./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 17:19:10,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 17:19:10,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 17:19:10,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 17:19:10,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 17:19:10,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 17:19:10,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 17:19:10,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 17:19:10,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 17:19:10,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 17:19:10,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 17:19:10,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 17:19:10,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 17:19:10,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 17:19:10,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 17:19:10,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 17:19:10,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 17:19:10,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 17:19:10,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 17:19:10,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 17:19:10,760 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 17:19:10,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 17:19:10,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 17:19:10,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 17:19:10,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 17:19:10,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 17:19:10,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 17:19:10,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 17:19:10,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 17:19:10,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 17:19:10,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 17:19:10,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 17:19:10,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 17:19:10,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 17:19:10,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 17:19:10,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 17:19:10,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 17:19:10,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 17:19:10,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 17:19:10,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 17:19:10,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 17:19:10,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 17:19:10,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 17:19:10,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 17:19:10,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 17:19:10,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 17:19:10,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 17:19:10,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 17:19:10,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 17:19:10,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 17:19:10,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 17:19:10,805 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 17:19:10,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 17:19:10,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 17:19:10,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 17:19:10,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 17:19:10,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 17:19:10,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 17:19:10,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 17:19:10,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 17:19:10,807 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 17:19:10,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 17:19:10,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 17:19:10,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 17:19:10,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 17:19:10,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 17:19:10,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 17:19:10,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 17:19:10,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 17:19:10,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 17:19:10,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 17:19:10,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 17:19:10,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 17:19:10,810 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 17:19:10,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 17:19:10,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 17:19:10,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2022-07-12 17:19:11,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 17:19:11,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 17:19:11,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 17:19:11,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 17:19:11,041 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 17:19:11,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-07-12 17:19:11,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8946975d8/f2ad98d1dab54223826216f0e7d98a2f/FLAG9923eb7b8 [2022-07-12 17:19:11,510 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 17:19:11,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-07-12 17:19:11,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8946975d8/f2ad98d1dab54223826216f0e7d98a2f/FLAG9923eb7b8 [2022-07-12 17:19:11,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8946975d8/f2ad98d1dab54223826216f0e7d98a2f [2022-07-12 17:19:11,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 17:19:11,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 17:19:11,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 17:19:11,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 17:19:11,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 17:19:11,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:19:11" (1/1) ... [2022-07-12 17:19:11,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e20473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:11, skipping insertion in model container [2022-07-12 17:19:11,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:19:11" (1/1) ... [2022-07-12 17:19:11,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 17:19:11,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 17:19:12,136 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/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-07-12 17:19:12,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 17:19:12,270 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 17:19:12,300 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/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-07-12 17:19:12,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 17:19:12,388 INFO L208 MainTranslator]: Completed translation [2022-07-12 17:19:12,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12 WrapperNode [2022-07-12 17:19:12,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 17:19:12,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 17:19:12,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 17:19:12,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 17:19:12,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,509 INFO L137 Inliner]: procedures = 177, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1308 [2022-07-12 17:19:12,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 17:19:12,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 17:19:12,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 17:19:12,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 17:19:12,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 17:19:12,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 17:19:12,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 17:19:12,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 17:19:12,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (1/1) ... [2022-07-12 17:19:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 17:19:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:12,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 17:19:12,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 17:19:12,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 17:19:12,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 17:19:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-12 17:19:12,683 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 17:19:12,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 17:19:12,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 17:19:12,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 17:19:12,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 17:19:12,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 17:19:12,889 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 17:19:12,901 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 17:19:13,890 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 17:19:13,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 17:19:13,900 INFO L299 CfgBuilder]: Removed 69 assume(true) statements. [2022-07-12 17:19:13,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:19:13 BoogieIcfgContainer [2022-07-12 17:19:13,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 17:19:13,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 17:19:13,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 17:19:13,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 17:19:13,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 05:19:11" (1/3) ... [2022-07-12 17:19:13,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae49304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:19:13, skipping insertion in model container [2022-07-12 17:19:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:12" (2/3) ... [2022-07-12 17:19:13,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae49304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:19:13, skipping insertion in model container [2022-07-12 17:19:13,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:19:13" (3/3) ... [2022-07-12 17:19:13,909 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-2.i [2022-07-12 17:19:13,918 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 17:19:13,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 17:19:13,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 17:19:13,967 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@568bda4a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a2e4652 [2022-07-12 17:19:13,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 17:19:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 17:19:13,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:13,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:13,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1526554564, now seen corresponding path program 1 times [2022-07-12 17:19:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:13,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123215380] [2022-07-12 17:19:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123215380] [2022-07-12 17:19:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123215380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:14,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 17:19:14,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502664175] [2022-07-12 17:19:14,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:14,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 17:19:14,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 17:19:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:14,106 INFO L87 Difference]: Start difference. First operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:14,177 INFO L93 Difference]: Finished difference Result 648 states and 1103 transitions. [2022-07-12 17:19:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 17:19:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 17:19:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:14,197 INFO L225 Difference]: With dead ends: 648 [2022-07-12 17:19:14,197 INFO L226 Difference]: Without dead ends: 377 [2022-07-12 17:19:14,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:14,206 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 211 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:14,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 652 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 17:19:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-12 17:19:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-07-12 17:19:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-07-12 17:19:14,250 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-07-12 17:19:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:14,250 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-07-12 17:19:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-07-12 17:19:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 17:19:14,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:14,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 17:19:14,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1951190789, now seen corresponding path program 1 times [2022-07-12 17:19:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:14,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041595858] [2022-07-12 17:19:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:14,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356720303] [2022-07-12 17:19:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:14,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:14,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:14,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 17:19:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 17:19:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:15,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:15,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041595858] [2022-07-12 17:19:15,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:15,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356720303] [2022-07-12 17:19:15,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356720303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:15,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:15,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 17:19:15,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247018361] [2022-07-12 17:19:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:15,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 17:19:15,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 17:19:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:15,327 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:15,377 INFO L93 Difference]: Finished difference Result 434 states and 592 transitions. [2022-07-12 17:19:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 17:19:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-12 17:19:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:15,379 INFO L225 Difference]: With dead ends: 434 [2022-07-12 17:19:15,379 INFO L226 Difference]: Without dead ends: 229 [2022-07-12 17:19:15,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:15,381 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:15,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 507 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 17:19:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-12 17:19:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-07-12 17:19:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 209 states have (on average 1.291866028708134) internal successors, (270), 219 states have internal predecessors, (270), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2022-07-12 17:19:15,405 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 108 [2022-07-12 17:19:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2022-07-12 17:19:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2022-07-12 17:19:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 17:19:15,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:15,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:15,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:15,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -724801593, now seen corresponding path program 1 times [2022-07-12 17:19:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478253930] [2022-07-12 17:19:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:15,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:15,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498979398] [2022-07-12 17:19:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:15,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:15,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 17:19:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 17:19:16,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:16,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478253930] [2022-07-12 17:19:16,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498979398] [2022-07-12 17:19:16,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498979398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:16,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:16,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 17:19:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102541380] [2022-07-12 17:19:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:16,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 17:19:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 17:19:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:16,725 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:16,815 INFO L93 Difference]: Finished difference Result 474 states and 632 transitions. [2022-07-12 17:19:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 17:19:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-12 17:19:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:16,817 INFO L225 Difference]: With dead ends: 474 [2022-07-12 17:19:16,817 INFO L226 Difference]: Without dead ends: 249 [2022-07-12 17:19:16,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:16,819 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 8 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:16,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 509 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 17:19:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-12 17:19:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-07-12 17:19:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 229 states have (on average 1.2663755458515285) internal successors, (290), 239 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 322 transitions. [2022-07-12 17:19:16,830 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 322 transitions. Word has length 108 [2022-07-12 17:19:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:16,831 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 322 transitions. [2022-07-12 17:19:16,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 322 transitions. [2022-07-12 17:19:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 17:19:16,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:16,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:16,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:17,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 17:19:17,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash -652415035, now seen corresponding path program 1 times [2022-07-12 17:19:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767923716] [2022-07-12 17:19:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:17,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833783236] [2022-07-12 17:19:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:17,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:17,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:17,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 17:19:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 17:19:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:18,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:18,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:18,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767923716] [2022-07-12 17:19:18,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:18,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833783236] [2022-07-12 17:19:18,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833783236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:18,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:18,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 17:19:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2409919] [2022-07-12 17:19:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:18,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 17:19:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 17:19:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 17:19:18,255 INFO L87 Difference]: Start difference. First operand 248 states and 322 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:18,310 INFO L93 Difference]: Finished difference Result 485 states and 633 transitions. [2022-07-12 