./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 03b59b42cc833f5b28fc5dc7cc6711355c533ad94229ba44874c6d4d186d9dcb --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:28:19,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:28:19,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:28:19,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:28:19,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:28:19,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:28:19,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:28:19,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:28:19,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:28:19,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:28:19,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:28:19,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:28:19,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:28:19,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:28:19,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:28:19,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:28:19,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:28:19,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:28:19,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:28:19,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:28:19,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:28:19,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:28:19,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:28:19,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:28:19,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:28:19,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:28:19,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:28:19,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:28:19,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:28:19,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:28:19,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:28:19,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:28:19,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:28:19,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:28:19,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:28:19,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:28:19,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:28:19,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:28:19,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:28:19,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:28:19,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:28:19,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:28:19,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:28:19,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:28:19,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:28:19,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:28:19,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:28:19,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:28:19,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:28:19,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:28:19,667 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:28:19,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:28:19,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:28:19,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:28:19,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:28:19,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:28:19,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:28:19,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:19,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:28:19,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:28:19,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:28:19,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b59b42cc833f5b28fc5dc7cc6711355c533ad94229ba44874c6d4d186d9dcb [2021-12-14 17:28:19,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:28:19,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:28:19,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:28:19,891 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:28:19,892 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:28:19,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2021-12-14 17:28:19,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6399e1871/0319da96118444748444b496f21933f4/FLAG35a571421 [2021-12-14 17:28:20,491 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:28:20,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2021-12-14 17:28:20,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6399e1871/0319da96118444748444b496f21933f4/FLAG35a571421 [2021-12-14 17:28:20,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6399e1871/0319da96118444748444b496f21933f4 [2021-12-14 17:28:20,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:28:20,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:28:20,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:20,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:28:20,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:28:20,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:20" (1/1) ... [2021-12-14 17:28:20,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@584f54d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:20, skipping insertion in model container [2021-12-14 17:28:20,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:20" (1/1) ... [2021-12-14 17:28:20,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:28:21,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:28:21,952 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/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2021-12-14 17:28:22,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:22,028 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:28:22,240 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/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2021-12-14 17:28:22,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:22,312 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:28:22,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22 WrapperNode [2021-12-14 17:28:22,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:22,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:22,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:28:22,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:28:22,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,445 INFO L137 Inliner]: procedures = 157, calls = 812, calls flagged for inlining = 80, calls inlined = 79, statements flattened = 2776 [2021-12-14 17:28:22,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:22,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:28:22,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:28:22,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:28:22,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:28:22,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:28:22,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:28:22,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:28:22,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (1/1) ... [2021-12-14 17:28:22,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:22,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:22,571 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) [2021-12-14 17:28:22,579 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 [2021-12-14 17:28:22,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-14 17:28:22,598 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-14 17:28:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-12-14 17:28:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-12-14 17:28:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2021-12-14 17:28:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2021-12-14 17:28:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:28:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:28:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-14 17:28:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-14 17:28:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:28:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:28:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-14 17:28:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-14 17:28:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-14 17:28:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-14 17:28:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-12-14 17:28:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-12-14 17:28:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:28:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:28:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2021-12-14 17:28:22,601 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2021-12-14 17:28:22,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:28:22,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-14 17:28:22,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-14 17:28:22,601 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-12-14 17:28:22,601 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-12-14 17:28:22,601 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-14 17:28:22,601 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-14 17:28:22,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:28:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:28:22,602 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-14 17:28:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-14 17:28:22,602 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-14 17:28:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-14 17:28:22,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:28:22,602 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2021-12-14 