03:00:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:00:57,668 INFO L225 Difference]: With dead ends: 61 [2022-07-21 03:00:57,668 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 03:00:57,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:00:57,673 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:00:57,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:00:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 03:00:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 03:00:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:00:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-21 03:00:57,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2022-07-21 03:00:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:00:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-21 03:00:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:00:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-21 03:00:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 03:00:57,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:57,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:00:57,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:00:57,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:00:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:00:57,709 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2022-07-21 03:00:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:00:57,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127882838] [2022-07-21 03:00:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:00:57,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:00:57,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575591257] [2022-07-21 03:00:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:57,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:00:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:00:57,749 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) [2022-07-21 03:00:57,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:00:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:00:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:00:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:00:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:00:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:00:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:00:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127882838] [2022-07-21 03:00:58,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:00:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575591257] [2022-07-21 03:00:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575591257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:00:58,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:00:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-21 03:00:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164572728] [2022-07-21 03:00:58,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:00:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 03:00:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:00:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 03:00:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:00:58,075 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:00:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:00:58,174 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-07-21 03:00:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:00:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-21 03:00:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:00:58,175 INFO L225 Difference]: With dead ends: 45 [2022-07-21 03:00:58,175 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 03:00:58,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:00:58,176 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:00:58,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:00:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 03:00:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-21 03:00:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:00:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-21 03:00:58,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2022-07-21 03:00:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:00:58,183 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-21 03:00:58,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:00:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-21 03:00:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 03:00:58,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:58,184 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:00:58,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 03:00:58,393 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 [2022-07-21 03:00:58,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:00:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:00:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2022-07-21 03:00:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:00:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493648431] [2022-07-21 03:00:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:00:58,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:00:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752495847] [2022-07-21 03:00:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:00:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:00:58,428 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) [2022-07-21 03:00:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:00:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:58,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 03:00:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:00:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:00:58,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:00:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:00:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:00:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493648431] [2022-07-21 03:00:58,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:00:58,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752495847] [2022-07-21 03:00:58,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752495847] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:00:58,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:00:58,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:00:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620509975] [2022-07-21 03:00:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:00:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:00:58,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:00:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:00:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:00:58,652 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:00:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:00:58,697 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-07-21 03:00:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:00:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-07-21 03:00:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:00:58,710 INFO L225 Difference]: With dead ends: 36 [2022-07-21 03:00:58,710 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 03:00:58,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:00:58,712 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 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 [2022-07-21 03:00:58,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:00:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 03:00:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-21 03:00:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:00:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-21 03:00:58,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2022-07-21 03:00:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:00:58,718 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-21 03:00:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:00:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-21 03:00:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 03:00:58,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:58,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:00:58,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 03:00:58,939 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 [2022-07-21 03:00:58,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:00:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:00:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2022-07-21 03:00:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:00:58,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593873582] [2022-07-21 03:00:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:00:58,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:00:58,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44303496] [2022-07-21 03:00:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:00:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:00:58,953 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) [2022-07-21 03:00:58,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:00:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:00:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:00:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:00:59,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:00:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:00:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:00:59,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593873582] [2022-07-21 03:00:59,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:00:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44303496] [2022-07-21 03:00:59,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44303496] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:00:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:00:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:00:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193172020] [2022-07-21 03:00:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:00:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:00:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:00:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:00:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:00:59,300 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:00:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:00:59,366 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-07-21 03:00:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:00:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-07-21 03:00:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:00:59,369 INFO L225 Difference]: With dead ends: 47 [2022-07-21 03:00:59,369 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 03:00:59,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:00:59,373 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 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 [2022-07-21 03:00:59,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:00:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 03:00:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-21 03:00:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:00:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-07-21 03:00:59,388 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2022-07-21 03:00:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:00:59,388 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-07-21 03:00:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:00:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-07-21 03:00:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 03:00:59,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:59,391 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:00:59,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 03:00:59,626 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 [2022-07-21 03:00:59,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:00:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:00:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2022-07-21 03:00:59,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:00:59,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557538823] [2022-07-21 03:00:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:00:59,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:00:59,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920087025] [2022-07-21 03:00:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:00:59,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:00:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:00:59,676 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) [2022-07-21 03:00:59,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:00:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:00:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:00:59,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:00:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:00:59,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:00:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:00:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:00:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557538823] [2022-07-21 03:00:59,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:00:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920087025] [2022-07-21 03:00:59,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920087025] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:00:59,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:00:59,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:00:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384861442] [2022-07-21 03:00:59,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:00:59,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:00:59,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:00:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:00:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:00:59,907 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:00:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:00:59,950 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-07-21 03:00:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:00:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-07-21 03:00:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:00:59,951 INFO L225 Difference]: With dead ends: 51 [2022-07-21 03:00:59,951 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 03:00:59,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:00:59,952 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:00:59,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:00:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 03:00:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-21 03:00:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:00:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-21 03:00:59,958 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2022-07-21 03:00:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:00:59,958 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-21 03:00:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:00:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-21 03:00:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 03:00:59,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:00:59,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 03:00:59,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:01:00,176 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 [2022-07-21 03:01:00,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2022-07-21 03:01:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752005588] [2022-07-21 03:01:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:00,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664581173] [2022-07-21 03:01:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:00,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:00,199 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) [2022-07-21 03:01:00,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:01:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:01:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 03:01:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 03:01:00,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:00,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752005588] [2022-07-21 03:01:00,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:00,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664581173] [2022-07-21 03:01:00,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664581173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:01:00,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:01:00,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-21 03:01:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474444350] [2022-07-21 03:01:00,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:00,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 03:01:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 03:01:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:01:00,524 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:01:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:00,617 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-07-21 03:01:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 03:01:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-07-21 03:01:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:00,619 INFO L225 Difference]: With dead ends: 55 [2022-07-21 03:01:00,619 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 03:01:00,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:01:00,620 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:01:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 03:01:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-21 03:01:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:01:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-21 03:01:00,626 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2022-07-21 03:01:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:00,626 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-21 03:01:00,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:01:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-21 03:01:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 03:01:00,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:00,628 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:01:00,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:01:00,844 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 [2022-07-21 03:01:00,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2022-07-21 03:01:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985422314] [2022-07-21 03:01:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:00,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31871244] [2022-07-21 03:01:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:00,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:00,868 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) [2022-07-21 03:01:00,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:01:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:01:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:01:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 03:01:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 03:01:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:01,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985422314] [2022-07-21 03:01:01,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:01,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31871244] [2022-07-21 03:01:01,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31871244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:01:01,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:01:01,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 03:01:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980925140] [2022-07-21 03:01:01,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:01,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:01:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:01:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:01:01,013 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:01:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:01,161 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-21 03:01:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 03:01:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2022-07-21 03:01:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:01,163 INFO L225 Difference]: With dead ends: 99 [2022-07-21 03:01:01,163 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 03:01:01,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:01:01,164 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:01,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 250 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:01:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 03:01:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-07-21 03:01:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-21 03:01:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2022-07-21 03:01:01,176 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2022-07-21 03:01:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:01,176 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2022-07-21 03:01:01,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:01:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2022-07-21 03:01:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 03:01:01,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:01,177 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-07-21 03:01:01,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 03:01:01,400 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 [2022-07-21 03:01:01,400 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2022-07-21 03:01:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:01,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373369097] [2022-07-21 03:01:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:01,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:01,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892142627] [2022-07-21 03:01:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:01,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:01,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:01,420 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) [2022-07-21 03:01:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:01:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:01:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 03:01:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 03:01:01,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 03:01:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373369097] [2022-07-21 03:01:01,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892142627] [2022-07-21 03:01:01,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892142627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:01:01,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:01:01,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-21 03:01:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635927414] [2022-07-21 03:01:01,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 03:01:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 03:01:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:01:01,662 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-21 03:01:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:01,961 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2022-07-21 03:01:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 03:01:01,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2022-07-21 