./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:38:52,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:38:52,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:38:52,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:38:52,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:38:52,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:38:52,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:38:52,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:38:52,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:38:52,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:38:52,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:38:52,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:38:52,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:38:52,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:38:52,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:38:52,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:38:52,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:38:52,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:38:52,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:38:52,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:38:52,721 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:38:52,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:38:52,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:38:52,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:38:52,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:38:52,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:38:52,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:38:52,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:38:52,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:38:52,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:38:52,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:38:52,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:38:52,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:38:52,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:38:52,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:38:52,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:38:52,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:38:52,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:38:52,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:38:52,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:38:52,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:38:52,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:38:52,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:38:52,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:38:52,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:38:52,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:38:52,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:38:52,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:38:52,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:38:52,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:38:52,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:38:52,769 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:38:52,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:38:52,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:38:52,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:38:52,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:38:52,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:38:52,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:38:52,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:38:52,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:38:52,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:38:52,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:38:52,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:38:52,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:38:52,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:38:52,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:38:52,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2022-07-12 04:38:52,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:38:53,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:38:53,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:38:53,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:38:53,012 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:38:53,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-07-12 04:38:53,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8ddc2e6f/d8d82cfd61e5424fa7ad73ff0d41071a/FLAG25e25ca72 [2022-07-12 04:38:53,430 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:38:53,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-07-12 04:38:53,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8ddc2e6f/d8d82cfd61e5424fa7ad73ff0d41071a/FLAG25e25ca72 [2022-07-12 04:38:53,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8ddc2e6f/d8d82cfd61e5424fa7ad73ff0d41071a [2022-07-12 04:38:53,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:38:53,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:38:53,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:38:53,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:38:53,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:38:53,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689e0ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53, skipping insertion in model container [2022-07-12 04:38:53,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:38:53,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:38:53,613 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-07-12 04:38:53,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:38:53,640 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:38:53,651 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-07-12 04:38:53,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:38:53,671 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:38:53,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53 WrapperNode [2022-07-12 04:38:53,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:38:53,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:38:53,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:38:53,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:38:53,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,710 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-07-12 04:38:53,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:38:53,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:38:53,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:38:53,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:38:53,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:38:53,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:38:53,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:38:53,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:38:53,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (1/1) ... [2022-07-12 04:38:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:38:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:53,779 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) [2022-07-12 04:38:53,794 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 [2022-07-12 04:38:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:38:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:38:53,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:38:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:38:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:38:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:38:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:38:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:38:53,859 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:38:53,860 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:38:54,050 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:38:54,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:38:54,056 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 04:38:54,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:38:54 BoogieIcfgContainer [2022-07-12 04:38:54,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:38:54,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:38:54,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:38:54,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:38:54,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:38:53" (1/3) ... [2022-07-12 04:38:54,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4435da31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:38:54, skipping insertion in model container [2022-07-12 04:38:54,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:38:53" (2/3) ... [2022-07-12 04:38:54,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4435da31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:38:54, skipping insertion in model container [2022-07-12 04:38:54,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:38:54" (3/3) ... [2022-07-12 04:38:54,085 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2022-07-12 04:38:54,101 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:38:54,101 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:38:54,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:38:54,159 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@4ff37fa2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55f0b8d7 [2022-07-12 04:38:54,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:38:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 04:38:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 04:38:54,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:54,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:54,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-07-12 04:38:54,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679617856] [2022-07-12 04:38:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:38:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 04:38:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 04:38:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:38:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:38:54,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679617856] [2022-07-12 04:38:54,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679617856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:38:54,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:38:54,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:38:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166378395] [2022-07-12 04:38:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:54,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:38:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:38:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:38:54,400 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:38:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:54,415 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-07-12 04:38:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:38:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-12 04:38:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:54,422 INFO L225 Difference]: With dead ends: 65 [2022-07-12 04:38:54,422 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 04:38:54,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:38:54,427 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 [2022-07-12 04:38:54,427 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] [2022-07-12 04:38:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 04:38:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-12 04:38:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:38:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-07-12 04:38:54,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-07-12 04:38:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-07-12 