17:28:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2021-12-14 17:28:22,602 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2021-12-14 17:28:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-14 17:28:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2021-12-14 17:28:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:28:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-14 17:28:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-12-14 17:28:22,604 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-12-14 17:28:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:28:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-14 17:28:22,605 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-14 17:28:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-14 17:28:22,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-14 17:28:22,606 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-12-14 17:28:22,606 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-12-14 17:28:22,606 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2021-12-14 17:28:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2021-12-14 17:28:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2021-12-14 17:28:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2021-12-14 17:28:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:28:22,632 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-14 17:28:22,632 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-14 17:28:22,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:28:22,632 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-12-14 17:28:22,632 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-12-14 17:28:22,633 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2021-12-14 17:28:22,633 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2021-12-14 17:28:22,633 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:28:22,633 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:28:22,633 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:28:22,633 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:28:22,633 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-14 17:28:22,633 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-14 17:28:22,634 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-14 17:28:22,634 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-14 17:28:22,634 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-14 17:28:22,634 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-14 17:28:22,634 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-14 17:28:22,634 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-14 17:28:22,634 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-14 17:28:22,634 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-14 17:28:22,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:28:22,635 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-14 17:28:22,635 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-14 17:28:22,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-14 17:28:22,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-14 17:28:22,636 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-14 17:28:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-14 17:28:22,636 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-12-14 17:28:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-12-14 17:28:22,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:28:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:28:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:28:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2021-12-14 17:28:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2021-12-14 17:28:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-14 17:28:22,638 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-14 17:28:23,042 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:28:23,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:28:24,705 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:28:24,714 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:28:24,714 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:28:24,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:28:24 BoogieIcfgContainer [2021-12-14 17:28:24,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:28:24,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:28:24,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:28:24,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:28:24,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:28:20" (1/3) ... [2021-12-14 17:28:24,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12ef1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:28:24, skipping insertion in model container [2021-12-14 17:28:24,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:22" (2/3) ... [2021-12-14 17:28:24,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12ef1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:28:24, skipping insertion in model container [2021-12-14 17:28:24,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:28:24" (3/3) ... [2021-12-14 17:28:24,722 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2021-12-14 17:28:24,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:28:24,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:28:24,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:28:24,762 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:28:24,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:28:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 964 states, 712 states have (on average 1.4297752808988764) internal successors, (1018), 739 states have internal predecessors, (1018), 207 states have call successors, (207), 43 states have call predecessors, (207), 43 states have return successors, (207), 205 states have call predecessors, (207), 207 states have call successors, (207) [2021-12-14 17:28:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 17:28:24,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:24,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:24,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1312205542, now seen corresponding path program 1 times [2021-12-14 17:28:24,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:24,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434539836] [2021-12-14 17:28:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:24,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:28:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:25,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434539836] [2021-12-14 17:28:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434539836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:25,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:25,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:28:25,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210435473] [2021-12-14 17:28:25,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:25,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:28:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:28:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:28:25,114 INFO L87 Difference]: Start difference. First operand has 964 states, 712 states have (on average 1.4297752808988764) internal successors, (1018), 739 states have internal predecessors, (1018), 207 states have call successors, (207), 43 states have call predecessors, (207), 43 states have return successors, (207), 205 states have call predecessors, (207), 207 states have call successors, (207) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 17:28:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:26,007 INFO L93 Difference]: Finished difference Result 1942 states and 2905 transitions. [2021-12-14 17:28:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:28:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-12-14 17:28:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:26,023 INFO L225 Difference]: With dead ends: 1942 [2021-12-14 17:28:26,023 INFO L226 Difference]: Without dead ends: 943 [2021-12-14 17:28:26,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:26,031 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 1570 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:26,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 1975 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:28:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-12-14 17:28:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 925. [2021-12-14 17:28:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 682 states have (on average 1.4193548387096775) internal successors, (968), 706 states have internal predecessors, (968), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2021-12-14 17:28:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1366 transitions. [2021-12-14 17:28:26,099 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1366 transitions. Word has length 59 [2021-12-14 17:28:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:26,099 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1366 transitions. [2021-12-14 17:28:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 17:28:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1366 transitions. [2021-12-14 17:28:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 17:28:26,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:26,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:28:26,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1735852264, now seen corresponding path program 1 times [2021-12-14 17:28:26,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113345127] [2021-12-14 17:28:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:26,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:28:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:26,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113345127] [2021-12-14 