17:19:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 17:19:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-12 17:19:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:18,311 INFO L225 Difference]: With dead ends: 485 [2022-07-12 17:19:18,311 INFO L226 Difference]: Without dead ends: 240 [2022-07-12 17:19:18,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 17:19:18,313 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 228 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:18,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 540 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 17:19:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-12 17:19:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-07-12 17:19:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 215 states have (on average 1.2511627906976743) internal successors, (269), 225 states have internal predecessors, (269), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2022-07-12 17:19:18,321 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 108 [2022-07-12 17:19:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:18,322 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2022-07-12 17:19:18,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2022-07-12 17:19:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 17:19:18,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:18,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:18,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 17:19:18,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:18,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:18,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2044262665, now seen corresponding path program 1 times [2022-07-12 17:19:18,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:18,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427937947] [2022-07-12 17:19:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:18,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:18,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487152515] [2022-07-12 17:19:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:18,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:18,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:18,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 17:19:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 17:19:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:19,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:19,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427937947] [2022-07-12 17:19:19,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487152515] [2022-07-12 17:19:19,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487152515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:19,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:19,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 17:19:19,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952048684] [2022-07-12 17:19:19,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:19,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 17:19:19,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 17:19:19,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 17:19:19,827 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:19,924 INFO L93 Difference]: Finished difference Result 546 states and 700 transitions. [2022-07-12 17:19:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 17:19:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-12 17:19:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:19,926 INFO L225 Difference]: With dead ends: 546 [2022-07-12 17:19:19,926 INFO L226 Difference]: Without dead ends: 315 [2022-07-12 17:19:19,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 17:19:19,927 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 220 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:19,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1028 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 17:19:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-12 17:19:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 220. [2022-07-12 17:19:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 201 states have (on average 1.2338308457711442) internal successors, (248), 211 states have internal predecessors, (248), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 17:19:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 280 transitions. [2022-07-12 17:19:19,937 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 280 transitions. Word has length 108 [2022-07-12 17:19:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:19,938 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 280 transitions. [2022-07-12 17:19:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 280 transitions. [2022-07-12 17:19:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 17:19:19,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:19,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:19,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:20,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 456470147, now seen corresponding path program 1 times [2022-07-12 17:19:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750854322] [2022-07-12 17:19:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:20,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642046034] [2022-07-12 17:19:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:20,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:20,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:20,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:20,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 17:19:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 17:19:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:21,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 17:19:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 17:19:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750854322] [2022-07-12 17:19:21,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642046034] [2022-07-12 17:19:21,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642046034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 17:19:21,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 17:19:21,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-12 17:19:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649483005] [2022-07-12 17:19:21,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 17:19:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 17:19:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 17:19:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-12 17:19:21,680 INFO L87 Difference]: Start difference. First operand 220 states and 280 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:21,759 INFO L93 Difference]: Finished difference Result 797 states and 999 transitions. [2022-07-12 17:19:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 17:19:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-12 17:19:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:21,764 INFO L225 Difference]: With dead ends: 797 [2022-07-12 17:19:21,764 INFO L226 Difference]: Without dead ends: 766 [2022-07-12 17:19:21,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-12 17:19:21,767 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1313 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:21,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 1000 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 17:19:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-07-12 17:19:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-07-12 17:19:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 729 states have (on average 1.2043895747599451) internal successors, (878), 739 states have internal predecessors, (878), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 17:19:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 946 transitions. [2022-07-12 17:19:21,790 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 946 transitions. Word has length 108 [2022-07-12 17:19:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:21,791 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 946 transitions. [2022-07-12 17:19:21,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 946 transitions. [2022-07-12 17:19:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-07-12 17:19:21,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:21,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:21,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:22,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2044829992, now seen corresponding path program 2 times [2022-07-12 17:19:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968150386] [2022-07-12 17:19:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:22,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:22,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841822957] [2022-07-12 17:19:22,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 17:19:22,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:22,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:22,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 17:19:24,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 17:19:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 17:19:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 17:19:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-07-12 17:19:25,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:25,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968150386] [2022-07-12 17:19:25,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841822957] [2022-07-12 17:19:25,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841822957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:25,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:25,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 17:19:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129852230] [2022-07-12 17:19:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 17:19:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 17:19:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 17:19:25,079 INFO L87 Difference]: Start difference. First operand 766 states and 946 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:25,358 INFO L93 Difference]: Finished difference Result 1385 states and 1717 transitions. [2022-07-12 17:19:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 17:19:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2022-07-12 17:19:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:25,361 INFO L225 Difference]: With dead ends: 1385 [2022-07-12 17:19:25,361 INFO L226 Difference]: Without dead ends: 764 [2022-07-12 17:19:25,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 17:19:25,363 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 65 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:25,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 728 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 17:19:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-12 17:19:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2022-07-12 17:19:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 727 states have (on average 1.203576341127923) internal successors, (875), 737 states have internal predecessors, (875), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 17:19:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 943 transitions. [2022-07-12 17:19:25,381 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 943 transitions. Word has length 402 [2022-07-12 17:19:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:25,381 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 943 transitions. [2022-07-12 17:19:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 17:19:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 943 transitions. [2022-07-12 17:19:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-12 17:19:25,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:25,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:25,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:25,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2065716649, now seen corresponding path program 1 times [2022-07-12 17:19:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371372296] [2022-07-12 17:19:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:26,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:26,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436646330] [2022-07-12 17:19:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:26,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:26,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:26,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 17:19:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 17:19:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 10791 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 17:19:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 17:19:29,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 17:19:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 586 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 17:19:30,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371372296] [2022-07-12 17:19:30,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436646330] [2022-07-12 17:19:30,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436646330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 17:19:30,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 17:19:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 17:19:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703761318] [2022-07-12 17:19:30,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 17:19:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 17:19:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 17:19:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-12 17:19:30,215 INFO L87 Difference]: Start difference. First operand 764 states and 943 transitions. Second operand has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 17:19:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:30,400 INFO L93 Difference]: Finished difference Result 1887 states and 2331 transitions. [2022-07-12 17:19:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 17:19:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 417 [2022-07-12 17:19:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:30,408 INFO L225 Difference]: With dead ends: 1887 [2022-07-12 17:19:30,408 INFO L226 Difference]: Without dead ends: 1856 [2022-07-12 17:19:30,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-12 17:19:30,409 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 2743 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2799 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:30,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2799 Valid, 2395 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 17:19:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2022-07-12 17:19:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1856. [2022-07-12 17:19:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1783 states have (on average 1.1974200785193494) internal successors, (2135), 1793 states have internal predecessors, (2135), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-12 17:19:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2275 transitions. [2022-07-12 17:19:30,491 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2275 transitions. Word has length 417 [2022-07-12 17:19:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:30,491 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2275 transitions. [2022-07-12 17:19:30,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.33333333333333) internal successors, (808), 12 states have internal predecessors, (808), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 17:19:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2275 transitions. [2022-07-12 17:19:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2022-07-12 17:19:30,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:30,513 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:30,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:30,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:30,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -613485165, now seen corresponding path program 2 times [2022-07-12 17:19:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457918274] [2022-07-12 17:19:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:31,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984848352] [2022-07-12 17:19:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 17:19:31,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:31,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:31,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:31,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 17:19:39,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 17:19:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 17:19:39,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 28173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 17:19:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 17:19:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2022-07-12 17:19:40,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 17:19:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 17:19:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457918274] [2022-07-12 17:19:40,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 17:19:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984848352] [2022-07-12 17:19:40,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984848352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 17:19:40,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 17:19:40,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 17:19:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060422539] [2022-07-12 17:19:40,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 17:19:40,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 17:19:40,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 17:19:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 17:19:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:40,075 INFO L87 Difference]: Start difference. First operand 1856 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 17:19:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 17:19:40,135 INFO L93 Difference]: Finished difference Result 3654 states and 4484 transitions. [2022-07-12 17:19:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 17:19:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 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 1005 [2022-07-12 17:19:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 17:19:40,142 INFO L225 Difference]: With dead ends: 3654 [2022-07-12 17:19:40,142 INFO L226 Difference]: Without dead ends: 1854 [2022-07-12 17:19:40,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 17:19:40,147 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 15 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 17:19:40,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 517 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 17:19:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-07-12 17:19:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2022-07-12 17:19:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1781 states have (on average 1.197080291970803) internal successors, (2132), 1791 states have internal predecessors, (2132), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-12 17:19:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2272 transitions. [2022-07-12 17:19:40,190 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2272 transitions. Word has length 1005 [2022-07-12 17:19:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 17:19:40,190 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 2272 transitions. [2022-07-12 17:19:40,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 17:19:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2272 transitions. [2022-07-12 17:19:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2022-07-12 17:19:40,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 17:19:40,202 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 17:19:40,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 17:19:40,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 17:19:40,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 17:19:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 17:19:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -213100270, now seen corresponding path program 1 times [2022-07-12 17:19:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 17:19:40,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295872925] [2022-07-12 17:19:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 17:19:41,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 17:19:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661134494] [2022-07-12 17:19:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 17:19:41,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 17:19:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 17:19:41,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 17:19:41,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process