./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:49:34,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:49:34,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:49:34,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:49:34,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:49:34,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:49:34,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:49:34,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:49:34,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:49:34,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:49:34,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:49:34,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:49:34,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:49:34,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:49:34,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:49:34,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:49:34,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:49:34,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:49:34,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:49:34,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:49:34,567 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:49:34,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:49:34,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:49:34,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:49:34,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:49:34,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:49:34,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:49:34,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:49:34,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:49:34,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:49:34,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:49:34,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:49:34,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:49:34,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:49:34,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:49:34,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:49:34,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:49:34,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:49:34,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:49:34,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:49:34,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:49:34,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:49:34,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:49:34,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:49:34,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:49:34,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:49:34,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:49:34,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:49:34,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:49:34,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:49:34,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:49:34,619 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:49:34,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:49:34,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:49:34,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:49:34,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:49:34,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:49:34,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:49:34,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:49:34,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:49:34,621 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:49:34,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:49:34,622 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:49:34,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:49:34,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:49:34,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:49:34,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:49:34,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:49:34,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:49:34,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:49:34,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:49:34,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:49:34,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:49:34,624 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:49:34,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:49:34,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:49:34,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2022-07-19 15:49:34,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:49:34,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:49:34,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:49:34,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:49:34,862 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:49:34,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-07-19 15:49:34,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3101fdfac/95e1b853f35c4239b04a8d3d39a76f04/FLAG0baab5065 [2022-07-19 15:49:35,258 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:49:35,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-07-19 15:49:35,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3101fdfac/95e1b853f35c4239b04a8d3d39a76f04/FLAG0baab5065 [2022-07-19 15:49:35,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3101fdfac/95e1b853f35c4239b04a8d3d39a76f04 [2022-07-19 15:49:35,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:49:35,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:49:35,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:49:35,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:49:35,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:49:35,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36bf3e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35, skipping insertion in model container [2022-07-19 15:49:35,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:49:35,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:49:35,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-07-19 15:49:35,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:49:35,881 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:49:35,890 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-07-19 15:49:35,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:49:35,908 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:49:35,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35 WrapperNode [2022-07-19 15:49:35,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:49:35,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:49:35,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:49:35,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:49:35,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,936 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-07-19 15:49:35,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:49:35,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:49:35,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:49:35,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:49:35,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:49:35,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:49:35,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:49:35,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:49:35,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (1/1) ... [2022-07-19 15:49:35,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:49:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:35,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:49:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:49:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:49:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:49:36,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:49:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:49:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:49:36,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:49:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:49:36,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:49:36,066 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:49:36,067 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:49:36,171 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:49:36,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:49:36,177 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 15:49:36,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:49:36 BoogieIcfgContainer [2022-07-19 15:49:36,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:49:36,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:49:36,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:49:36,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:49:36,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:49:35" (1/3) ... [2022-07-19 15:49:36,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c555ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:49:36, skipping insertion in model container [2022-07-19 15:49:36,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:49:35" (2/3) ... [2022-07-19 15:49:36,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c555ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:49:36, skipping insertion in model container [2022-07-19 15:49:36,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:49:36" (3/3) ... [2022-07-19 15:49:36,195 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2022-07-19 15:49:36,207 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:49:36,207 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:49:36,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:49:36,253 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@140d9282, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ed3a123 [2022-07-19 15:49:36,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:49:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 15:49:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:49:36,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:36,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:36,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-07-19 15:49:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361261529] [2022-07-19 15:49:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:49:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:36,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:49:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:36,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361261529] [2022-07-19 15:49:36,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361261529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:36,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:36,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:49:36,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028944824] [2022-07-19 15:49:36,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:36,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:49:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:49:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:49:36,510 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:49:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:36,541 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-07-19 15:49:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:49:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 15:49:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:36,551 INFO L225 Difference]: With dead ends: 67 [2022-07-19 15:49:36,551 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 15:49:36,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:49:36,565 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:36,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 15:49:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-19 15:49:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:49:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-07-19 15:49:36,612 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-07-19 15:49:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:36,612 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-07-19 15:49:36,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:49:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-07-19 15:49:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:49:36,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:36,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:36,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:49:36,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-07-19 15:49:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525774183] [2022-07-19 15:49:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:36,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651525837] [2022-07-19 15:49:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:36,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:36,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:36,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:49:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:36,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:49:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:36,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525774183] [2022-07-19 15:49:36,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651525837] [2022-07-19 15:49:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651525837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:36,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:36,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:49:36,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675110117] [2022-07-19 15:49:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:36,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:49:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:49:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:49:36,859 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:36,886 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-19 15:49:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:49:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:49:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:36,892 INFO L225 Difference]: With dead ends: 40 [2022-07-19 15:49:36,892 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 15:49:36,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:49:36,895 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:36,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 