17:28:26,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113345127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:26,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:26,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:28:26,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731721445] [2021-12-14 17:28:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:26,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:28:26,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:28:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:26,236 INFO L87 Difference]: Start difference. First operand 925 states and 1366 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:28:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:27,327 INFO L93 Difference]: Finished difference Result 1851 states and 2740 transitions. [2021-12-14 17:28:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:28:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2021-12-14 17:28:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:27,335 INFO L225 Difference]: With dead ends: 1851 [2021-12-14 17:28:27,335 INFO L226 Difference]: Without dead ends: 943 [2021-12-14 17:28:27,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:28:27,345 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 367 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 3852 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:27,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 3852 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:28:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-12-14 17:28:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 925. [2021-12-14 17:28:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 682 states have (on average 1.4178885630498534) internal successors, (967), 706 states have internal predecessors, (967), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2021-12-14 17:28:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1365 transitions. [2021-12-14 17:28:27,393 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1365 transitions. Word has length 59 [2021-12-14 17:28:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:27,394 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1365 transitions. [2021-12-14 17:28:27,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:28:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1365 transitions. [2021-12-14 17:28:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 17:28:27,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:27,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:27,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:28:27,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1026212091, now seen corresponding path program 1 times [2021-12-14 17:28:27,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:27,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292186085] [2021-12-14 17:28:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:27,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:27,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292186085] [2021-12-14 17:28:27,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292186085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:27,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:27,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:28:27,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451652864] [2021-12-14 17:28:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:28:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:28:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:27,498 INFO L87 Difference]: Start difference. First operand 925 states and 1365 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-14 17:28:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:28,738 INFO L93 Difference]: Finished difference Result 1457 states and 2226 transitions. [2021-12-14 17:28:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:28:28,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2021-12-14 17:28:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:28,746 INFO L225 Difference]: With dead ends: 1457 [2021-12-14 17:28:28,747 INFO L226 Difference]: Without dead ends: 1455 [2021-12-14 17:28:28,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:28:28,752 INFO L933 BasicCegarLoop]: 2125 mSDtfsCounter, 1291 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:28,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1374 Valid, 5656 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:28:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-12-14 17:28:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 927. [2021-12-14 17:28:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 684 states have (on average 1.4166666666666667) internal successors, (969), 708 states have internal predecessors, (969), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2021-12-14 17:28:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1367 transitions. [2021-12-14 17:28:28,789 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1367 transitions. Word has length 62 [2021-12-14 17:28:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:28,791 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1367 transitions. [2021-12-14 17:28:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-14 17:28:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1367 transitions. [2021-12-14 17:28:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 17:28:28,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:28,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:28,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:28:28,794 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1878108753, now seen corresponding path program 1 times [2021-12-14 17:28:28,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094572731] [2021-12-14 17:28:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:28,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:28:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:28,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094572731] [2021-12-14 17:28:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094572731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:28,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:28,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:28:28,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422140783] [2021-12-14 17:28:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:28,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:28:28,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:28:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:28,938 INFO L87 Difference]: Start difference. First operand 927 states and 1367 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 17:28:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:30,435 INFO L93 Difference]: Finished difference Result 2367 states and 3571 transitions. [2021-12-14 17:28:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:28:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-12-14 17:28:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:30,445 INFO L225 Difference]: With dead ends: 2367 [2021-12-14 17:28:30,445 INFO L226 Difference]: Without dead ends: 1459 [2021-12-14 17:28:30,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:28:30,447 INFO L933 BasicCegarLoop]: 1805 mSDtfsCounter, 2187 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:30,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2457 Valid, 3389 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 17:28:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-12-14 17:28:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 928. [2021-12-14 17:28:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 685 states have (on average 1.416058394160584) internal successors, (970), 709 states have internal predecessors, (970), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2021-12-14 17:28:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1368 transitions. [2021-12-14 17:28:30,477 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1368 transitions. Word has length 72 [2021-12-14 17:28:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:30,477 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1368 transitions. [2021-12-14 17:28:30,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 17:28:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1368 transitions. [2021-12-14 17:28:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 17:28:30,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:30,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:30,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:28:30,480 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 45860082, now seen corresponding path program 1 times [2021-12-14 17:28:30,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841731335] [2021-12-14 17:28:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:30,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:30,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841731335] [2021-12-14 17:28:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841731335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:30,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:30,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:28:30,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062781128] [2021-12-14 17:28:30,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:30,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:28:30,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:28:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:28:30,581 INFO L87 Difference]: Start difference. First operand 928 states and 1368 