./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.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 2d26d8e14d33b8c29eaf9ffa7603dd26966f962451e6c0726b154a73bf65f3d2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:21:49,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:21:49,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:21:49,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:21:49,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:21:49,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:21:49,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:21:49,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:21:49,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:21:49,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:21:49,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:21:49,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:21:49,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:21:49,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:21:49,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:21:49,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:21:49,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:21:49,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:21:49,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:21:49,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:21:49,810 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:21:49,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:21:49,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:21:49,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:21:49,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:21:49,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:21:49,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:21:49,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:21:49,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:21:49,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:21:49,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:21:49,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:21:49,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:21:49,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:21:49,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:21:49,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:21:49,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:21:49,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:21:49,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:21:49,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:21:49,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:21:49,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:21:49,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:21:49,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:21:49,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:21:49,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:21:49,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:21:49,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:21:49,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:21:49,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:21:49,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:21:49,865 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:21:49,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:21:49,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:21:49,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:21:49,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:21:49,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:21:49,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:21:49,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:21:49,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:21:49,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:21:49,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:21:49,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:21:49,869 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:21:49,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:21:49,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:21:49,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d26d8e14d33b8c29eaf9ffa7603dd26966f962451e6c0726b154a73bf65f3d2 [2022-07-21 03:21:50,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:21:50,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:21:50,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:21:50,241 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:21:50,243 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:21:50,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-07-21 03:21:50,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ecc7dd/836e628aa72849e29567f42f2a01c86e/FLAG83d0ecc7b [2022-07-21 03:21:50,679 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:21:50,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-07-21 03:21:50,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ecc7dd/836e628aa72849e29567f42f2a01c86e/FLAG83d0ecc7b [2022-07-21 03:21:50,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ecc7dd/836e628aa72849e29567f42f2a01c86e [2022-07-21 03:21:50,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:21:50,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:21:50,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:21:50,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:21:50,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:21:50,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:50,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10aaf45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50, skipping insertion in model container [2022-07-21 03:21:50,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:50,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:21:50,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:21:50,866 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/egcd-ll_unwindbound50.c[489,502] [2022-07-21 03:21:50,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:21:50,897 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:21:50,936 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/egcd-ll_unwindbound50.c[489,502] [2022-07-21 03:21:50,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:21:50,965 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:21:50,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50 WrapperNode [2022-07-21 03:21:50,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:21:50,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:21:50,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:21:50,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:21:50,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:50,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:50,993 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-07-21 03:21:50,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:21:50,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:21:50,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:21:50,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:21:51,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:21:51,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:21:51,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:21:51,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:21:51,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (1/1) ... [2022-07-21 03:21:51,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:21:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:51,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 03:21:51,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 03:21:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:21:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:21:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:21:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:21:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:21:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:21:51,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:21:51,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:21:51,182 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:21:51,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:21:51,346 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:21:51,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:21:51,351 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 03:21:51,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:21:51 BoogieIcfgContainer [2022-07-21 03:21:51,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:21:51,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:21:51,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:21:51,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:21:51,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:21:50" (1/3) ... [2022-07-21 03:21:51,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43192883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:21:51, skipping insertion in model container [2022-07-21 03:21:51,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:21:50" (2/3) ... [2022-07-21 03:21:51,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43192883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:21:51, skipping insertion in model container [2022-07-21 03:21:51,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:21:51" (3/3) ... [2022-07-21 03:21:51,368 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2022-07-21 03:21:51,378 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:21:51,391 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:21:51,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:21:51,469 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@3b7ec6c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@129f5686 [2022-07-21 03:21:51,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:21:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:21:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 03:21:51,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:51,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:51,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1165920622, now seen corresponding path program 1 times [2022-07-21 03:21:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947841438] [2022-07-21 03:21:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:21:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 03:21:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:21:51,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:51,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947841438] [2022-07-21 03:21:51,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947841438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:51,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:21:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611474010] [2022-07-21 03:21:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:51,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:21:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:21:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:21:51,658 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:21:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:51,678 INFO L93 Difference]: Finished difference Result 57 states and 89 transitions. [2022-07-21 03:21:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:21:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 03:21:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:51,685 INFO L225 Difference]: With dead ends: 57 [2022-07-21 