15:49:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 15:49:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:49:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-19 15:49:36,914 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-07-19 15:49:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:36,915 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-19 15:49:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-19 15:49:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 15:49:36,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:36,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:36,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:37,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-07-19 15:49:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:37,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850137290] [2022-07-19 15:49:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:37,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642603154] [2022-07-19 15:49:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:37,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:49:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:37,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:37,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850137290] [2022-07-19 15:49:37,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:37,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642603154] [2022-07-19 15:49:37,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642603154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:37,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:37,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:49:37,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039147993] [2022-07-19 15:49:37,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:49:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:49:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:37,277 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:37,347 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-07-19 15:49:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-19 15:49:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:37,348 INFO L225 Difference]: With dead ends: 53 [2022-07-19 15:49:37,348 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 15:49:37,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:49:37,350 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:37,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 128 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 15:49:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-07-19 15:49:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:49:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-07-19 15:49:37,357 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-07-19 15:49:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:37,358 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-07-19 15:49:37,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-07-19 15:49:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:49:37,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:37,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:37,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 15:49:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 15:49:37,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-07-19 15:49:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:37,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11704728] [2022-07-19 15:49:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:37,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577364904] [2022-07-19 15:49:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:37,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:37,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:37,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:49:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:49:37,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:37,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11704728] [2022-07-19 15:49:37,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577364904] [2022-07-19 15:49:37,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577364904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:37,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:37,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:49:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518034115] [2022-07-19 15:49:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:37,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:37,752 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:37,782 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-07-19 15:49:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-19 15:49:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:37,786 INFO L225 Difference]: With dead ends: 58 [2022-07-19 15:49:37,786 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 15:49:37,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:37,787 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:37,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 15:49:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-19 15:49:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:49:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-07-19 15:49:37,793 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-07-19 15:49:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:37,793 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-07-19 15:49:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-07-19 15:49:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:49:37,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:37,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:37,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:38,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-07-19 15:49:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543451065] [2022-07-19 15:49:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:38,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:38,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922695231] [2022-07-19 15:49:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:38,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:38,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:38,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:49:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:49:38,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:38,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543451065] [2022-07-19 15:49:38,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922695231] [2022-07-19 15:49:38,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922695231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:38,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:38,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 15:49:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403315796] [2022-07-19 15:49:38,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:38,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:49:38,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:49:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:49:38,229 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:38,308 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-07-19 15:49:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:49:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-19 15:49:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:38,309 INFO L225 Difference]: With dead ends: 54 [2022-07-19 15:49:38,309 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 15:49:38,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:49:38,310 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:38,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 183 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 15:49:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-19 15:49:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 15:49:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-07-19 15:49:38,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-07-19 15:49:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:38,335 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-07-19 15:49:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-07-19 15:49:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:49:38,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:38,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:38,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:49:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:38,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-07-19 15:49:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204934635] [2022-07-19 15:49:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:38,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:38,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:38,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778370489] [2022-07-19 15:49:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:38,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:38,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:38,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:38,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:49:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:38,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204934635] [2022-07-19 15:49:38,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778370489] [2022-07-19 15:49:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778370489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:38,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:38,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-19 15:49:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744106435] [2022-07-19 15:49:38,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:38,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:49:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:49:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:49:38,698 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:38,823 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-07-19 15:49:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:49:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-19 15:49:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:38,826 INFO L225 Difference]: With dead ends: 147 [2022-07-19 15:49:38,826 INFO L226 Difference]: Without dead ends: 140 [2022-07-19 15:49:38,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:49:38,827 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:38,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 201 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-19 15:49:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-07-19 15:49:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 15:49:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-07-19 15:49:38,851 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2022-07-19 15:49:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:38,852 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-07-19 15:49:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-07-19 15:49:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:49:38,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:38,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:38,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:39,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-07-19 15:49:39,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:39,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435111902] [2022-07-19 15:49:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:39,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:39,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208804681] [2022-07-19 15:49:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:39,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:39,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:49:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:49:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:39,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:39,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:39,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435111902] [2022-07-19 15:49:39,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208804681] [2022-07-19 15:49:39,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208804681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:39,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:39,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-19 15:49:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968139425] [2022-07-19 15:49:39,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:49:39,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:49:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:49:39,266 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:49:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:39,454 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-07-19 15:49:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:49:39,455 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-19 15:49:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:39,457 INFO L225 Difference]: With dead ends: 183 [2022-07-19 15:49:39,458 INFO L226 Difference]: Without dead ends: 171 [2022-07-19 15:49:39,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:49:39,459 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 113 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:39,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 277 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-19 15:49:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-07-19 15:49:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 15:49:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2022-07-19 15:49:39,491 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2022-07-19 15:49:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2022-07-19 15:49:39,492 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:49:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2022-07-19 15:49:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 15:49:39,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:39,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:39,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:39,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:39,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-07-19 