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:28:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:32,418 INFO L93 Difference]: Finished difference Result 2238 states and 3479 transitions. [2021-12-14 17:28:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:28:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-14 17:28:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:32,429 INFO L225 Difference]: With dead ends: 2238 [2021-12-14 17:28:32,429 INFO L226 Difference]: Without dead ends: 2236 [2021-12-14 17:28:32,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:28:32,435 INFO L933 BasicCegarLoop]: 2532 mSDtfsCounter, 2700 mSDsluCounter, 6326 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2898 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:32,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2898 Valid, 8858 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 17:28:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-12-14 17:28:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 930. [2021-12-14 17:28:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 686 states have (on average 1.4154518950437318) internal successors, (971), 709 states have internal predecessors, (971), 200 states have call successors, (200), 43 states have call predecessors, (200), 43 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2021-12-14 17:28:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1371 transitions. [2021-12-14 17:28:32,477 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1371 transitions. Word has length 74 [2021-12-14 17:28:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1371 transitions. [2021-12-14 17:28:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:28:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1371 transitions. [2021-12-14 17:28:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 17:28:32,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:32,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:28:32,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2045364121, now seen corresponding path program 1 times [2021-12-14 17:28:32,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899895037] [2021-12-14 17:28:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:32,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:28:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:28:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:28:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:28:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 17:28:32,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899895037] [2021-12-14 17:28:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899895037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:32,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:32,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:28:32,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912104624] [2021-12-14 17:28:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:32,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:28:32,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:28:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:28:32,592 INFO L87 Difference]: Start difference. First operand 930 states and 1371 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:28:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:33,300 INFO L93 Difference]: Finished difference Result 1888 states and 2776 transitions. [2021-12-14 17:28:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:28:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-12-14 17:28:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:33,306 INFO L225 Difference]: With dead ends: 1888 [2021-12-14 17:28:33,306 INFO L226 Difference]: Without dead ends: 977 [2021-12-14 17:28:33,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:33,312 INFO L933 BasicCegarLoop]: 1315 mSDtfsCounter, 1471 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:33,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 1917 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 17:28:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-14 17:28:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 950. [2021-12-14 17:28:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 700 states have (on average 1.4071428571428573) internal successors, (985), 723 states have internal predecessors, (985), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1389 transitions. [2021-12-14 17:28:33,362 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1389 transitions. Word has length 104 [2021-12-14 17:28:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:33,362 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1389 transitions. [2021-12-14 17:28:33,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:28:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1389 transitions. [2021-12-14 17:28:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 17:28:33,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:33,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:33,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:28:33,372 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1129591135, now seen corresponding path program 1 times [2021-12-14 17:28:33,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645666600] [2021-12-14 17:28:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:33,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:28:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:28:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:28:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:28:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 17:28:33,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645666600] [2021-12-14 17:28:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645666600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:33,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:33,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:28:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073016815] [2021-12-14 17:28:33,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:33,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:28:33,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:28:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:33,515 INFO L87 Difference]: Start difference. First operand 950 states and 1389 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:28:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:34,966 INFO L93 Difference]: Finished difference Result 2404 states and 3606 transitions. [2021-12-14 17:28:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:28:34,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-12-14 17:28:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:34,972 INFO L225 Difference]: With dead ends: 2404 [2021-12-14 17:28:34,972 INFO L226 Difference]: Without dead ends: 1493 [2021-12-14 17:28:34,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:28:34,974 INFO L933 BasicCegarLoop]: 1906 mSDtfsCounter, 2010 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:34,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2285 Valid, 3572 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 17:28:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-12-14 17:28:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 954. [2021-12-14 17:28:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 704 states have (on average 1.40625) internal successors, (990), 727 states have internal predecessors, (990), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1394 transitions. [2021-12-14 17:28:35,010 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1394 transitions. Word has length 106 [2021-12-14 17:28:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:35,010 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1394 transitions. [2021-12-14 17:28:35,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:28:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1394 transitions. [2021-12-14 17:28:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:28:35,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:35,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:35,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:28:35,014 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1046832022, now seen corresponding path program 1 times [2021-12-14 17:28:35,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:35,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159598273] [2021-12-14 17:28:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:35,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:28:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:28:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:28:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:28:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 17:28:35,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159598273] [2021-12-14 17:28:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159598273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:35,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:35,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:28:35,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506424483] [2021-12-14 17:28:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:35,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:28:35,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:28:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:28:35,130 INFO L87 Difference]: Start difference. First operand 954 states and 1394 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 17:28:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:35,888 INFO L93 Difference]: Finished difference Result 1897 states and 2793 transitions. [2021-12-14 