04:38:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:38:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-07-12 04:38:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:38:54,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:54,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:38:54,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-07-12 04:38:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940620843] [2022-07-12 04:38:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:54,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:54,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551004768] [2022-07-12 04:38:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:54,474 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) [2022-07-12 04:38:54,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:38:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 04:38:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:38:54,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:38:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:54,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940620843] [2022-07-12 04:38:54,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:54,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551004768] [2022-07-12 04:38:54,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551004768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:38:54,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:38:54,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:38:54,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465515388] [2022-07-12 04:38:54,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:54,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:38:54,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:38:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:38:54,608 INFO L87 Difference]: Start difference. First operand 30 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:54,622 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-07-12 04:38:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:38:54,623 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-12 04:38:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:54,624 INFO L225 Difference]: With dead ends: 40 [2022-07-12 04:38:54,624 INFO L226 Difference]: Without dead ends: 32 [2022-07-12 04:38:54,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:38:54,625 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:54,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:38:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-12 04:38:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-12 04:38:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:38:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-12 04:38:54,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-07-12 04:38:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:54,634 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-12 04:38:54,634 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-12 04:38:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:38:54,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:54,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:54,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:54,852 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 [2022-07-12 04:38:54,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-07-12 04:38:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:54,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36844001] [2022-07-12 04:38:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:54,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571547710] [2022-07-12 04:38:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:54,882 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) [2022-07-12 04:38:54,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:38:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:38:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:38:54,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:38:55,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36844001] [2022-07-12 04:38:55,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571547710] [2022-07-12 04:38:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571547710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:38:55,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:38:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-12 04:38:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389076791] [2022-07-12 04:38:55,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:55,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:38:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:38:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:38:55,075 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:38:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:55,178 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-07-12 04:38:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:38:55,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-12 04:38:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:55,180 INFO L225 Difference]: With dead ends: 49 [2022-07-12 04:38:55,180 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 04:38:55,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:38:55,183 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:55,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:38:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 04:38:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-12 04:38:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:38:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-12 04:38:55,209 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-07-12 04:38:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:55,210 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-12 04:38:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:38:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-12 04:38:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:38:55,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:55,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:55,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:55,430 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 [2022-07-12 04:38:55,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-07-12 04:38:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:55,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278525110] [2022-07-12 04:38:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:55,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:55,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126967649] [2022-07-12 04:38:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:55,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:55,456 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) [2022-07-12 04:38:55,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:38:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:38:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:38:55,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:38:55,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278525110] [2022-07-12 04:38:55,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126967649] [2022-07-12 04:38:55,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126967649] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:38:55,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:38:55,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-12 04:38:55,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783067874] [2022-07-12 04:38:55,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:38:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:55,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:38:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:38:55,667 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:55,719 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-12 04:38:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:38:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-12 04:38:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:55,720 INFO L225 Difference]: With dead ends: 39 [2022-07-12 04:38:55,720 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 04:38:55,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:38:55,721 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:55,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:38:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 04:38:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-12 04:38:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:38:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-12 04:38:55,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-07-12 04:38:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:55,727 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-12 04:38:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-12 04:38:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:38:55,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:55,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:55,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:55,950 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 [2022-07-12 04:38:55,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-07-12 04:38:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320130950] [2022-07-12 04:38:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:55,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860528122] [2022-07-12 04:38:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:55,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:55,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:55,961 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) [2022-07-12 04:38:55,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:38:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:38:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:38:56,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:38:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320130950] [2022-07-12 04:38:56,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860528122] [2022-07-12 04:38:56,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860528122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:38:56,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:38:56,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:38:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79854242] [2022-07-12 04:38:56,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:56,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:38:56,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:38:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:38:56,033 INFO L87 Difference]: Start difference. First operand 37 states and 47 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:56,055 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-07-12 04:38:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:38:56,055 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-12 04:38:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:56,056 INFO L225 Difference]: With dead ends: 62 [2022-07-12 04:38:56,056 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 04:38:56,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:38:56,057 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:56,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:38:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 04:38:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-12 04:38:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:38:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-12 04:38:56,062 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-07-12 