15:49:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:39,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083354264] [2022-07-19 15:49:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:39,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:39,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261221000] [2022-07-19 15:49:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:39,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:39,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:39,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:49:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 15:49:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:40,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:40,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083354264] [2022-07-19 15:49:40,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:40,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261221000] [2022-07-19 15:49:40,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261221000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:40,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:40,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 15:49:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635552964] [2022-07-19 15:49:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:40,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:49:40,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:49:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:49:40,002 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:49:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:40,221 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2022-07-19 15:49:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:49:40,221 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-19 15:49:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:40,223 INFO L225 Difference]: With dead ends: 153 [2022-07-19 15:49:40,223 INFO L226 Difference]: Without dead ends: 151 [2022-07-19 15:49:40,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:49:40,224 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:40,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 211 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-19 15:49:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2022-07-19 15:49:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 15:49:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-07-19 15:49:40,245 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2022-07-19 15:49:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:40,245 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-07-19 15:49:40,246 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:49:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-07-19 15:49:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:49:40,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:40,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:40,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 15:49:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:40,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-07-19 15:49:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160738797] [2022-07-19 15:49:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:40,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:40,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319072449] [2022-07-19 15:49:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:40,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:40,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:40,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:49:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 15:49:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:49:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:40,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:40,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160738797] [2022-07-19 15:49:40,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:40,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319072449] [2022-07-19 15:49:40,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319072449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:40,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:40,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-07-19 15:49:40,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989488346] [2022-07-19 15:49:40,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:40,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:49:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:49:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:49:40,832 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:41,116 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-07-19 15:49:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:49:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-19 15:49:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:41,118 INFO L225 Difference]: With dead ends: 183 [2022-07-19 15:49:41,118 INFO L226 Difference]: Without dead ends: 181 [2022-07-19 15:49:41,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:49:41,119 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:41,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 317 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:49:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-19 15:49:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2022-07-19 15:49:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-19 15:49:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2022-07-19 15:49:41,139 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2022-07-19 15:49:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:41,140 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2022-07-19 15:49:41,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2022-07-19 15:49:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:49:41,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:41,143 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 15:49:41,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 15:49:41,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-07-19 15:49:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:41,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783936588] [2022-07-19 15:49:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:41,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:41,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670098668] [2022-07-19 15:49:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:41,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:41,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:49:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:41,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:41,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783936588] [2022-07-19 15:49:41,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670098668] [2022-07-19 15:49:41,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670098668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:41,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:41,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159687443] [2022-07-19 15:49:41,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:41,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:49:41,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:49:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:41,463 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:41,493 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-07-19 15:49:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:41,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-19 15:49:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:41,497 INFO L225 Difference]: With dead ends: 237 [2022-07-19 15:49:41,497 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 15:49:41,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:41,500 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:41,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 15:49:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-19 15:49:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-19 15:49:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2022-07-19 15:49:41,518 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2022-07-19 15:49:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:41,518 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2022-07-19 15:49:41,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2022-07-19 15:49:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:49:41,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:41,520 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:41,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:49:41,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-07-19 15:49:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:41,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927734218] [2022-07-19 15:49:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:41,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122600050] [2022-07-19 15:49:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:41,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:41,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:41,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:49:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:49:41,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:41,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:41,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927734218] [2022-07-19 15:49:41,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:41,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122600050] [2022-07-19 15:49:41,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122600050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:41,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:41,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12475317] [2022-07-19 15:49:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:41,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:41,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:41,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:41,845 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:41,904 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2022-07-19 15:49:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-19 15:49:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:41,906 INFO L225 Difference]: With dead ends: 235 [2022-07-19 15:49:41,906 INFO L226 Difference]: Without dead ends: 233 [2022-07-19 15:49:41,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:41,907 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 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 [2022-07-19 15:49:41,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-19 15:49:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2022-07-19 15:49:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-07-19 15:49:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2022-07-19 15:49:41,930 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2022-07-19 15:49:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:41,931 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2022-07-19 15:49:41,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2022-07-19 15:49:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:49:41,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:41,932 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 15:49:41,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 15:49:42,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-07-19 15:49:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360960248] [2022-07-19 15:49:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:42,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829814660] [2022-07-19 15:49:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:42,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:42,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:42,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:49:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:42,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 15:49:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360960248] [2022-07-19 15:49:42,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829814660] [2022-07-19 15:49:42,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829814660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:42,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:42,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 15:49:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051103108] [2022-07-19 15:49:42,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:49:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:49:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:49:42,442 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:49:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:43,674 INFO L93 Difference]: Finished difference Result 388 states and 574 transitions. [2022-07-19 15:49:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:49:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-19 15:49:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:43,677 INFO L225 Difference]: With dead ends: 388 [2022-07-19 15:49:43,677 INFO L226 Difference]: Without dead ends: 386 [2022-07-19 15:49:43,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:49:43,678 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 168 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:43,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 292 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 15:49:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-19 15:49:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 373. [2022-07-19 15:49:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 265 states have (on average 1.4264150943396225) internal successors, (378), 266 states have internal predecessors, (378), 91 states have call successors, (91), 16 states have call predecessors, (91), 16 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-07-19 15:49:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 559 transitions. [2022-07-19 15:49:43,725 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 559 transitions. Word has length 37 [2022-07-19 15:49:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:43,725 