17:28:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:28:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-12-14 17:28:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:35,893 INFO L225 Difference]: With dead ends: 1897 [2021-12-14 17:28:35,894 INFO L226 Difference]: Without dead ends: 982 [2021-12-14 17:28:35,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:28:35,896 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 360 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:35,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2874 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 17:28:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-12-14 17:28:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 954. [2021-12-14 17:28:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 704 states have (on average 1.4019886363636365) internal successors, (987), 727 states have internal predecessors, (987), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1391 transitions. [2021-12-14 17:28:35,932 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1391 transitions. Word has length 109 [2021-12-14 17:28:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:35,932 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1391 transitions. [2021-12-14 17:28:35,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 17:28:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1391 transitions. [2021-12-14 17:28:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:28:35,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:35,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:28:35,937 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 433348783, now seen corresponding path program 1 times [2021-12-14 17:28:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384452440] [2021-12-14 17:28:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:35,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:28:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:28:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:28:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:28:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 17:28:36,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384452440] [2021-12-14 17:28:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384452440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:28:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181676754] [2021-12-14 17:28:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:36,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:36,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:36,096 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) [2021-12-14 17:28:36,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:28:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:36,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 17:28:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:28:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:28:36,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:28:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 17:28:36,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181676754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:28:36,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:28:36,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 11 [2021-12-14 17:28:36,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203540641] [2021-12-14 17:28:36,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:28:36,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:28:36,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:28:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:28:36,889 INFO L87 Difference]: Start difference. First operand 954 states and 1391 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-12-14 17:28:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:39,891 INFO L93 Difference]: Finished difference Result 3933 states and 6064 transitions. [2021-12-14 17:28:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:28:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 112 [2021-12-14 17:28:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:39,903 INFO L225 Difference]: With dead ends: 3933 [2021-12-14 17:28:39,903 INFO L226 Difference]: Without dead ends: 3018 [2021-12-14 17:28:39,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:28:39,908 INFO L933 BasicCegarLoop]: 1862 mSDtfsCounter, 5498 mSDsluCounter, 4213 mSDsCounter, 0 mSdLazyCounter, 3838 mSolverCounterSat, 1836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5909 SdHoareTripleChecker+Valid, 6075 SdHoareTripleChecker+Invalid, 5674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1836 IncrementalHoareTripleChecker+Valid, 3838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:39,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5909 Valid, 6075 Invalid, 5674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1836 Valid, 3838 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 17:28:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-12-14 17:28:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 961. [2021-12-14 17:28:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 711 states have (on average 1.40084388185654) internal successors, (996), 734 states have internal predecessors, (996), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1400 transitions. [2021-12-14 17:28:39,981 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1400 transitions. Word has length 112 [2021-12-14 17:28:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:39,981 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1400 transitions. [2021-12-14 17:28:39,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-12-14 17:28:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1400 transitions. [2021-12-14 17:28:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-14 17:28:39,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:39,984 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:40,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:28:40,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:40,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash -824916650, now seen corresponding path program 1 times [2021-12-14 17:28:40,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33495964] [2021-12-14 17:28:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:40,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:28:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:28:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:28:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:28:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 17:28:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:28:40,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33495964] [2021-12-14 17:28:40,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33495964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:28:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546390664] [2021-12-14 17:28:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:40,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:40,479 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) [2021-12-14 17:28:40,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:28:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 17:28:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:28:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:28:40,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:28:40,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546390664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:40,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:28:40,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-12-14 17:28:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614835156] [2021-12-14 17:28:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:28:40,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:28:40,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:28:40,992 INFO L87 Difference]: Start difference. First operand 961 states and 1400 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:28:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:41,300 INFO L93 Difference]: Finished difference Result 2661 states and 3999 transitions. [2021-12-14 17:28:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:28:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2021-12-14 17:28:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:41,308 INFO L225 Difference]: With dead ends: 2661 [2021-12-14 17:28:41,308 INFO L226 Difference]: Without dead ends: 1739 [2021-12-14 17:28:41,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:28:41,311 INFO L933 BasicCegarLoop]: 2101 mSDtfsCounter, 1191 mSDsluCounter, 3442 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 5543 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:41,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 5543 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:28:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-12-14 17:28:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 963. [2021-12-14 17:28:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 713 states have (on average 1.399719495091164) internal successors, (998), 736 states have internal predecessors, (998), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1402 transitions. [2021-12-14 17:28:41,360 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1402 transitions. Word has length 121 [2021-12-14 17:28:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:41,360 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1402 transitions. [2021-12-14 17:28:41,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:28:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1402 transitions. [2021-12-14 17:28:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 