03:21:51,685 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 03:21:51,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:21:51,692 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:51,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 03:21:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 03:21:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 03:21:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-21 03:21:51,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 18 [2022-07-21 03:21:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-21 03:21:51,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:21:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-21 03:21:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 03:21:51,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:51,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:21:51,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash -542319922, now seen corresponding path program 1 times [2022-07-21 03:21:51,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:51,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242008498] [2022-07-21 03:21:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:21:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 03:21:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:21:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242008498] [2022-07-21 03:21:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242008498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:51,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:51,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:21:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344376808] [2022-07-21 03:21:51,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:51,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:21:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:21:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:21:51,847 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:21:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:51,863 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-07-21 03:21:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:21:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-21 03:21:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:51,864 INFO L225 Difference]: With dead ends: 38 [2022-07-21 03:21:51,864 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 03:21:51,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:21:51,865 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:51,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 03:21:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 03:21:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 03:21:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-21 03:21:51,872 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 19 [2022-07-21 03:21:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:51,873 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-21 03:21:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:21:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-21 03:21:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 03:21:51,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:51,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 03:21:51,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -540651626, now seen corresponding path program 1 times [2022-07-21 03:21:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441446564] [2022-07-21 03:21:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:51,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785322543] [2022-07-21 03:21:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:51,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:51,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:51,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:51,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:21:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:21:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:21:52,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:21:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441446564] [2022-07-21 03:21:52,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785322543] [2022-07-21 03:21:52,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785322543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:52,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:21:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619394521] [2022-07-21 03:21:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:21:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:21:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:21:52,148 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:21:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:52,206 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-07-21 03:21:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:21:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-21 03:21:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:52,208 INFO L225 Difference]: With dead ends: 45 [2022-07-21 03:21:52,208 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 03:21:52,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:21:52,209 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:52,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 03:21:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-07-21 03:21:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 03:21:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2022-07-21 03:21:52,221 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2022-07-21 03:21:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:52,222 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2022-07-21 03:21:52,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:21:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2022-07-21 03:21:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 03:21:52,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:52,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:52,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash -276555716, now seen corresponding path program 1 times [2022-07-21 03:21:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342567986] [2022-07-21 03:21:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:52,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511721506] [2022-07-21 03:21:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:52,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:52,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:21:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:21:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 03:21:52,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:21:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342567986] [2022-07-21 03:21:52,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511721506] [2022-07-21 03:21:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511721506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 03:21:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164468334] [2022-07-21 03:21:52,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:21:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:21:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:21:52,650 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:21:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:52,753 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-07-21 03:21:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 03:21:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-21 03:21:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:52,754 INFO L225 Difference]: With dead ends: 49 [2022-07-21 03:21:52,755 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 03:21:52,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:21:52,756 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:52,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 156 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:21:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 03:21:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-21 03:21:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 03:21:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-07-21 03:21:52,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 24 [2022-07-21 03:21:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:52,764 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-07-21 03:21:52,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:21:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-07-21 03:21:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 03:21:52,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:52,765 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:52,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:52,983 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,SelfDestructingSolverStorable3 [2022-07-21 03:21:52,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1836785898, now seen corresponding path program 1 times [2022-07-21 03:21:52,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:52,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957164778] [2022-07-21 03:21:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:52,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:52,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:52,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084749465] [2022-07-21 03:21:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:52,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:52,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:52,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:21:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 03:21:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 03:21:53,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:21:53,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957164778] [2022-07-21 03:21:53,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084749465] [2022-07-21 03:21:53,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084749465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:53,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:53,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 03:21:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842825830] [2022-07-21 03:21:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:53,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:21:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:21:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:21:53,244 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:21:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:53,375 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2022-07-21 03:21:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:21:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-21 03:21:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:53,379 INFO L225 Difference]: With dead ends: 71 [2022-07-21 03:21:53,379 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 03:21:53,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:21:53,380 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:53,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 134 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:21:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 03:21:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-21 03:21:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 