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 559 transitions. [2022-07-19 15:49:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:49:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 559 transitions. [2022-07-19 15:49:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:49:43,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:43,726 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:43,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:43,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 15:49:43,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-07-19 15:49:43,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:43,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199791631] [2022-07-19 15:49:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:43,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:43,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654462595] [2022-07-19 15:49:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:43,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:43,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:43,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:49:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:49:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:49:44,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:44,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:44,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199791631] [2022-07-19 15:49:44,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:44,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654462595] [2022-07-19 15:49:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654462595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:44,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085541679] [2022-07-19 15:49:44,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:44,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:44,042 INFO L87 Difference]: Start difference. First operand 373 states and 559 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-07-19 15:49:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:44,140 INFO L93 Difference]: Finished difference Result 562 states and 883 transitions. [2022-07-19 15:49:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2022-07-19 15:49:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:44,144 INFO L225 Difference]: With dead ends: 562 [2022-07-19 15:49:44,144 INFO L226 Difference]: Without dead ends: 560 [2022-07-19 15:49:44,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:44,147 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:44,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-19 15:49:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 491. [2022-07-19 15:49:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 306 states have (on average 1.4281045751633987) internal successors, (437), 326 states have internal predecessors, (437), 167 states have call successors, (167), 17 states have call predecessors, (167), 17 states have return successors, (166), 147 states have call predecessors, (166), 166 states have call successors, (166) [2022-07-19 15:49:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 770 transitions. [2022-07-19 15:49:44,223 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 770 transitions. Word has length 40 [2022-07-19 15:49:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:44,224 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 770 transitions. [2022-07-19 15:49:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-07-19 15:49:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 770 transitions. [2022-07-19 15:49:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:49:44,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:44,225 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:44,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 15:49:44,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-07-19 15:49:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896662601] [2022-07-19 15:49:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:44,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:44,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782116255] [2022-07-19 15:49:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:44,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:44,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:44,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:44,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:49:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:49:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:49:44,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:49:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896662601] [2022-07-19 15:49:44,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782116255] [2022-07-19 15:49:44,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782116255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:44,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:44,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-19 15:49:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462329917] [2022-07-19 15:49:44,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:49:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:49:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:49:44,639 INFO L87 Difference]: Start difference. First operand 491 states and 770 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:44,895 INFO L93 Difference]: Finished difference Result 1123 states and 1717 transitions. [2022-07-19 15:49:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:49:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-19 15:49:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:44,901 INFO L225 Difference]: With dead ends: 1123 [2022-07-19 15:49:44,901 INFO L226 Difference]: Without dead ends: 766 [2022-07-19 15:49:44,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:49:44,903 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 131 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 292 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-07-19 15:49:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 732. [2022-07-19 15:49:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 470 states have (on average 1.3638297872340426) internal successors, (641), 494 states have internal predecessors, (641), 222 states have call successors, (222), 39 states have call predecessors, (222), 39 states have return successors, (218), 198 states have call predecessors, (218), 218 states have call successors, (218) [2022-07-19 15:49:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1081 transitions. [2022-07-19 15:49:44,989 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1081 transitions. Word has length 38 [2022-07-19 15:49:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:44,989 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 1081 transitions. [2022-07-19 15:49:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1081 transitions. [2022-07-19 15:49:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:49:44,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:44,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:45,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 15:49:45,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2022-07-19 15:49:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:45,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056517550] [2022-07-19 15:49:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:45,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:45,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937174852] [2022-07-19 15:49:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:45,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:45,213 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:45,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:49:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:49:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:45,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:49:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056517550] [2022-07-19 15:49:45,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937174852] [2022-07-19 15:49:45,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937174852] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:45,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:45,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-19 15:49:45,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514865746] [2022-07-19 15:49:45,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:49:45,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:49:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:49:45,386 INFO L87 Difference]: Start difference. First operand 732 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:45,773 INFO L93 Difference]: Finished difference Result 1593 states and 2375 transitions. [2022-07-19 15:49:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 15:49:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-19 15:49:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:45,778 INFO L225 Difference]: With dead ends: 1593 [2022-07-19 15:49:45,778 INFO L226 Difference]: Without dead ends: 1115 [2022-07-19 15:49:45,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-07-19 15:49:45,780 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 286 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:45,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 390 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:49:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-07-19 15:49:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1068. [2022-07-19 15:49:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 696 states have (on average 1.3117816091954022) internal successors, (913), 729 states have internal predecessors, (913), 316 states have call successors, (316), 55 states have call predecessors, (316), 55 states have return successors, (310), 283 states have call predecessors, (310), 310 states have call successors, (310) [2022-07-19 15:49:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1539 transitions. [2022-07-19 15:49:45,918 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1539 transitions. Word has length 39 [2022-07-19 15:49:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:45,919 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1539 transitions. [2022-07-19 15:49:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:49:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1539 transitions. [2022-07-19 15:49:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:49:45,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:45,920 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:45,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:46,136 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash -827121215, now seen corresponding path program 2 times [2022-07-19 15:49:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:46,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610274825] [2022-07-19 15:49:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:46,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445014875] [2022-07-19 15:49:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:49:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:46,146 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:46,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:49:46,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:49:46,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:49:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:49:46,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610274825] [2022-07-19 15:49:46,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445014875] [2022-07-19 15:49:46,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445014875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:46,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:46,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724827203] [2022-07-19 15:49:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:46,221 INFO L87 Difference]: Start difference. First operand 1068 states and 1539 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:46,435 INFO L93 Difference]: Finished difference Result 1696 states and 2535 transitions. [2022-07-19 15:49:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-07-19 15:49:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:46,441 INFO L225 Difference]: With dead ends: 1696 [2022-07-19 15:49:46,441 INFO L226 Difference]: Without dead ends: 1230 [2022-07-19 15:49:46,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:49:46,443 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:46,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:49:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-07-19 15:49:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 991. [2022-07-19 15:49:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 659 states have (on average 1.3019726858877088) internal successors, (858), 689 states have internal predecessors, (858), 276 states have call successors, (276), 55 states have call predecessors, (276), 55 states have return successors, (270), 246 states have call predecessors, (270), 270 states have call successors, (270) [2022-07-19 15:49:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1404 transitions. [2022-07-19 15:49:46,568 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1404 transitions. Word has length 40 [2022-07-19 15:49:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:46,569 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1404 transitions. [2022-07-19 15:49:46,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:49:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1404 transitions. [2022-07-19 15:49:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 15:49:46,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:46,570 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:46,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:46,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 15:49:46,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-07-19 15:49:46,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:46,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592819406] [2022-07-19 15:49:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:46,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:46,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:46,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360578296] [2022-07-19 