04:38:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:56,062 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-12 04:38:56,063 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:38:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-12 04:38:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:38:56,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:56,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:56,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:56,277 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 [2022-07-12 04:38:56,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-07-12 04:38:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776683629] [2022-07-12 04:38:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:56,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:56,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:56,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015671600] [2022-07-12 04:38:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:56,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:56,289 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) [2022-07-12 04:38:56,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:38:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:38:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:38:56,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:38:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776683629] [2022-07-12 04:38:56,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015671600] [2022-07-12 04:38:56,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015671600] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:38:56,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:38:56,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-12 04:38:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048614573] [2022-07-12 04:38:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:56,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:38:56,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:38:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:38:56,589 INFO L87 Difference]: Start difference. First operand 39 states and 49 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, (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) [2022-07-12 04:38:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:56,637 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-07-12 04:38:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:38:56,638 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, (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 37 [2022-07-12 04:38:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:56,639 INFO L225 Difference]: With dead ends: 53 [2022-07-12 04:38:56,639 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 04:38:56,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:38:56,640 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:56,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:38:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 04:38:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-12 04:38:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 04:38:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-12 04:38:56,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-07-12 04:38:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:56,646 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-12 04:38:56,647 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, (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) [2022-07-12 04:38:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-12 04:38:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:38:56,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:56,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:56,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:56,867 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 [2022-07-12 04:38:56,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:56,868 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-07-12 04:38:56,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:56,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868780542] [2022-07-12 04:38:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:56,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:56,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857792417] [2022-07-12 04:38:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:56,877 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) [2022-07-12 04:38:56,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:38:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:38:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:38:57,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 04:38:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868780542] [2022-07-12 04:38:57,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857792417] [2022-07-12 04:38:57,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857792417] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:38:57,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:38:57,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-12 04:38:57,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833957922] [2022-07-12 04:38:57,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:38:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:38:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:38:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:38:57,112 INFO L87 Difference]: Start difference. First operand 50 states and 65 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, (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) [2022-07-12 04:38:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:57,152 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-12 04:38:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:38:57,153 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, (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 42 [2022-07-12 04:38:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:57,154 INFO L225 Difference]: With dead ends: 57 [2022-07-12 04:38:57,154 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 04:38:57,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:38:57,154 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 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 [2022-07-12 04:38:57,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:38:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 04:38:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-12 04:38:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 04:38:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-12 04:38:57,160 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-07-12 04:38:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:57,161 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-12 04:38:57,161 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, (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) [2022-07-12 04:38:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-12 04:38:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 04:38:57,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:57,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:57,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 04:38:57,379 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 [2022-07-12 04:38:57,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-07-12 04:38:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:57,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57808934] [2022-07-12 04:38:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:57,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:57,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732984325] [2022-07-12 04:38:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:57,401 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) [2022-07-12 04:38:57,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:38:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:38:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:38:57,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57808934] [2022-07-12 04:38:57,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732984325] [2022-07-12 04:38:57,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732984325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:38:57,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:38:57,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-12 04:38:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440349338] [2022-07-12 04:38:57,709 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:57,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:38:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:38:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:38:57,710 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:38:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:57,811 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-07-12 04:38:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:38:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-07-12 04:38:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:57,812 INFO L225 Difference]: With dead ends: 61 [2022-07-12 04:38:57,812 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 04:38:57,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:38:57,813 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:57,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 136 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:38:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 04:38:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-07-12 04:38:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 04:38:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-12 04:38:57,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-07-12 04:38:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:57,819 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-12 04:38:57,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:38:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-12 04:38:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 04:38:57,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:57,820 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:57,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:58,036 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 [2022-07-12 04:38:58,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-07-12 04:38:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:58,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681503068] [2022-07-12 04:38:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:58,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982024158] [2022-07-12 04:38:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:58,060 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) [2022-07-12 04:38:58,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:38:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:58,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:38:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:38:58,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:38:58,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:58,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681503068] [2022-07-12 04:38:58,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:58,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982024158] [2022-07-12 04:38:58,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982024158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:38:58,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:38:58,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-12 04:38:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544412442] [2022-07-12 04:38:58,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:58,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:38:58,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:38:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:38:58,221 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:38:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:58,357 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-07-12 04:38:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:38:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-12 04:38:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:58,359 INFO L225 Difference]: With dead ends: 211 [2022-07-12 04:38:58,360 INFO L226 Difference]: Without dead ends: 203 [2022-07-12 04:38:58,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:38:58,360 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:58,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:38:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-12 04:38:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-07-12 04:38:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-12 04:38:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-07-12 04:38:58,376 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-07-12 04:38:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:58,376 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-07-12 04:38:58,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:38:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-07-12 04:38:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 04:38:58,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:58,377 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-07-12 04:38:58,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:58,594 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 [2022-07-12 04:38:58,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-07-12 04:38:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:58,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859525479] [2022-07-12 04:38:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:58,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223916392] [2022-07-12 04:38:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:58,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:58,624 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) [2022-07-12 04:38:58,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:38:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:38:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 04:38:58,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 04:38:58,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859525479] [2022-07-12 04:38:58,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223916392] [2022-07-12 04:38:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223916392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:38:58,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:38:58,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 04:38:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615031548] [2022-07-12 04:38:58,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:38:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:38:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:38:58,764 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 04:38:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:58,925 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-07-12 04:38:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:38:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-07-12 04:38:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:58,927 INFO L225 Difference]: With dead ends: 279 [2022-07-12 04:38:58,927 INFO L226 Difference]: Without dead ends: 259 [2022-07-12 04:38:58,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:38:58,928 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:58,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 334 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:38:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-12 04:38:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-07-12 04:38:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 04:38:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-07-12 04:38:58,945 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-07-12 04:38:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:58,945 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-07-12 04:38:58,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 04:38:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-07-12 04:38:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:38:58,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:58,946 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-07-12 04:38:58,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:59,162 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 [2022-07-12 04:38:59,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-07-12 04:38:59,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:59,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198528658] [2022-07-12 04:38:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:59,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:59,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:59,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844493057] [2022-07-12 04:38:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:59,188 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) [2022-07-12 04:38:59,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:38:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:59,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:38:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:38:59,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:38:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198528658] [2022-07-12 04:38:59,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844493057] [2022-07-12 04:38:59,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844493057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:38:59,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:38:59,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-12 04:38:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791522033] [2022-07-12 04:38:59,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:38:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:38:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:38:59,336 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:38:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:38:59,457 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-07-12 04:38:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:38:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-07-12 04:38:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:38:59,459 INFO L225 Difference]: With dead ends: 344 [2022-07-12 04:38:59,459 INFO L226 Difference]: Without dead ends: 248 [2022-07-12 04:38:59,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:38:59,460 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:38:59,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 188 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:38:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-12 04:38:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-07-12 04:38:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-12 04:38:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-07-12 04:38:59,475 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-07-12 04:38:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:38:59,475 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-07-12 04:38:59,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:38:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-07-12 04:38:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 04:38:59,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:38:59,476 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:38:59,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:38:59,692 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 [2022-07-12 04:38:59,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:38:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:38:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-07-12 04:38:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:38:59,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710571925] [2022-07-12 04:38:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:59,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:38:59,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:38:59,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362939224] [2022-07-12 04:38:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:38:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:38:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:38:59,701 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) [2022-07-12 04:38:59,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:38:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:38:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:38:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:38:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 04:38:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:38:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 04:38:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:38:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710571925] [2022-07-12 04:38:59,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:38:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362939224] [2022-07-12 04:38:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362939224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:38:59,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:38:59,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-12 04:38:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049597356] [2022-07-12 04:38:59,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:38:59,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:38:59,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:38:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:38:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:38:59,947 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-12 04:39:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:00,233 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-07-12 04:39:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:39:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-07-12 04:39:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:00,236 INFO L225 Difference]: With dead ends: 330 [2022-07-12 04:39:00,236 INFO L226 Difference]: Without dead ends: 324 [2022-07-12 04:39:00,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:39:00,237 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 286 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:39:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-12 04:39:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-07-12 04:39:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-07-12 04:39:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-07-12 04:39:00,268 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-07-12 04:39:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:00,268 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-07-12 04:39:00,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-12 04:39:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-07-12 04:39:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 04:39:00,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:00,269 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:00,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:00,486 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 [2022-07-12 04:39:00,487 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-07-12 04:39:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604873012] [2022-07-12 04:39:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:00,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:00,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:00,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770107349] [2022-07-12 04:39:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:39:00,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:00,496 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) [2022-07-12 04:39:00,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:39:00,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:39:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:39:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:39:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-12 04:39:00,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604873012] [2022-07-12 04:39:01,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770107349] [2022-07-12 04:39:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770107349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:39:01,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:39:01,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-12 04:39:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784951524] [2022-07-12 04:39:01,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:39:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:39:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:39:01,208 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 04:39:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:01,582 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-07-12 04:39:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:39:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-07-12 04:39:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:01,590 INFO L225 Difference]: With dead ends: 315 [2022-07-12 04:39:01,590 INFO L226 Difference]: Without dead ends: 313 [2022-07-12 04:39:01,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:39:01,591 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:01,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 245 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:39:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-12 04:39:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-07-12 04:39:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-07-12 04:39:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-07-12 04:39:01,647 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-07-12 04:39:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:01,647 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-07-12 04:39:01,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 04:39:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-07-12 04:39:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 04:39:01,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:01,653 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-07-12 04:39:01,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:01,868 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 [2022-07-12 04:39:01,868 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-07-12 04:39:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451779972] [2022-07-12 04:39:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:01,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:01,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423987782] [2022-07-12 04:39:01,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:39:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:01,882 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) [2022-07-12 04:39:01,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:39:01,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:39:01,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:39:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:39:01,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-12 04:39:02,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 04:39:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451779972] [2022-07-12 04:39:03,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423987782] [2022-07-12 04:39:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423987782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:03,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-07-12 04:39:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915322388] [2022-07-12 04:39:03,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:03,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 04:39:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 04:39:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:39:03,457 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-12 04:39:15,345 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 [] [2022-07-12 04:39:23,377 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 [] [2022-07-12 04:39:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:25,212 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-07-12 04:39:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:39:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-07-12 04:39:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:25,215 INFO L225 Difference]: With dead ends: 427 [2022-07-12 04:39:25,215 INFO L226 Difference]: Without dead ends: 423 [2022-07-12 04:39:25,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=289, Invalid=970, Unknown=1, NotChecked=0, Total=1260 [2022-07-12 04:39:25,216 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:25,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 256 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 732 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2022-07-12 04:39:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-12 04:39:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 388. [2022-07-12 04:39:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 254 states have (on average 1.2283464566929134) internal successors, (312), 264 states have internal predecessors, (312), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-12 04:39:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 510 transitions. [2022-07-12 04:39:25,265 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 510 transitions. Word has length 74 [2022-07-12 04:39:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:25,265 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 510 transitions. [2022-07-12 04:39:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-12 04:39:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 510 transitions. [2022-07-12 04:39:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 04:39:25,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:25,266 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1] [2022-07-12 04:39:25,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 04:39:25,482 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 [2022-07-12 04:39:25,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-07-12 04:39:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:25,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569468073] [2022-07-12 04:39:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:25,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:25,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:25,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461605016] [2022-07-12 04:39:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:25,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:25,494 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) [2022-07-12 04:39:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:39:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:39:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 04:39:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:39:25,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:39:26,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569468073] [2022-07-12 04:39:26,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461605016] [2022-07-12 04:39:26,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461605016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:26,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:26,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-12 04:39:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494956737] [2022-07-12 04:39:26,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:26,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:39:26,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:39:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:39:26,300 INFO L87 Difference]: Start difference. First operand 388 states and 510 transitions. Second operand has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 04:39:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:29,556 INFO L93 Difference]: Finished difference Result 450 states and 597 transitions. [2022-07-12 04:39:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 04:39:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 80 [2022-07-12 04:39:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:29,562 INFO L225 Difference]: With dead ends: 450 [2022-07-12 04:39:29,562 INFO L226 Difference]: Without dead ends: 439 [2022-07-12 04:39:29,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 04:39:29,563 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:29,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 388 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 04:39:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-12 04:39:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 429. [2022-07-12 04:39:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 292 states have internal predecessors, (349), 111 states have call successors, (111), 33 states have call predecessors, (111), 33 states have return successors, (109), 103 states have call predecessors, (109), 109 states have call successors, (109) [2022-07-12 04:39:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 569 transitions. [2022-07-12 04:39:29,615 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 569 transitions. Word has length 80 [2022-07-12 04:39:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:29,615 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 569 transitions. [2022-07-12 04:39:29,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 04:39:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 569 transitions. [2022-07-12 04:39:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 04:39:29,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:29,617 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:29,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:29,833 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 [2022-07-12 04:39:29,833 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-07-12 04:39:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261148803] [2022-07-12 04:39:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:29,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:29,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313042449] [2022-07-12 04:39:29,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:39:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:29,848 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) [2022-07-12 04:39:29,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:39:29,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:39:29,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:39:29,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:39:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-12 