03:01:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:01,965 INFO L225 Difference]: With dead ends: 125 [2022-07-21 03:01:01,965 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 03:01:01,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-21 03:01:01,966 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:01,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:01:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 03:01:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2022-07-21 03:01:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-21 03:01:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-07-21 03:01:02,004 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2022-07-21 03:01:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:02,004 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-07-21 03:01:02,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-21 03:01:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-07-21 03:01:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 03:01:02,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:02,008 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:01:02,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:01:02,226 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 [2022-07-21 03:01:02,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2022-07-21 03:01:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:02,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423806909] [2022-07-21 03:01:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:02,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:02,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:02,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141768796] [2022-07-21 03:01:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:01:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:02,235 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) [2022-07-21 03:01:02,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:01:02,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:01:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:01:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 03:01:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 03:01:02,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-21 03:01:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423806909] [2022-07-21 03:01:02,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141768796] [2022-07-21 03:01:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141768796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:01:02,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:01:02,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-07-21 03:01:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422913269] [2022-07-21 03:01:02,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:01:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:01:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:01:02,603 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-07-21 03:01:05,387 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 [] [2022-07-21 03:01:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:07,025 INFO L93 Difference]: Finished difference Result 233 states and 345 transitions. [2022-07-21 03:01:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 03:01:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 65 [2022-07-21 03:01:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:07,034 INFO L225 Difference]: With dead ends: 233 [2022-07-21 03:01:07,034 INFO L226 Difference]: Without dead ends: 231 [2022-07-21 03:01:07,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-07-21 03:01:07,036 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 112 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:07,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 229 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 447 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-21 03:01:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-21 03:01:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 222. [2022-07-21 03:01:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 116 states have (on average 1.25) internal successors, (145), 119 states have internal predecessors, (145), 95 states have call successors, (95), 10 states have call predecessors, (95), 10 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-21 03:01:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 334 transitions. [2022-07-21 03:01:07,085 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 334 transitions. Word has length 65 [2022-07-21 03:01:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:07,086 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 334 transitions. [2022-07-21 03:01:07,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-07-21 03:01:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 334 transitions. [2022-07-21 03:01:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 03:01:07,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:07,087 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:01:07,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:01:07,303 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 [2022-07-21 03:01:07,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2022-07-21 03:01:07,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:07,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476780969] [2022-07-21 03:01:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:07,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808495689] [2022-07-21 03:01:07,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:01:07,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:07,352 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) [2022-07-21 03:01:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:01:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 03:01:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:01:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 03:01:07,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-21 03:01:07,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:07,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476780969] [2022-07-21 03:01:07,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808495689] [2022-07-21 03:01:07,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808495689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:01:07,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:01:07,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-21 03:01:07,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784932455] [2022-07-21 03:01:07,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:07,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 03:01:07,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 03:01:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-21 03:01:07,820 INFO L87 Difference]: Start difference. First operand 222 states and 334 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-21 03:01:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:08,157 INFO L93 Difference]: Finished difference Result 238 states and 347 transitions. [2022-07-21 03:01:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:01:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-07-21 03:01:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:08,168 INFO L225 Difference]: With dead ends: 238 [2022-07-21 03:01:08,168 INFO L226 Difference]: Without dead ends: 236 [2022-07-21 03:01:08,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-21 03:01:08,169 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:08,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 03:01:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-21 03:01:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-07-21 03:01:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 125 states have (on average 1.232) internal successors, (154), 128 states have internal predecessors, (154), 95 states have call successors, (95), 13 states have call predecessors, (95), 13 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-21 03:01:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 343 transitions. [2022-07-21 03:01:08,205 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 343 transitions. Word has length 70 [2022-07-21 03:01:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:08,205 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 343 transitions. [2022-07-21 03:01:08,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-21 03:01:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 343 transitions. [2022-07-21 03:01:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 03:01:08,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:08,207 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-07-21 03:01:08,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 03:01:08,419 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 [2022-07-21 03:01:08,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2022-07-21 03:01:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:08,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974291512] [2022-07-21 03:01:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:08,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:08,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:08,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209936517] [2022-07-21 03:01:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:08,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:08,430 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) [2022-07-21 03:01:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:01:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:01:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 03:01:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-21 03:01:08,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-21 03:01:09,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974291512] [2022-07-21 03:01:09,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:09,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209936517] [2022-07-21 03:01:09,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209936517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:01:09,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:01:09,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-07-21 03:01:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109811967] [2022-07-21 03:01:09,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:01:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:01:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:01:09,063 INFO L87 Difference]: Start difference. First operand 234 states and 343 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-21 03:01:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:01:11,058 INFO L93 Difference]: Finished difference Result 373 states and 564 transitions. [2022-07-21 03:01:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 03:01:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 76 [2022-07-21 03:01:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:01:11,071 INFO L225 Difference]: With dead ends: 373 [2022-07-21 03:01:11,073 INFO L226 Difference]: Without dead ends: 365 [2022-07-21 03:01:11,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-07-21 03:01:11,075 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 50 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 03:01:11,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 272 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 03:01:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-21 03:01:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 361. [2022-07-21 03:01:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 188 states have internal predecessors, (233), 157 states have call successors, (157), 16 states have call predecessors, (157), 16 