15:49:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:46,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:46,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:46,801 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:46,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:49:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 15:49:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:49:47,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:49:47,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:47,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592819406] [2022-07-19 15:49:47,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:47,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360578296] [2022-07-19 15:49:47,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360578296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:47,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:47,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-07-19 15:49:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559807542] [2022-07-19 15:49:47,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:47,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:49:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:49:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:49:47,792 INFO L87 Difference]: Start difference. First operand 991 states and 1404 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:49:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:54,367 INFO L93 Difference]: Finished difference Result 1352 states and 1914 transitions. [2022-07-19 15:49:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 15:49:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2022-07-19 15:49:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:54,373 INFO L225 Difference]: With dead ends: 1352 [2022-07-19 15:49:54,373 INFO L226 Difference]: Without dead ends: 1344 [2022-07-19 15:49:54,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:49:54,375 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 220 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 595 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-19 15:49:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-07-19 15:49:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1194. [2022-07-19 15:49:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 812 states have (on average 1.293103448275862) internal successors, (1050), 837 states have internal predecessors, (1050), 310 states have call successors, (310), 71 states have call predecessors, (310), 71 states have return successors, (306), 285 states have call predecessors, (306), 306 states have call successors, (306) [2022-07-19 15:49:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1666 transitions. [2022-07-19 15:49:54,556 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1666 transitions. Word has length 54 [2022-07-19 15:49:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:54,556 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1666 transitions. [2022-07-19 15:49:54,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:49:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1666 transitions. [2022-07-19 15:49:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 15:49:54,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:54,557 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:54,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:54,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 15:49:54,780 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2022-07-19 15:49:54,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:54,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413663757] [2022-07-19 15:49:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:54,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199871806] [2022-07-19 15:49:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:54,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:54,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:54,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:54,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:49:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:49:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 15:49:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 15:49:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:55,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413663757] [2022-07-19 15:49:55,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:55,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199871806] [2022-07-19 15:49:55,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199871806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:49:55,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:49:55,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-19 15:49:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40488361] [2022-07-19 15:49:55,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:49:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 15:49:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 15:49:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:49:55,086 INFO L87 Difference]: Start difference. First operand 1194 states and 1666 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 15:49:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:55,828 INFO L93 Difference]: Finished difference Result 2551 states and 3669 transitions. [2022-07-19 15:49:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 15:49:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-07-19 15:49:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:55,841 INFO L225 Difference]: With dead ends: 2551 [2022-07-19 15:49:55,841 INFO L226 Difference]: Without dead ends: 2529 [2022-07-19 15:49:55,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:49:55,842 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 381 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:55,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 476 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:49:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-07-19 15:49:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2397. [2022-07-19 15:49:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1640 states have (on average 1.3073170731707318) internal successors, (2144), 1710 states have internal predecessors, (2144), 641 states have call successors, (641), 115 states have call predecessors, (641), 115 states have return successors, (634), 571 states have call predecessors, (634), 634 states have call successors, (634) [2022-07-19 15:49:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3419 transitions. [2022-07-19 15:49:56,317 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3419 transitions. Word has length 60 [2022-07-19 15:49:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:56,318 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3419 transitions. [2022-07-19 15:49:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 15:49:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3419 transitions. [2022-07-19 15:49:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 15:49:56,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:56,319 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 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] [2022-07-19 15:49:56,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:56,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:49:56,548 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2022-07-19 15:49:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:56,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432942622] [2022-07-19 15:49:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:56,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:56,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:56,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231322197] [2022-07-19 15:49:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:56,560 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:56,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:49:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:49:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-19 15:49:56,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:49:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-19 15:49:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432942622] [2022-07-19 15:49:56,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231322197] [2022-07-19 15:49:56,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231322197] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:49:56,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:49:56,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-07-19 15:49:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252865196] [2022-07-19 15:49:56,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:49:56,795 INFO L87 Difference]: Start difference. First operand 2397 states and 3419 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-07-19 15:49:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:57,169 INFO L93 Difference]: Finished difference Result 2458 states and 3479 transitions. [2022-07-19 15:49:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:49:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 63 [2022-07-19 15:49:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:57,179 INFO L225 Difference]: With dead ends: 2458 [2022-07-19 15:49:57,180 INFO L226 Difference]: Without dead ends: 2456 [2022-07-19 15:49:57,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:49:57,181 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:57,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-07-19 15:49:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2433. [2022-07-19 15:49:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1667 states have (on average 1.3011397720455908) internal successors, (2169), 1737 states have internal predecessors, (2169), 641 states have call successors, (641), 124 states have call predecessors, (641), 124 states have return successors, (634), 571 states have call predecessors, (634), 634 states have call successors, (634) [2022-07-19 15:49:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3444 transitions. [2022-07-19 15:49:57,566 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3444 transitions. Word has length 63 [2022-07-19 15:49:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:57,566 INFO L495 AbstractCegarLoop]: Abstraction has 2433 states and 3444 transitions. [2022-07-19 15:49:57,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-07-19 15:49:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3444 transitions. [2022-07-19 15:49:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 15:49:57,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:57,568 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:57,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:57,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:57,791 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 1 times [2022-07-19 15:49:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421864431] [2022-07-19 15:49:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:57,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:57,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596792355] [2022-07-19 15:49:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:57,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:57,807 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:49:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:49:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:49:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:49:57,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:49:57,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:49:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421864431] [2022-07-19 15:49:57,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:49:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596792355] [2022-07-19 15:49:57,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596792355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:49:57,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:49:57,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:49:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843327966] [2022-07-19 15:49:57,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:49:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:49:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:49:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:49:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:49:57,898 INFO L87 Difference]: Start difference. First operand 2433 states and 3444 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 15:49:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:49:58,269 INFO L93 Difference]: Finished difference Result 4403 states and 6223 transitions. [2022-07-19 15:49:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:49:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-07-19 15:49:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:49:58,278 INFO L225 Difference]: With dead ends: 4403 [2022-07-19 15:49:58,278 INFO L226 Difference]: Without dead ends: 2613 [2022-07-19 15:49:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:49:58,283 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:49:58,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:49:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-07-19 15:49:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2417. [2022-07-19 15:49:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 1725 states have (on average 1.3014492753623188) internal successors, (2245), 1757 states have internal predecessors, (2245), 569 states have call successors, (569), 122 states have call predecessors, (569), 122 states have return successors, (562), 537 states have call predecessors, (562), 562 states have call successors, (562) [2022-07-19 15:49:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3376 transitions. [2022-07-19 15:49:58,571 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3376 transitions. Word has length 69 [2022-07-19 15:49:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:49:58,572 INFO L495 AbstractCegarLoop]: Abstraction has 2417 states and 3376 transitions. [2022-07-19 15:49:58,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 15:49:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3376 