39 states have internal predecessors, (47), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-21 03:21:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2022-07-21 03:21:53,395 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 29 [2022-07-21 03:21:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:53,396 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2022-07-21 03:21:53,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:21:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2022-07-21 03:21:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 03:21:53,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:53,398 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:53,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 03:21:53,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:53,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1071030291, now seen corresponding path program 1 times [2022-07-21 03:21:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148555071] [2022-07-21 03:21:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:53,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838801679] [2022-07-21 03:21:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:53,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:53,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:53,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:53,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:21:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:21:53,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:21:53,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:21:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148555071] [2022-07-21 03:21:53,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838801679] [2022-07-21 03:21:53,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838801679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:53,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:53,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:21:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478446824] [2022-07-21 03:21:53,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:53,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:21:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:21:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:21:53,677 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 03:21:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:53,720 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2022-07-21 03:21:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:21:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-07-21 03:21:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:53,722 INFO L225 Difference]: With dead ends: 83 [2022-07-21 03:21:53,722 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 03:21:53,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:21:53,723 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:53,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 03:21:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-07-21 03:21:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 45 states have internal predecessors, (50), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-21 03:21:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-07-21 03:21:53,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 35 [2022-07-21 03:21:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:53,734 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-07-21 03:21:53,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 03:21:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-07-21 03:21:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:21:53,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:53,735 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:53,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 03:21:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:53,953 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1689492770, now seen corresponding path program 1 times [2022-07-21 03:21:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:53,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360489121] [2022-07-21 03:21:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:53,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:53,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912517258] [2022-07-21 03:21:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:53,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:53,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:21:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:21:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:21:54,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:21:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360489121] [2022-07-21 03:21:54,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912517258] [2022-07-21 03:21:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912517258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:21:54,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:21:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 03:21:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991717190] [2022-07-21 03:21:54,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:21:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:21:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:21:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:21:54,126 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 03:21:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:54,234 INFO L93 Difference]: Finished difference Result 218 states and 286 transitions. [2022-07-21 03:21:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 03:21:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 38 [2022-07-21 03:21:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:54,236 INFO L225 Difference]: With dead ends: 218 [2022-07-21 03:21:54,236 INFO L226 Difference]: Without dead ends: 196 [2022-07-21 03:21:54,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:21:54,237 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:54,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 213 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:21:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-21 03:21:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2022-07-21 03:21:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 119 states have internal predecessors, (132), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2022-07-21 03:21:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 247 transitions. [2022-07-21 03:21:54,263 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 247 transitions. Word has length 38 [2022-07-21 03:21:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:54,264 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 247 transitions. [2022-07-21 03:21:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-21 03:21:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 247 transitions. [2022-07-21 03:21:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:21:54,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:54,273 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:54,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:54,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1691161066, now seen corresponding path program 1 times [2022-07-21 03:21:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:54,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141153126] [2022-07-21 03:21:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:54,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:54,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402389903] [2022-07-21 03:21:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:54,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:21:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 03:21:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:21:54,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:21:54,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141153126] [2022-07-21 03:21:54,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402389903] [2022-07-21 03:21:54,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402389903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:21:54,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:21:54,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:21:54,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885595610] [2022-07-21 03:21:54,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:21:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:21:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:21:54,657 INFO L87 Difference]: Start difference. First operand 190 states and 247 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:21:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:54,706 INFO L93 Difference]: Finished difference Result 204 states and 260 transitions. [2022-07-21 03:21:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:21:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 38 [2022-07-21 03:21:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:54,709 INFO L225 Difference]: With dead ends: 204 [2022-07-21 03:21:54,709 INFO L226 Difference]: Without dead ends: 199 [2022-07-21 03:21:54,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:21:54,712 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:54,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-21 03:21:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-07-21 03:21:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 117 states have (on average 1.205128205128205) internal successors, (141), 128 states have internal predecessors, (141), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-07-21 03:21:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2022-07-21 03:21:54,751 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 38 [2022-07-21 03:21:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:54,751 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2022-07-21 03:21:54,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:21:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2022-07-21 03:21:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 03:21:54,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:54,753 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-07-21 03:21:54,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:54,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:54,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1925895455, now seen corresponding path program 1 times [2022-07-21 03:21:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:54,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904231045] [2022-07-21 03:21:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:54,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:54,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484159776] [2022-07-21 03:21:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:54,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:54,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:54,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:54,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:21:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 03:21:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:21:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:21:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904231045] [2022-07-21 