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-07-21 03:01:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 546 transitions. [2022-07-21 03:01:11,149 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 546 transitions. Word has length 76 [2022-07-21 03:01:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:01:11,150 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 546 transitions. [2022-07-21 03:01:11,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-21 03:01:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 546 transitions. [2022-07-21 03:01:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 03:01:11,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:01:11,152 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2022-07-21 03:01:11,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:01:11,371 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 [2022-07-21 03:01:11,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:01:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:01:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2022-07-21 03:01:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:01:11,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240059576] [2022-07-21 03:01:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:01:11,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:01:11,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18346831] [2022-07-21 03:01:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:01:11,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:01:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:01:11,387 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) [2022-07-21 03:01:11,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:01:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:01:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 03:01:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:01:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-21 03:01:11,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:01:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 80 proven. 26 refuted. 6 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-21 03:01:30,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:01:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240059576] [2022-07-21 03:01:30,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:01:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18346831] [2022-07-21 03:01:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18346831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:01:30,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:01:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-07-21 03:01:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312281514] [2022-07-21 03:01:30,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:01:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 03:01:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:01:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 03:01:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=259, Unknown=4, NotChecked=0, Total=342 [2022-07-21 03:01:30,079 INFO L87 Difference]: Start difference. First operand 361 states and 546 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-21 03:01:58,367 WARN L233 SmtUtils]: Spent 24.29s on a formula simplification. DAG size of input: 81 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:02:00,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:02,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:07,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:09,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:11,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:14,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:02:16,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:03:01,970 WARN L233 SmtUtils]: Spent 36.44s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:03:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:03:02,204 INFO L93 Difference]: Finished difference Result 461 states and 701 transitions. [2022-07-21 03:03:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 03:03:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) Word has length 92 [2022-07-21 03:03:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:03:02,207 INFO L225 Difference]: With dead ends: 461 [2022-07-21 03:03:02,207 INFO L226 Difference]: Without dead ends: 459 [2022-07-21 03:03:02,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=172, Invalid=522, Unknown=8, NotChecked=0, Total=702 [2022-07-21 03:03:02,208 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 71 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 142 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:03:02,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 478 Invalid, 6 Unknown, 0 Unchecked, 18.1s Time] [2022-07-21 03:03:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-21 03:03:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 456. [2022-07-21 03:03:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 237 states have (on average 1.2447257383966244) internal successors, (295), 243 states have internal predecessors, (295), 201 states have call successors, (201), 17 states have call predecessors, (201), 17 states have return successors, (200), 195 states have call predecessors, (200), 200 states have call successors, (200) [2022-07-21 03:03:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 696 transitions. [2022-07-21 03:03:02,300 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 696 transitions. Word has length 92 [2022-07-21 03:03:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:03:02,301 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 696 transitions. [2022-07-21 03:03:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-21 03:03:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 696 transitions. [2022-07-21 03:03:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 03:03:02,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:03:02,302 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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] [2022-07-21 03:03:02,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:03:02,515 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 [2022-07-21 03:03:02,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:03:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:03:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -704441427, now seen corresponding path program 2 times [2022-07-21 03:03:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:03:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841758204] [2022-07-21 03:03:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:03:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:03:02,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:03:02,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872530632] [2022-07-21 03:03:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:03:02,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:03:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:03:02,527 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) [2022-07-21 03:03:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:03:02,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:03:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:03:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:03:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:03:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-07-21 03:03:02,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:03:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:03:02,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841758204] [2022-07-21 03:03:02,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:03:02,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872530632] [2022-07-21 03:03:02,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872530632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:03:02,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:03:02,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:03:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736314341] [2022-07-21 03:03:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:03:02,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:03:02,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:03:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:03:02,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:03:02,617 INFO L87 Difference]: Start difference. First operand 456 states and 696 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 03:03:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:03:02,745 INFO L93 Difference]: Finished difference Result 579 states and 875 transitions. [2022-07-21 03:03:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:03:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-07-21 03:03:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:03:02,746 INFO L225 Difference]: With dead ends: 579 [2022-07-21 03:03:02,747 INFO L226 Difference]: Without dead ends: 294 [2022-07-21 03:03:02,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:03:02,750 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:03:02,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:03:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-21 03:03:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-07-21 03:03:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 159 states have (on average 1.169811320754717) internal successors, (186), 162 states have internal predecessors, (186), 117 states have call successors, (117), 17 states have call predecessors, (117), 17 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2022-07-21 03:03:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 419 transitions. [2022-07-21 03:03:02,810 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 419 transitions. Word has length 101 [2022-07-21 03:03:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:03:02,810 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 419 transitions. [2022-07-21 03:03:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 03:03:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 419 transitions. [2022-07-21 03:03:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-21 03:03:02,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:03:02,813 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:03:02,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 03:03:03,031 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 [2022-07-21 03:03:03,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:03:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:03:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 3 times [2022-07-21 03:03:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:03:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647169674] [2022-07-21 03:03:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:03:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:03:03,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:03:03,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347043135] [2022-07-21 03:03:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:03:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:03:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:03:03,041 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) [2022-07-21 03:03:03,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 03:03:03,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 03:03:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:03:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 03:03:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:03:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 67 proven. 43 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-07-21 03:03:03,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:05:33,078 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)