transitions. [2022-07-19 15:49:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 15:49:58,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:49:58,573 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:49:58,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 15:49:58,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:58,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:49:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:49:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 2 times [2022-07-19 15:49:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:49:58,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925118143] [2022-07-19 15:49:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:49:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:49:58,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:49:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704194393] [2022-07-19 15:49:58,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:49:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:49:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:49:58,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:49:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 15:49:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:49:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:49:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-19 15:49:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:49:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 15:49:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:50:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 15:50:00,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:50:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925118143] [2022-07-19 15:50:00,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:50:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704194393] [2022-07-19 15:50:00,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704194393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:50:00,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:50:00,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-07-19 15:50:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970763870] [2022-07-19 15:50:00,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:50:00,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:50:00,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:50:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:50:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:50:00,139 INFO L87 Difference]: Start difference. First operand 2417 states and 3376 transitions. Second operand has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-19 15:50:05,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:07,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:09,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:12,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:14,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:16,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:18,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:50:21,483 INFO L93 Difference]: Finished difference Result 3015 states and 4155 transitions. [2022-07-19 15:50:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 15:50:21,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 71 [2022-07-19 15:50:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:50:21,494 INFO L225 Difference]: With dead ends: 3015 [2022-07-19 15:50:21,495 INFO L226 Difference]: Without dead ends: 3013 [2022-07-19 15:50:21,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 15:50:21,497 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 197 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 210 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:50:21,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 694 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1101 Invalid, 4 Unknown, 0 Unchecked, 20.2s Time] [2022-07-19 15:50:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2022-07-19 15:50:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2909. [2022-07-19 15:50:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2124 states have (on average 1.3074387947269304) internal successors, (2777), 2161 states have internal predecessors, (2777), 627 states have call successors, (627), 157 states have call predecessors, (627), 157 states have return successors, (620), 590 states have call predecessors, (620), 620 states have call successors, (620) [2022-07-19 15:50:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4024 transitions. [2022-07-19 15:50:22,029 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4024 transitions. Word has length 71 [2022-07-19 15:50:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:50:22,029 INFO L495 AbstractCegarLoop]: Abstraction has 2909 states and 4024 transitions. [2022-07-19 15:50:22,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-19 15:50:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4024 transitions. [2022-07-19 15:50:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 15:50:22,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:50:22,036 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:50:22,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 15:50:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-19 15:50:22,249 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:50:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:50:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2022-07-19 15:50:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:50:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728400648] [2022-07-19 15:50:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:50:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:50:22,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:50:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734559596] [2022-07-19 15:50:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:50:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:50:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:50:22,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:50:22,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 15:50:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:50:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 15:50:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:50:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-19 15:50:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:50:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:50:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728400648] [2022-07-19 15:50:23,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:50:23,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734559596] [2022-07-19 15:50:23,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734559596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:50:23,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:50:23,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-19 15:50:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709296506] [2022-07-19 15:50:23,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:50:23,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:50:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:50:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:50:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:50:23,138 INFO L87 Difference]: Start difference. First operand 2909 states and 4024 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-19 15:50:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:50:23,868 INFO L93 Difference]: Finished difference Result 3000 states and 4152 transitions. [2022-07-19 15:50:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:50:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 85 [2022-07-19 15:50:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:50:23,878 INFO L225 Difference]: With dead ends: 3000 [2022-07-19 15:50:23,878 INFO L226 Difference]: Without dead ends: 2998 [2022-07-19 15:50:23,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:50:23,880 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:50:23,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 295 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:50:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2022-07-19 15:50:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2989. [2022-07-19 15:50:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2168 states have (on average 1.305350553505535) internal successors, (2830), 2206 states have internal predecessors, (2830), 655 states have call successors, (655), 165 states have call predecessors, (655), 165 states have return successors, (648), 617 states have call predecessors, (648), 648 states have call successors, (648) [2022-07-19 15:50:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4133 transitions. [2022-07-19 15:50:24,335 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4133 transitions. Word has length 85 [2022-07-19 15:50:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:50:24,336 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4133 transitions. [2022-07-19 15:50:24,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-19 15:50:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4133 transitions. [2022-07-19 15:50:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-19 15:50:24,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:50:24,338 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 15:50:24,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 15:50:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 15:50:24,538 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:50:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:50:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2022-07-19 15:50:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:50:24,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511776159] [2022-07-19 15:50:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:50:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:50:24,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:50:24,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980782396] [2022-07-19 15:50:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:50:24,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:50:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:50:24,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:50:24,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 15:50:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:50:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 15:50:24,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:50:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 39 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 15:50:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:50:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 15:50:30,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:50:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511776159] [2022-07-19 15:50:30,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:50:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980782396] [2022-07-19 15:50:30,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980782396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:50:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:50:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-07-19 15:50:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172470859] [2022-07-19 15:50:30,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:50:30,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 15:50:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:50:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 15:50:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:50:30,712 INFO L87 Difference]: Start difference. First operand 2989 states and 4133 transitions. Second operand has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-19 15:50:39,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:45,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:50:56,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:04,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:08,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:18,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:20,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:27,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:51:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:51:36,035 INFO L93 Difference]: Finished difference Result 3711 states and 5085 transitions. [2022-07-19 15:51:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 15:51:36,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 84 [2022-07-19 15:51:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:51:36,049 INFO L225 Difference]: With dead ends: 3711 [2022-07-19 15:51:36,049 INFO L226 Difference]: Without dead ends: 3674 [2022-07-19 15:51:36,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=1782, Invalid=9138, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 15:51:36,053 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 373 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 466 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:51:36,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1044 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2176 Invalid, 6 Unknown, 0 Unchecked, 31.1s Time] [2022-07-19 15:51:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-07-19 15:51:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3353. [2022-07-19 15:51:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 2421 states have (on average 1.3093762907889301) internal successors, (3170), 2464 states have internal predecessors, (3170), 747 states have call successors, (747), 184 states have call predecessors, (747), 184 states have return successors, (740), 704 states have call predecessors, (740), 740 states have call successors, (740) [2022-07-19 15:51:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4657 transitions. [2022-07-19 15:51:36,827 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4657 transitions. Word has length 84 [2022-07-19 15:51:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:51:36,827 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 4657 transitions. [2022-07-19 15:51:36,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-19 15:51:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4657 transitions. [2022-07-19 15:51:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 15:51:36,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:51:36,829 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:51:36,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 15:51:37,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:37,052 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:51:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:51:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash 403460013, now seen corresponding path program 3 times [2022-07-19 15:51:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:51:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612887933] [2022-07-19 15:51:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:51:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:51:37,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:51:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963312490] [2022-07-19 15:51:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:51:37,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:51:37,084 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:51:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 15:51:37,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:51:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:51:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-19 15:51:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:51:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 15:51:37,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:51:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 15:51:38,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:51:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612887933] [2022-07-19 15:51:38,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:51:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963312490] [2022-07-19 15:51:38,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963312490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:51:38,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:51:38,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2022-07-19 15:51:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595283869] [2022-07-19 15:51:38,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:51:38,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:51:38,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:51:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:51:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:51:38,728 INFO L87 Difference]: Start difference. First operand 3353 states and 4657 transitions. Second operand has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 15:51:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:51:51,495 INFO L93 Difference]: Finished difference Result 3499 states and 4843 transitions. [2022-07-19 15:51:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:51:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 93 [2022-07-19 15:51:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:51:51,511 INFO L225 Difference]: With dead ends: 3499 [2022-07-19 15:51:51,511 INFO L226 Difference]: Without dead ends: 3483 [2022-07-19 15:51:51,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 15:51:51,513 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 148 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:51:51,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 594 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-07-19 15:51:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2022-07-19 15:51:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3269. [2022-07-19 15:51:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3269 states, 2343 states have (on average 1.3077251387110542) internal successors, (3064), 2379 states have internal predecessors, (3064), 741 states have call successors, (741), 185 states have call predecessors, (741), 184 states have return successors, (740), 704 states have call predecessors, (740), 740 states have call successors, (740) [2022-07-19 15:51:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 4545 transitions. [2022-07-19 15:51:52,232 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 4545 transitions. Word has length 93 [2022-07-19 15:51:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:51:52,232 INFO L495 AbstractCegarLoop]: Abstraction has 3269 states and 4545 transitions. [2022-07-19 15:51:52,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 15:51:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 4545 transitions. [2022-07-19 15:51:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 15:51:52,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:51:52,234 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:51:52,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 15:51:52,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:52,439 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:51:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:51:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2022-07-19 15:51:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:51:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291402977] [2022-07-19 15:51:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:51:52,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:51:52,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:51:52,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274366562] [2022-07-19 15:51:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:51:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:51:52,458 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:51:52,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 15:51:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:51:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:51:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:51:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 15:51:52,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:51:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 15:51:52,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:51:52,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291402977] [2022-07-19 15:51:52,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:51:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274366562] [2022-07-19 15:51:52,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274366562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:51:52,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:51:52,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-19 15:51:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779673171] [2022-07-19 15:51:52,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:51:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 15:51:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:51:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 15:51:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:51:52,840 INFO L87 Difference]: Start difference. First operand 3269 states and 4545 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:51:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:51:54,834 INFO L93 Difference]: Finished difference Result 7430 states and 10799 transitions. [2022-07-19 15:51:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 15:51:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2022-07-19 15:51:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:51:54,850 INFO L225 Difference]: With dead ends: 7430 [2022-07-19 15:51:54,850 INFO L226 Difference]: Without dead ends: 6227 [2022-07-19 15:51:54,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:51:54,854 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 539 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:51:54,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 704 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:51:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2022-07-19 15:51:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 5873. [2022-07-19 15:51:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 3990 states have (on average 1.2984962406015037) internal successors, (5181), 3997 states have internal predecessors, (5181), 1569 states have call successors, (1569), 314 states have call predecessors, (1569), 313 states have return successors, (1568), 1561 states have call predecessors, (1568), 1568 states have call successors, (1568) [2022-07-19 15:51:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 8318 transitions. [2022-07-19 15:51:56,273 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 8318 transitions. Word has length 94 [2022-07-19 15:51:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:51:56,273 INFO L495 AbstractCegarLoop]: Abstraction has 5873 states and 8318 transitions. [2022-07-19 15:51:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:51:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 8318 transitions. [2022-07-19 15:51:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 15:51:56,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:51:56,275 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:51:56,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 15:51:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 15:51:56,475 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:51:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:51:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2022-07-19 15:51:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:51:56,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462899920] [2022-07-19 15:51:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:51:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:51:56,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:51:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934837504] [2022-07-19 15:51:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:51:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:51:56,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:51:56,488 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:51:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 15:51:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:51:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:51:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:51:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:51:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-19 15:51:56,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:51:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-19 15:51:56,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:51:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462899920] [2022-07-19 15:51:56,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:51:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934837504] [2022-07-19 15:51:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934837504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:51:56,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:51:56,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-19 15:51:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520415103] [2022-07-19 15:51:56,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:51:56,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:51:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:51:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:51:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:51:56,706 INFO L87 Difference]: Start difference. First operand 5873 states and 8318 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 15:51:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:51:59,590 INFO L93 Difference]: Finished difference Result 9618 states and 14044 transitions. [2022-07-19 15:51:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 15:51:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-07-19 15:51:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:51:59,617 INFO L225 Difference]: With dead ends: 9618 [2022-07-19 15:51:59,618 INFO L226 Difference]: Without dead ends: 8975 [2022-07-19 15:51:59,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:51:59,623 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 206 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:51:59,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 520 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:51:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2022-07-19 15:52:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 5933. [2022-07-19 15:52:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5933 states, 4050 states have (on average 1.3024691358024691) internal successors, (5275), 4059 states have internal predecessors, (5275), 1569 states have call successors, (1569), 314 states have call predecessors, (1569), 313 states have return successors, (1568), 1559 states have call predecessors, (1568), 1568 states have call successors, (1568) [2022-07-19 15:52:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5933 states to 5933 states and 8412 transitions. [2022-07-19 15:52:01,381 INFO L78 Accepts]: Start accepts. Automaton has 5933 states and 8412 transitions. Word has length 95 [2022-07-19 15:52:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:52:01,381 INFO L495 AbstractCegarLoop]: Abstraction has 5933 states and 8412 transitions. [2022-07-19 15:52:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 15:52:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5933 states and 8412 transitions. [2022-07-19 15:52:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 15:52:01,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:52:01,384 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:52:01,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 15:52:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 15:52:01,606 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:52:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:52:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2022-07-19 15:52:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:52:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509436109] [2022-07-19 15:52:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:52:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:52:01,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:52:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862689921] [2022-07-19 15:52:01,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:52:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:52:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:52:01,622 