04:39:29,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:39:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261148803] [2022-07-12 04:39:29,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313042449] [2022-07-12 04:39:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313042449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:39:29,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:39:29,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:39:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523193803] [2022-07-12 04:39:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:39:29,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:39:29,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:39:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:39:29,920 INFO L87 Difference]: Start difference. First operand 429 states and 569 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-12 04:39:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:30,047 INFO L93 Difference]: Finished difference Result 656 states and 926 transitions. [2022-07-12 04:39:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:39:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-07-12 04:39:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:30,049 INFO L225 Difference]: With dead ends: 656 [2022-07-12 04:39:30,049 INFO L226 Difference]: Without dead ends: 491 [2022-07-12 04:39:30,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:39:30,050 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 163 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:39:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-12 04:39:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 456. [2022-07-12 04:39:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.2425249169435215) internal successors, (374), 309 states have internal predecessors, (374), 121 states have call successors, (121), 33 states have call predecessors, (121), 33 states have return successors, (119), 113 states have call predecessors, (119), 119 states have call successors, (119) [2022-07-12 04:39:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2022-07-12 04:39:30,121 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 96 [2022-07-12 04:39:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:30,122 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2022-07-12 04:39:30,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-12 04:39:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2022-07-12 04:39:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 04:39:30,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:30,123 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:30,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:30,339 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 [2022-07-12 04:39:30,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-07-12 04:39:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722743714] [2022-07-12 04:39:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:30,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:30,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125531331] [2022-07-12 04:39:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:30,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:30,350 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) [2022-07-12 04:39:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:39:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:39:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:39:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-12 04:39:30,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-12 04:39:30,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:30,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722743714] [2022-07-12 04:39:30,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:30,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125531331] [2022-07-12 04:39:30,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125531331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:30,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:30,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-12 04:39:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712671292] [2022-07-12 04:39:30,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:39:30,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:39:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:39:30,701 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-12 04:39:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:31,277 INFO L93 Difference]: Finished difference Result 1502 states and 2076 transitions. [2022-07-12 04:39:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:39:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-07-12 04:39:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:31,283 INFO L225 Difference]: With dead ends: 1502 [2022-07-12 04:39:31,283 INFO L226 Difference]: Without dead ends: 1289 [2022-07-12 04:39:31,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:39:31,284 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 266 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:31,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 469 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:39:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-12 04:39:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1265. [2022-07-12 04:39:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 799 states have (on average 1.1952440550688361) internal successors, (955), 820 states have internal predecessors, (955), 360 states have call successors, (360), 105 states have call predecessors, (360), 105 states have return successors, (351), 339 states have call predecessors, (351), 351 states have call successors, (351) [2022-07-12 04:39:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1666 transitions. [2022-07-12 04:39:31,495 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1666 transitions. Word has length 112 [2022-07-12 04:39:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:31,495 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1666 transitions. [2022-07-12 04:39:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-12 04:39:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1666 transitions. [2022-07-12 04:39:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 04:39:31,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:31,497 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:31,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:31,715 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 [2022-07-12 04:39:31,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2022-07-12 04:39:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259800926] [2022-07-12 04:39:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:31,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:31,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293904084] [2022-07-12 04:39:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:31,739 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) [2022-07-12 04:39:31,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:39:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:39:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 04:39:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 99 proven. 88 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-12 04:39:32,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:44,471 WARN L233 SmtUtils]: Spent 11.73s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:39:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259800926] [2022-07-12 04:39:44,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293904084] [2022-07-12 04:39:44,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293904084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:39:44,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:39:44,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-12 04:39:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082545421] [2022-07-12 04:39:44,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:39:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:39:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:39:44,474 INFO L87 Difference]: Start difference. First operand 1265 states and 1666 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:39:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:45,366 INFO L93 Difference]: Finished difference Result 1358 states and 1786 transitions. [2022-07-12 04:39:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:39:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 115 [2022-07-12 04:39:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:45,372 INFO L225 Difference]: With dead ends: 1358 [2022-07-12 04:39:45,372 INFO L226 Difference]: Without dead ends: 1356 [2022-07-12 04:39:45,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:39:45,373 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:45,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 338 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:39:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-07-12 04:39:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1348. [2022-07-12 04:39:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 846 states have (on average 1.1926713947990544) internal successors, (1009), 867 states have internal predecessors, (1009), 388 states have call successors, (388), 113 states have call predecessors, (388), 113 states have return successors, (379), 367 states have call predecessors, (379), 379 states have call successors, (379) [2022-07-12 04:39:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1776 transitions. [2022-07-12 04:39:45,600 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1776 transitions. Word has length 115 [2022-07-12 04:39:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:45,600 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1776 transitions. [2022-07-12 04:39:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:39:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1776 transitions. [2022-07-12 04:39:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-12 04:39:45,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:45,602 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:45,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:45,820 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 [2022-07-12 04:39:45,820 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2022-07-12 04:39:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171097306] [2022-07-12 04:39:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:45,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:45,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:45,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753228421] [2022-07-12 04:39:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:39:45,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:45,837 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) [2022-07-12 04:39:45,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:39:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:39:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:39:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 04:39:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-07-12 04:39:46,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 134 proven. 23 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-12 04:39:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171097306] [2022-07-12 04:39:46,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753228421] [2022-07-12 04:39:46,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753228421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:46,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:46,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-07-12 04:39:46,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759185611] [2022-07-12 04:39:46,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:46,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 04:39:46,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 04:39:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:39:46,969 INFO L87 Difference]: Start difference. First operand 1348 states and 1776 transitions. Second operand has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-12 04:39:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:49,589 INFO L93 Difference]: Finished difference Result 1521 states and 1959 transitions. [2022-07-12 04:39:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:39:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) Word has length 119 [2022-07-12 04:39:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:49,595 INFO L225 Difference]: With dead ends: 1521 [2022-07-12 04:39:49,595 INFO L226 Difference]: Without dead ends: 1517 [2022-07-12 04:39:49,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:39:49,596 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 100 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:49,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 356 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 04:39:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-07-12 04:39:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1507. [2022-07-12 04:39:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 952 states have (on average 1.1775210084033614) internal successors, (1121), 972 states have internal predecessors, (1121), 413 states have call successors, (413), 142 states have call predecessors, (413), 141 states have return successors, (404), 392 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-12 04:39:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 1938 transitions. [2022-07-12 04:39:49,842 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 1938 transitions. Word has length 119 [2022-07-12 04:39:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:49,844 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 1938 transitions. [2022-07-12 04:39:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-12 04:39:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 1938 transitions. [2022-07-12 04:39:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 04:39:49,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:49,845 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:49,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:39:50,059 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 [2022-07-12 04:39:50,059 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-07-12 04:39:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132506203] [2022-07-12 04:39:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:50,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:50,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059670363] [2022-07-12 04:39:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:50,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:50,071 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) [2022-07-12 04:39:50,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:39:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:39:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:39:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 04:39:50,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-12 04:39:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132506203] [2022-07-12 04:39:50,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:50,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059670363] [2022-07-12 04:39:50,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059670363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:50,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:50,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-12 04:39:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727438963] [2022-07-12 04:39:50,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:39:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:39:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:39:50,398 INFO L87 Difference]: Start difference. First operand 1507 states and 1938 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-07-12 04:39:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:39:50,953 INFO L93 Difference]: Finished difference Result 1573 states and 2000 transitions. [2022-07-12 04:39:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:39:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2022-07-12 04:39:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:39:50,958 INFO L225 Difference]: With dead ends: 1573 [2022-07-12 04:39:50,958 INFO L226 Difference]: Without dead ends: 1533 [2022-07-12 04:39:50,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:39:50,959 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 223 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:39:50,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 360 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:39:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-07-12 04:39:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1519. [2022-07-12 04:39:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 964 states have (on average 1.1483402489626555) internal successors, (1107), 984 states have internal predecessors, (1107), 413 states have call successors, (413), 142 states have call predecessors, (413), 141 states have return successors, (404), 392 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-12 04:39:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1924 transitions. [2022-07-12 04:39:51,193 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1924 transitions. Word has length 129 [2022-07-12 04:39:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:39:51,193 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 1924 transitions. [2022-07-12 04:39:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-07-12 04:39:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1924 transitions. [2022-07-12 04:39:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 04:39:51,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:39:51,195 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:39:51,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 04:39:51,411 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 [2022-07-12 04:39:51,411 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:39:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:39:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-07-12 04:39:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:39:51,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742830400] [2022-07-12 04:39:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:39:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:39:51,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:39:51,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709116472] [2022-07-12 04:39:51,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:39:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:39:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:39:51,419 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) [2022-07-12 04:39:51,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:39:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:39:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:39:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 04:39:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:39:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 147 proven. 111 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-12 04:39:53,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:39:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-12 04:39:55,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:39:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742830400] [2022-07-12 04:39:55,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:39:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709116472] [2022-07-12 04:39:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709116472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:39:55,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:39:55,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-07-12 04:39:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363816305] [2022-07-12 04:39:55,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:39:55,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:39:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:39:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:39:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:39:55,028 INFO L87 Difference]: Start difference. First operand 1519 states and 1924 transitions. Second operand has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-12 04:40:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:40:14,967 INFO L93 Difference]: Finished difference Result 1639 states and 2065 transitions. [2022-07-12 04:40:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 04:40:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) Word has length 130 [2022-07-12 04:40:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:40:14,972 INFO L225 Difference]: With dead ends: 1639 [2022-07-12 04:40:14,972 INFO L226 Difference]: Without dead ends: 1599 [2022-07-12 04:40:14,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:40:14,973 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 132 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:40:14,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 499 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-07-12 04:40:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-07-12 04:40:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1348. [2022-07-12 04:40:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 855 states have (on average 1.1321637426900584) internal successors, (968), 870 states have internal predecessors, (968), 350 states have call successors, (350), 142 states have call predecessors, (350), 142 states have return successors, (348), 335 states have call predecessors, (348), 348 states have call successors, (348) [2022-07-12 04:40:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1666 transitions. [2022-07-12 04:40:15,185 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1666 transitions. Word has length 130 [2022-07-12 04:40:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:40:15,185 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1666 transitions. [2022-07-12 04:40:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-12 04:40:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1666 transitions. [2022-07-12 04:40:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 04:40:15,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:40:15,187 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:40:15,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-12 04:40:15,404 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 [2022-07-12 04:40:15,404 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:40:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:40:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 724097753, now seen corresponding path program 3 times [2022-07-12 04:40:15,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:40:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756606354] [2022-07-12 04:40:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:40:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:40:15,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:40:15,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575699718] [2022-07-12 04:40:15,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:40:15,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:40:15,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:40:15,413 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) [2022-07-12 04:40:15,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:40:15,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:40:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:40:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-12 04:40:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:40:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 86 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-07-12 04:40:27,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:41:27,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:41:27,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756606354] [2022-07-12 04:41:27,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:41:27,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575699718] [2022-07-12 04:41:27,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575699718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:41:27,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:41:27,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 04:41:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650115110] [2022-07-12 04:41:27,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:41:27,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:41:27,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:41:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:41:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=592, Unknown=14, NotChecked=0, Total=756 [2022-07-12 04:41:27,869 INFO L87 Difference]: Start difference. First operand 1348 states and 1666 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-12 04:41:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:41:40,375 INFO L93 Difference]: Finished difference Result 1867 states and 2281 transitions. [2022-07-12 04:41:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 04:41:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 147 [2022-07-12 04:41:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:41:40,401 INFO L225 Difference]: With dead ends: 1867 [2022-07-12 04:41:40,401 INFO L226 Difference]: Without dead ends: 1865 [2022-07-12 04:41:40,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=227, Invalid=948, Unknown=15, NotChecked=0, Total=1190 [2022-07-12 04:41:40,403 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:41:40,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 403 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-07-12 04:41:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-07-12 04:41:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1844. [2022-07-12 04:41:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1177 states have (on average 1.1163976210705182) internal successors, (1314), 1191 states have internal predecessors, (1314), 470 states have call successors, (470), 196 states have call predecessors, (470), 196 states have return successors, (468), 456 states have call predecessors, (468), 468 states have call successors, (468) [2022-07-12 04:41:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2252 transitions. [2022-07-12 04:41:40,716 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2252 transitions. Word has length 147 [2022-07-12 04:41:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:41:40,716 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2252 transitions. [2022-07-12 04:41:40,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-12 04:41:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2252 transitions. [2022-07-12 04:41:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-12 04:41:40,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:41:40,718 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:41:40,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 04:41:40,924 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 [2022-07-12 04:41:40,924 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:41:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:41:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2022-07-12 04:41:40,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:41:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609067246] [2022-07-12 04:41:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:41:40,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:41:40,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:41:40,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823651829] [2022-07-12 04:41:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:41:40,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:41:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:41:40,939 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) [2022-07-12 04:41:40,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 04:41:41,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:41:41,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:41:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 04:41:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:41:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 286 proven. 176 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-07-12 04:41:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:41:51,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:41:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609067246] [2022-07-12 04:41:51,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:41:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823651829] [2022-07-12 04:41:51,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823651829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:41:51,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:41:51,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 04:41:51,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525161631] [2022-07-12 04:41:51,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:41:51,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:41:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:41:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:41:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:41:51,619 INFO L87 Difference]: Start difference. First operand 1844 states and 2252 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-12 04:41:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:41:55,323 INFO L93 Difference]: Finished difference Result 2013 states and 2429 transitions. [2022-07-12 04:41:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:41:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 170 [2022-07-12 04:41:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:41:55,329 INFO L225 Difference]: With dead ends: 2013 [2022-07-12 04:41:55,329 INFO L226 Difference]: Without dead ends: 2011 [2022-07-12 04:41:55,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2022-07-12 04:41:55,333 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 47 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:41:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 378 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 807 Invalid, 0 Unknown, 77 Unchecked, 1.2s Time] [2022-07-12 04:41:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-07-12 04:41:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 2003. [2022-07-12 04:41:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 1281 states have (on average 1.1124121779859484) internal successors, (1425), 1295 states have internal predecessors, (1425), 498 states have call successors, (498), 223 states have call predecessors, (498), 223 states have return successors, (496), 484 states have call predecessors, (496), 496 states have call successors, (496) [2022-07-12 04:41:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2419 transitions. [2022-07-12 04:41:55,697 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2419 transitions. Word has length 170 [2022-07-12 04:41:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:41:55,698 INFO L495 AbstractCegarLoop]: Abstraction has 2003 states and 2419 transitions. [2022-07-12 04:41:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-12 04:41:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2419 transitions. [2022-07-12 04:41:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-12 04:41:55,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:41:55,704 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:41:55,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 04:41:55,922 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 [2022-07-12 04:41:55,922 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:41:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:41:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -164722535, now seen corresponding path program 5 times [2022-07-12 04:41:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:41:55,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608580470] [2022-07-12 04:41:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:41:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:41:55,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:41:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325791892] [2022-07-12 04:41:55,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:41:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:41:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:41:55,932 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) [2022-07-12 04:41:55,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 04:41:56,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 04:41:56,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:41:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-12 04:41:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:41:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 115 proven. 232 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-07-12 04:41:58,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:46,328 WARN L233 SmtUtils]: Spent 9.65s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:43:29,081 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:43:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 135 proven. 201 refuted. 11 times theorem prover too weak. 856 trivial. 0 not checked. [2022-07-12 04:43:32,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608580470] [2022-07-12 04:43:32,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325791892] [2022-07-12 04:43:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325791892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:32,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:32,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-07-12 04:43:32,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312278347] [2022-07-12 04:43:32,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:32,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:43:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:43:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=866, Unknown=11, NotChecked=0, Total=1122 [2022-07-12 04:43:32,156 INFO L87 Difference]: Start difference. First operand 2003 states and 2419 transitions. Second operand has 34 states, 32 states have (on average 2.5625) internal successors, (82), 30 states have internal predecessors, (82), 17 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (52), 19 states have call predecessors, (52), 16 states have call successors, (52) [2022-07-12 04:43:34,201 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 [] [2022-07-12 04:43:36,423 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 []