17:28:41,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:41,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:41,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:28:41,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:28:41,579 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1909926563, now seen corresponding path program 1 times [2021-12-14 17:28:41,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487121612] [2021-12-14 17:28:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:41,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:28:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:28:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:28:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:28:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:28:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:28:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:28:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:28:41,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487121612] [2021-12-14 17:28:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487121612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:41,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:41,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:28:41,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142217241] [2021-12-14 17:28:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:28:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:28:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:28:41,685 INFO L87 Difference]: Start difference. First operand 963 states and 1402 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:28:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:42,775 INFO L93 Difference]: Finished difference Result 2316 states and 3446 transitions. [2021-12-14 17:28:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:28:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-12-14 17:28:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:42,781 INFO L225 Difference]: With dead ends: 2316 [2021-12-14 17:28:42,781 INFO L226 Difference]: Without dead ends: 1392 [2021-12-14 17:28:42,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:28:42,785 INFO L933 BasicCegarLoop]: 1944 mSDtfsCounter, 782 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:42,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 4010 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:28:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-12-14 17:28:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 965. [2021-12-14 17:28:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 715 states have (on average 1.3986013986013985) internal successors, (1000), 738 states have internal predecessors, (1000), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2021-12-14 17:28:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1404 transitions. [2021-12-14 17:28:42,829 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1404 transitions. Word has length 130 [2021-12-14 17:28:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:42,829 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1404 transitions. [2021-12-14 17:28:42,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:28:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1404 transitions. [2021-12-14 17:28:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-14 17:28:42,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:42,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:42,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:28:42,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash 893640959, now seen corresponding path program 1 times [2021-12-14 17:28:42,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787541533] [2021-12-14 17:28:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:42,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:42,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:42,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:28:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:28:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:28:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 17:28:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:28:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:28:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:28:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 17:28:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 17:28:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 17:28:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:28:43,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787541533] [2021-12-14 17:28:43,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787541533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:28:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462277124] [2021-12-14 17:28:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:43,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:43,083 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) [2021-12-14 17:28:43,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:28:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 17:28:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:28:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 17:28:43,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:28:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462277124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:43,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:28:43,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 10 [2021-12-14 17:28:43,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154827006] [2021-12-14 17:28:43,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:43,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:28:43,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:28:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:28:43,725 INFO L87 Difference]: Start difference. First operand 965 states and 1404 transitions. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:28:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:43,931 INFO L93 Difference]: Finished difference Result 1912 states and 2797 transitions. [2021-12-14 17:28:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 17:28:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2021-12-14 17:28:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:43,936 INFO L225 Difference]: With dead ends: 1912 [2021-12-14 17:28:43,936 INFO L226 Difference]: Without dead ends: 973 [2021-12-14 17:28:43,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:28:43,938 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 39 mSDsluCounter, 9505 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 10868 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:43,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 10868 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:28:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-14 17:28:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 967. [2021-12-14 17:28:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 716 states have (on average 1.3980446927374302) internal successors, (1001), 740 states have internal predecessors, (1001), 202 states have call successors, (202), 47 states have call predecessors, (202), 48 states have return successors, (203), 200 states have call predecessors, (203), 202 states have call successors, (203) [2021-12-14 17:28:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1406 transitions. [2021-12-14 17:28:43,981 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1406 transitions. Word has length 138 [2021-12-14 17:28:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:43,981 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1406 transitions. [2021-12-14 17:28:43,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:28:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1406 transitions. [2021-12-14 17:28:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 17:28:43,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:43,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:44,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:28:44,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:44,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -598170049, now seen corresponding path program 1 times [2021-12-14 17:28:44,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:44,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983999518] [2021-12-14 17:28:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:44,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:28:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:28:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:28:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:28:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:28:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:28:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:28:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 17:28:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 17:28:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-14 17:28:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:28:44,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983999518] [2021-12-14 17:28:44,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983999518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:28:44,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:28:44,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:28:44,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019874541] [2021-12-14 17:28:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:28:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:28:44,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:28:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:28:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:28:44,354 