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:52:01,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 15:52:01,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:52:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:52:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-19 15:52:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:52:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 73 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-19 15:52:02,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:52:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 73 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-19 15:52:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:52:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509436109] [2022-07-19 15:52:04,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:52:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862689921] [2022-07-19 15:52:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862689921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:52:04,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:52:04,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-07-19 15:52:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007940859] [2022-07-19 15:52:04,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:52:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 15:52:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:52:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 15:52:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:52:04,487 INFO L87 Difference]: Start difference. First operand 5933 states and 8412 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-19 15:52:16,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:52:21,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:52:30,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:52:37,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:52:43,980 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 127 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:52:51,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:00,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:10,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:10,184 INFO L93 Difference]: Finished difference Result 7227 states and 10310 transitions. [2022-07-19 15:53:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 15:53:10,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 104 [2022-07-19 15:53:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:10,204 INFO L225 Difference]: With dead ends: 7227 [2022-07-19 15:53:10,204 INFO L226 Difference]: Without dead ends: 7221 [2022-07-19 15:53:10,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=1012, Invalid=4389, Unknown=1, NotChecked=0, Total=5402 [2022-07-19 15:53:10,208 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 339 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 583 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:10,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 876 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 2009 Invalid, 2 Unknown, 0 Unchecked, 33.9s Time] [2022-07-19 15:53:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2022-07-19 15:53:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 6355. [2022-07-19 15:53:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 4346 states have (on average 1.3039576622181317) internal successors, (5667), 4355 states have internal predecessors, (5667), 1673 states have call successors, (1673), 336 states have call predecessors, (1673), 335 states have return successors, (1672), 1663 states have call predecessors, (1672), 1672 states have call successors, (1672) [2022-07-19 15:53:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 9012 transitions. [2022-07-19 15:53:12,024 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 9012 transitions. Word has length 104 [2022-07-19 15:53:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:12,024 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 9012 transitions. [2022-07-19 15:53:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-19 15:53:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 9012 transitions. [2022-07-19 15:53:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 15:53:12,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:12,027 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:12,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:12,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 15:53:12,250 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:12,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241099, now seen corresponding path program 1 times [2022-07-19 15:53:12,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:12,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811451634] [2022-07-19 15:53:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:12,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614638306] [2022-07-19 15:53:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:12,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:12,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 15:53:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 15:53:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 15:53:12,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 15:53:12,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811451634] [2022-07-19 15:53:12,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614638306] [2022-07-19 15:53:12,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614638306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:12,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:12,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-19 15:53:12,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260889872] [2022-07-19 15:53:12,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:12,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 15:53:12,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 15:53:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:53:12,735 INFO L87 Difference]: Start difference. First operand 6355 states and 9012 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:53:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:15,243 INFO L93 Difference]: Finished difference Result 10736 states and 15467 transitions. [2022-07-19 15:53:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 15:53:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2022-07-19 15:53:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:15,261 INFO L225 Difference]: With dead ends: 10736 [2022-07-19 15:53:15,261 INFO L226 Difference]: Without dead ends: 6890 [2022-07-19 15:53:15,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 15:53:15,270 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 737 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:15,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 608 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:53:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6890 states. [2022-07-19 15:53:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6890 to 6709. [2022-07-19 15:53:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 4407 states have (on average 1.2300884955752212) internal successors, (5421), 4411 states have internal predecessors, (5421), 1923 states have call successors, (1923), 379 states have call predecessors, (1923), 378 states have return successors, (1922), 1918 states have call predecessors, (1922), 1922 states have call successors, (1922) [2022-07-19 15:53:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 9266 transitions. [2022-07-19 15:53:17,249 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 9266 transitions. Word has length 106 [2022-07-19 15:53:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:17,249 INFO L495 AbstractCegarLoop]: Abstraction has 6709 states and 9266 transitions. [2022-07-19 15:53:17,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 15:53:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 9266 transitions. [2022-07-19 15:53:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-19 15:53:17,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:17,254 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:17,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 15:53:17,468 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1649322963, now seen corresponding path program 2 times [2022-07-19 15:53:17,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:17,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140893541] [2022-07-19 15:53:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:17,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:17,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120665846] [2022-07-19 15:53:17,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:53:17,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:17,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:17,480 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:17,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 15:53:17,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:53:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 15:53:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 15:53:17,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-19 15:53:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140893541] [2022-07-19 15:53:18,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120665846] [2022-07-19 15:53:18,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120665846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:18,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2022-07-19 15:53:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436322008] [2022-07-19 15:53:18,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:18,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 15:53:18,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 15:53:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:53:18,126 INFO L87 Difference]: Start difference. First operand 6709 states and 9266 transitions. Second operand has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-19 15:53:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:22,733 INFO L93 Difference]: Finished difference Result 13073 states and 18867 transitions. [2022-07-19 15:53:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 15:53:22,734 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 128 [2022-07-19 15:53:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:22,762 INFO L225 Difference]: With dead ends: 13073 [2022-07-19 15:53:22,762 INFO L226 Difference]: Without dead ends: 13068 [2022-07-19 15:53:22,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 15:53:22,767 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1157 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:22,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 971 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:53:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2022-07-19 15:53:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 12508. [2022-07-19 15:53:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12508 states, 8450 states have (on average 1.2985798816568048) internal successors, (10973), 8531 states have internal predecessors, (10973), 3491 states have call successors, (3491), 567 states have call predecessors, (3491), 566 states have return successors, (3490), 3409 states have call predecessors, (3490), 3490 states have call successors, (3490) [2022-07-19 15:53:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12508 states to 12508 states and 17954 transitions. [2022-07-19 15:53:26,471 INFO L78 Accepts]: Start accepts. Automaton has 12508 states and 17954 transitions. Word has length 128 [2022-07-19 15:53:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:26,471 INFO L495 AbstractCegarLoop]: Abstraction has 12508 states and 17954 transitions. [2022-07-19 15:53:26,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-19 15:53:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12508 states and 17954 transitions. [2022-07-19 15:53:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 15:53:26,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:26,476 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:26,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:26,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 15:53:26,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash 524158234, now seen corresponding path program 3 times [2022-07-19 15:53:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699195358] [2022-07-19 15:53:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:26,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:26,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402513590] [2022-07-19 15:53:26,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:53:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:26,703 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:26,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 15:53:26,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 15:53:26,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:53:26,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-19 15:53:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 116 proven. 64 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-07-19 15:53:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-19 15:53:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699195358] [2022-07-19 15:53:55,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:55,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402513590] [2022-07-19 15:53:55,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402513590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:55,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:55,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-07-19 15:53:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248399271] [2022-07-19 15:53:55,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:55,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 15:53:55,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 15:53:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=889, Unknown=2, NotChecked=0, Total=1056 [2022-07-19 15:53:55,026 INFO L87 Difference]: Start difference. First operand 12508 states and 17954 transitions. Second operand has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 11 states have call predecessors, (28), 10 states have call successors, (28)