03:21:55,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484159776] [2022-07-21 03:21:55,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484159776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:21:55,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:21:55,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 03:21:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535127147] [2022-07-21 03:21:55,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:21:55,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:21:55,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:21:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:21:55,181 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 03:21:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:55,305 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2022-07-21 03:21:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 03:21:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2022-07-21 03:21:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:55,307 INFO L225 Difference]: With dead ends: 228 [2022-07-21 03:21:55,307 INFO L226 Difference]: Without dead ends: 212 [2022-07-21 03:21:55,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:21:55,310 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:55,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:21:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-21 03:21:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2022-07-21 03:21:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 138 states have internal predecessors, (148), 57 states have call successors, (57), 25 states have call predecessors, (57), 25 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-21 03:21:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 258 transitions. [2022-07-21 03:21:55,342 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 258 transitions. Word has length 40 [2022-07-21 03:21:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:55,343 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 258 transitions. [2022-07-21 03:21:55,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 03:21:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 258 transitions. [2022-07-21 03:21:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 03:21:55,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:55,347 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:55,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:55,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash 968731240, now seen corresponding path program 2 times [2022-07-21 03:21:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:55,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545059750] [2022-07-21 03:21:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:55,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:55,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186231394] [2022-07-21 03:21:55,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:21:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:55,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:55,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:21:55,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:21:55,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:21:55,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 03:21:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:21:55,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:21:55,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545059750] [2022-07-21 03:21:55,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186231394] [2022-07-21 03:21:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186231394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:21:55,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:21:55,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-21 03:21:55,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747448466] [2022-07-21 03:21:55,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:21:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:21:55,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:21:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:21:55,808 INFO L87 Difference]: Start difference. First operand 210 states and 258 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 03:21:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:56,456 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2022-07-21 03:21:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 03:21:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 43 [2022-07-21 03:21:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:56,458 INFO L225 Difference]: With dead ends: 249 [2022-07-21 03:21:56,458 INFO L226 Difference]: Without dead ends: 225 [2022-07-21 03:21:56,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:21:56,459 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:56,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 137 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 03:21:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-21 03:21:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2022-07-21 03:21:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 141 states have internal predecessors, (150), 45 states have call successors, (45), 27 states have call predecessors, (45), 27 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-21 03:21:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2022-07-21 03:21:56,476 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 43 [2022-07-21 03:21:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:56,477 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2022-07-21 03:21:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 03:21:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2022-07-21 03:21:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 03:21:56,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:56,478 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:56,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:56,696 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,SelfDestructingSolverStorable9 [2022-07-21 03:21:56,696 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash -715006568, now seen corresponding path program 1 times [2022-07-21 03:21:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436488328] [2022-07-21 03:21:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:56,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180305491] [2022-07-21 03:21:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:56,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:56,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:56,720 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:56,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:21:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:21:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 03:21:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 03:21:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-21 03:21:57,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436488328] [2022-07-21 03:21:57,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180305491] [2022-07-21 03:21:57,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180305491] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:21:57,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:21:57,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-07-21 03:21:57,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215331363] [2022-07-21 03:21:57,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:21:57,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:21:57,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:21:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:21:57,054 INFO L87 Difference]: Start difference. First operand 206 states and 236 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) [2022-07-21 03:21:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:57,100 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2022-07-21 03:21:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:21:57,101 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 57 [2022-07-21 03:21:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:57,102 INFO L225 Difference]: With dead ends: 212 [2022-07-21 03:21:57,102 INFO L226 Difference]: Without dead ends: 188 [2022-07-21 03:21:57,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:21:57,103 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:57,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:21:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-21 03:21:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-07-21 03:21:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 128 states have internal predecessors, (138), 36 states have call successors, (36), 24 states have call predecessors, (36), 24 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-21 03:21:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 208 transitions. [2022-07-21 03:21:57,138 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 208 transitions. Word has length 57 [2022-07-21 03:21:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:57,139 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 208 transitions. [2022-07-21 03:21:57,155 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) [2022-07-21 03:21:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 208 transitions. [2022-07-21 03:21:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 03:21:57,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:57,157 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:57,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 03:21:57,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:57,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash 985491918, now seen corresponding path program 2 times [2022-07-21 03:21:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:57,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791812692] [2022-07-21 03:21:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:57,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135709527] [2022-07-21 03:21:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:21:57,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:57,378 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:21:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:21:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:21:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 03:21:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 03:21:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-21 03:21:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:57,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791812692] [2022-07-21 03:21:57,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:57,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135709527] [2022-07-21 03:21:57,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135709527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:21:57,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:21:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 03:21:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087172362] [2022-07-21 03:21:57,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:21:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:21:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:21:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:21:57,673 INFO L87 Difference]: Start difference. First operand 185 states and 208 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-21 03:21:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:57,923 INFO L93 Difference]: Finished difference Result 512 states and 601 transitions. [2022-07-21 03:21:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 03:21:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 95 [2022-07-21 03:21:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:57,926 INFO L225 Difference]: With dead ends: 512 [2022-07-21 03:21:57,926 INFO L226 Difference]: Without dead ends: 503 [2022-07-21 03:21:57,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-21 03:21:57,927 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 97 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:57,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 207 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:21:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-21 03:21:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-07-21 03:21:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 334 states have (on average 1.095808383233533) internal successors, (366), 344 states have internal predecessors, (366), 102 states have call successors, (102), 66 states have call predecessors, (102), 66 states have return successors, (100), 92 states have call predecessors, (100), 100 states have call successors, (100) [2022-07-21 03:21:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 568 transitions. [2022-07-21 03:21:57,967 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 568 transitions. Word has length 95 [2022-07-21 03:21:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:57,967 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 568 transitions. [2022-07-21 03:21:57,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-21 03:21:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 568 transitions. [2022-07-21 03:21:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-21 03:21:57,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:57,970 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:57,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:58,183 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,SelfDestructingSolverStorable11 [2022-07-21 03:21:58,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash 325062734, now seen corresponding path program 3 times [2022-07-21 03:21:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327551607] [2022-07-21 03:21:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:58,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944940348] [2022-07-21 03:21:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:21:58,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:58,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:58,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:21:58,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-21 03:21:58,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:21:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 03:21:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:21:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-21 03:21:58,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:21:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-07-21 03:21:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:21:58,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327551607] [2022-07-21 03:21:58,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:21:58,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944940348] [2022-07-21 03:21:58,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944940348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:21:58,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:21:58,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 03:21:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261243595] [2022-07-21 03:21:58,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:21:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 03:21:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:21:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 03:21:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-21 03:21:58,929 INFO L87 Difference]: Start difference. First operand 503 states and 568 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) [2022-07-21 03:21:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:21:59,511 INFO L93 Difference]: Finished difference Result 1148 states and 1345 transitions. [2022-07-21 03:21:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 03:21:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) Word has length 209 [2022-07-21 03:21:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:21:59,517 INFO L225 Difference]: With dead ends: 1148 [2022-07-21 03:21:59,517 INFO L226 Difference]: Without dead ends: 1139 [2022-07-21 03:21:59,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 03:21:59,519 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 327 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 03:21:59,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 342 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 03:21:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-21 03:21:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2022-07-21 03:21:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 754 states have (on average 1.090185676392573) internal successors, (822), 776 states have internal predecessors, (822), 234 states have call successors, (234), 150 states have call predecessors, (234), 150 states have return successors, (232), 212 states have call predecessors, (232), 232 states have call successors, (232) [2022-07-21 03:21:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1288 transitions. [2022-07-21 03:21:59,604 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1288 transitions. Word has length 209 [2022-07-21 03:21:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:21:59,604 INFO L495 AbstractCegarLoop]: Abstraction has 1139 states and 1288 transitions. [2022-07-21 03:21:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) [2022-07-21 03:21:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1288 transitions. [2022-07-21 03:21:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-07-21 03:21:59,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:21:59,613 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:21:59,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:21:59,826 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,SelfDestructingSolverStorable12 [2022-07-21 03:21:59,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:21:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:21:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash -767722162, now seen corresponding path program 4 times [2022-07-21 03:21:59,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:21:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854079485] [2022-07-21 03:21:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:21:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:21:59,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:21:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832572439] [2022-07-21 03:21:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 03:21:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:21:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:21:59,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:21:59,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:22:00,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 03:22:00,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:22:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 03:22:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-21 03:22:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-07-21 03:22:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854079485] [2022-07-21 03:22:01,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832572439] [2022-07-21 03:22:01,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832572439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:01,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:01,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-21 03:22:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015687308] [2022-07-21 03:22:01,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 03:22:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 03:22:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 03:22:01,421 INFO L87 Difference]: Start difference. First operand 1139 states and 1288 transitions. Second operand has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) [2022-07-21 03:22:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:03,170 INFO L93 Difference]: Finished difference Result 2420 states and 2833 transitions. [2022-07-21 03:22:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-21 03:22:03,171 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) Word has length 437 [2022-07-21 03:22:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:03,182 INFO L225 Difference]: With dead ends: 2420 [2022-07-21 03:22:03,183 INFO L226 Difference]: Without dead ends: 2411 [2022-07-21 03:22:03,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 03:22:03,187 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 689 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:03,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 800 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 03:22:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-07-21 03:22:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2411. [2022-07-21 03:22:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1594 states have (on average 1.0878293601003763) internal successors, (1734), 1640 states have internal predecessors, (1734), 498 states have call successors, (498), 318 states have call predecessors, (498), 318 states have return successors, (496), 452 states have call predecessors, (496), 496 states have call successors, (496) [2022-07-21 03:22:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 2728 transitions. [2022-07-21 03:22:03,426 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 2728 transitions. Word has length 437 [2022-07-21 03:22:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:03,427 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 2728 transitions. [2022-07-21 03:22:03,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) [2022-07-21 03:22:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 2728 transitions. [2022-07-21 03:22:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2022-07-21 03:22:03,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:03,454 INFO L195 NwaCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:03,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 03:22:03,667 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,SelfDestructingSolverStorable13 [2022-07-21 03:22:03,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash -776415410, now seen corresponding path program 5 times [2022-07-21 03:22:03,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:03,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115471850] [2022-07-21 03:22:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:03,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:03,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113188721] [2022-07-21 03:22:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 03:22:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:03,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process