INFO L87 Difference]: Start difference. First operand 967 states and 1406 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:28:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:28:46,201 INFO L93 Difference]: Finished difference Result 2852 states and 4298 transitions. [2021-12-14 17:28:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:28:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-12-14 17:28:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:28:46,208 INFO L225 Difference]: With dead ends: 2852 [2021-12-14 17:28:46,209 INFO L226 Difference]: Without dead ends: 1926 [2021-12-14 17:28:46,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:28:46,211 INFO L933 BasicCegarLoop]: 2242 mSDtfsCounter, 1739 mSDsluCounter, 7863 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 10105 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:28:46,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1933 Valid, 10105 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 17:28:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-14 17:28:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 972. [2021-12-14 17:28:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 720 states have (on average 1.3958333333333333) internal successors, (1005), 744 states have internal predecessors, (1005), 202 states have call successors, (202), 47 states have call predecessors, (202), 49 states have return successors, (207), 201 states have call predecessors, (207), 202 states have call successors, (207) [2021-12-14 17:28:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1414 transitions. [2021-12-14 17:28:46,258 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1414 transitions. Word has length 141 [2021-12-14 17:28:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:28:46,259 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1414 transitions. [2021-12-14 17:28:46,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:28:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1414 transitions. [2021-12-14 17:28:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 17:28:46,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:28:46,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:28:46,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:28:46,262 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:28:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:28:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1479322347, now seen corresponding path program 2 times [2021-12-14 17:28:46,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:28:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084103505] [2021-12-14 17:28:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:28:46,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:28:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:28:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:28:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:28:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:28:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:28:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:28:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:28:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:28:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:28:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:28:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 17:28:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 17:28:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 17:28:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 17:28:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:28:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:28:47,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:28:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084103505] [2021-12-14 17:28:47,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084103505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:28:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702093268] [2021-12-14 17:28:47,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:28:47,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:28:47,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:47,499 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) [2021-12-14 17:28:47,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:29:06,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:29:06,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:29:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 179 conjunts are in the unsatisfiable core [2021-12-14 17:29:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:29:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:29:07,091 INFO L354 Elim1Store]: treesize reduction 133, result has 28.1 percent of original size [2021-12-14 17:29:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 60 [2021-12-14 17:29:07,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 17:29:07,465 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 17:29:07,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-14 17:29:07,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:29:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-14 17:29:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:29:08,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:29:08,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 39 [2021-12-14 17:29:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-14 17:29:08,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:29:08,454 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-14 17:29:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 31 [2021-12-14 17:29:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-12-14 17:29:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2021-12-14 17:29:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-12-14 17:29:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-12-14 17:29:08,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2021-12-14 17:29:08,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-14 17:29:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2021-12-14 17:29:08,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 17:29:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-14 17:29:08,972 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-14 17:29:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 57 [2021-12-14 17:29:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-12-14 17:29:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-14 17:29:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-14 17:29:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:08,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 17:29:09,285 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 17:29:09,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:29:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2021-12-14 17:29:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-14 17:29:09,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-14 17:29:09,693 INFO L354 Elim1Store]: treesize reduction 114, result has 19.7 percent of original size [2021-12-14 17:29:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 63 [2021-12-14 17:29:09,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:09,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:29:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 101 [2021-12-14 17:29:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:10,268 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-14 17:29:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 88 [2021-12-14 17:29:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:29:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 29 [2021-12-14 17:29:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 17:29:10,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:29:10,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1254 (Array Int Int)) (v_ArrVal_1253 (Array Int Int)) (v_ArrVal_1252 (Array Int Int))) (let ((.cse0 (mod (let ((.cse1 (+ |c_ULTIMATE.start_slip_open_~sl~12#1.offset| 12))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_slip_open_~tty#1.base| v_ArrVal_1253) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_slip_open_~tty#1.base| v_ArrVal_1252) |c_ULTIMATE.start_slip_open_~sl~12#1.base|) .cse1)) (+ 112 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_slip_open_~tty#1.base| v_ArrVal_1254) |c_ULTIMATE.start_slip_open_~sl~12#1.base|) .cse1)))) 4294967296))) (or (<= .cse0 0) (< 2147483647 .cse0)))) is different from false [2021-12-14 17:29:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702093268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:29:10,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:29:10,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 58 [2021-12-14 17:29:10,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990519961] [2021-12-14 17:29:10,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:29:10,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-14 17:29:10,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-14 17:29:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3131, Unknown=1, NotChecked=112, Total=3422 [2021-12-14 17:29:10,320 INFO L87 Difference]: Start difference. First operand 972 states and 1414 transitions. Second operand has 58 states, 56 states have (on average 3.6607142857142856) internal successors, (205), 48 states have internal predecessors, (205), 17 states have call successors, (30), 7 states have call predecessors, (30), 11 states have return successors, (29), 21 states have call predecessors, (29), 17 states have call successors, (29) [2021-12-14 17:29:19,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []