./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:15:55,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:15:55,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:15:55,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:15:55,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:15:55,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:15:55,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:15:55,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:15:55,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:15:55,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:15:55,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:15:55,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:15:55,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:15:55,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:15:55,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:15:55,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:15:55,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:15:55,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:15:55,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:15:55,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:15:55,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:15:55,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:15:55,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:15:55,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:15:55,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:15:55,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:15:55,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:15:55,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:15:55,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:15:55,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:15:55,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:15:55,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:15:55,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:15:55,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:15:55,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:15:55,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:15:55,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:15:55,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:15:55,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:15:55,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:15:55,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:15:55,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:15:55,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:15:55,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:15:55,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:15:55,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:15:55,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:15:55,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:15:55,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:15:55,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:15:55,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:15:55,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:15:55,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:15:55,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:15:55,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:15:55,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2021-12-14 16:15:55,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:15:55,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:15:55,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:15:55,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:15:55,774 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:15:55,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2021-12-14 16:15:55,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb89d826/b9f6d24b1097486c89a11f16c307cf96/FLAGb2cb846ff [2021-12-14 16:15:56,202 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:15:56,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2021-12-14 16:15:56,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb89d826/b9f6d24b1097486c89a11f16c307cf96/FLAGb2cb846ff [2021-12-14 16:15:56,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb89d826/b9f6d24b1097486c89a11f16c307cf96 [2021-12-14 16:15:56,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:15:56,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:15:56,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:15:56,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:15:56,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:15:56,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1014889b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56, skipping insertion in model container [2021-12-14 16:15:56,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:15:56,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:15:56,457 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/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2021-12-14 16:15:56,502 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/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2021-12-14 16:15:56,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:15:56,554 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:15:56,562 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/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2021-12-14 16:15:56,573 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/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2021-12-14 16:15:56,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:15:56,607 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:15:56,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56 WrapperNode [2021-12-14 16:15:56,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:15:56,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:15:56,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:15:56,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:15:56,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,653 INFO L137 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2021-12-14 16:15:56,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:15:56,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:15:56,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:15:56,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:15:56,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:15:56,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:15:56,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:15:56,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:15:56,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (1/1) ... [2021-12-14 16:15:56,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:15:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:56,728 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 16:15:56,730 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 16:15:56,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:15:56,761 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:15:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:15:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:15:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:15:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:15:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:15:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:15:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:15:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:15:56,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:15:56,763 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:15:56,763 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:15:56,763 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:15:56,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:15:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:15:56,764 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:15:56,764 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:15:56,764 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:15:56,857 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:15:56,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:15:57,290 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:15:57,302 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:15:57,302 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-14 16:15:57,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:15:57 BoogieIcfgContainer [2021-12-14 16:15:57,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:15:57,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:15:57,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:15:57,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:15:57,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:15:56" (1/3) ... [2021-12-14 16:15:57,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b06c4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:15:57, skipping insertion in model container [2021-12-14 16:15:57,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:56" (2/3) ... [2021-12-14 16:15:57,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b06c4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:15:57, skipping insertion in model container [2021-12-14 16:15:57,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:15:57" (3/3) ... [2021-12-14 16:15:57,312 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2021-12-14 16:15:57,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:15:57,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:15:57,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:15:57,355 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 16:15:57,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:15:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-14 16:15:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:15:57,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:57,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:15:57,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash -994911012, now seen corresponding path program 1 times [2021-12-14 16:15:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:57,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177535019] [2021-12-14 16:15:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:57,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:15:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:57,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:57,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177535019] [2021-12-14 16:15:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177535019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:57,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:57,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:57,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555733060] [2021-12-14 16:15:57,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:57,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:57,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:57,643 INFO L87 Difference]: Start difference. First operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:57,930 INFO L93 Difference]: Finished difference Result 576 states and 904 transitions. [2021-12-14 16:15:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:15:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:57,948 INFO L225 Difference]: With dead ends: 576 [2021-12-14 16:15:57,948 INFO L226 Difference]: Without dead ends: 321 [2021-12-14 16:15:57,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 16:15:57,958 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 477 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:57,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 669 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-14 16:15:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2021-12-14 16:15:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 272 states have (on average 1.474264705882353) internal successors, (401), 277 states have internal predecessors, (401), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2021-12-14 16:15:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 463 transitions. [2021-12-14 16:15:58,037 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 463 transitions. Word has length 44 [2021-12-14 16:15:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,038 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 463 transitions. [2021-12-14 16:15:58,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 463 transitions. [2021-12-14 16:15:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:15:58,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:15:58,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:15:58,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash -983625859, now seen corresponding path program 1 times [2021-12-14 16:15:58,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092169027] [2021-12-14 16:15:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:15:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:58,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092169027] [2021-12-14 16:15:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092169027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299663030] [2021-12-14 16:15:58,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,133 INFO L87 Difference]: Start difference. First operand 315 states and 463 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:58,345 INFO L93 Difference]: Finished difference Result 563 states and 803 transitions. [2021-12-14 16:15:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:15:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:58,348 INFO L225 Difference]: With dead ends: 563 [2021-12-14 16:15:58,348 INFO L226 Difference]: Without dead ends: 439 [2021-12-14 16:15:58,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:15:58,349 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 209 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:58,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 860 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-14 16:15:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 382. [2021-12-14 16:15:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 333 states have (on average 1.4564564564564564) internal successors, (485), 338 states have internal predecessors, (485), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2021-12-14 16:15:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 553 transitions. [2021-12-14 16:15:58,373 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 553 transitions. Word has length 45 [2021-12-14 16:15:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,373 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 553 transitions. [2021-12-14 16:15:58,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 553 transitions. [2021-12-14 16:15:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:15:58,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:15:58,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:15:58,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2026983976, now seen corresponding path program 1 times [2021-12-14 16:15:58,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112809520] [2021-12-14 16:15:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:15:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:58,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112809520] [2021-12-14 16:15:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112809520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479828413] [2021-12-14 16:15:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,450 INFO L87 Difference]: Start difference. First operand 382 states and 553 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:58,574 INFO L93 Difference]: Finished difference Result 790 states and 1112 transitions. [2021-12-14 16:15:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:15:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:58,578 INFO L225 Difference]: With dead ends: 790 [2021-12-14 16:15:58,578 INFO L226 Difference]: Without dead ends: 599 [2021-12-14 16:15:58,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:15:58,580 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 486 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:58,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 665 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-14 16:15:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 547. [2021-12-14 16:15:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 479 states have (on average 1.4091858037578289) internal successors, (675), 487 states have internal predecessors, (675), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (52), 38 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-14 16:15:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 771 transitions. [2021-12-14 16:15:58,623 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 771 transitions. Word has length 45 [2021-12-14 16:15:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,623 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 771 transitions. [2021-12-14 16:15:58,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 771 transitions. [2021-12-14 16:15:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:15:58,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:15:58,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:15:58,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -89185588, now seen corresponding path program 1 times [2021-12-14 16:15:58,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680749298] [2021-12-14 16:15:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:15:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:15:58,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680749298] [2021-12-14 16:15:58,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680749298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049279470] [2021-12-14 16:15:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,689 INFO L87 Difference]: Start difference. First operand 547 states and 771 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:58,881 INFO L93 Difference]: Finished difference Result 1131 states and 1556 transitions. [2021-12-14 16:15:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:15:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:58,885 INFO L225 Difference]: With dead ends: 1131 [2021-12-14 16:15:58,885 INFO L226 Difference]: Without dead ends: 775 [2021-12-14 16:15:58,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:15:58,894 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 193 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:58,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-12-14 16:15:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 737. [2021-12-14 16:15:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 645 states have (on average 1.3565891472868217) internal successors, (875), 655 states have internal predecessors, (875), 58 states have call successors, (58), 30 states have call predecessors, (58), 32 states have return successors, (76), 52 states have call predecessors, (76), 54 states have call successors, (76) [2021-12-14 16:15:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1009 transitions. [2021-12-14 16:15:58,920 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1009 transitions. Word has length 62 [2021-12-14 16:15:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,921 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1009 transitions. [2021-12-14 16:15:58,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1009 transitions. [2021-12-14 16:15:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:15:58,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:58,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:15:58,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 613039140, now seen corresponding path program 1 times [2021-12-14 16:15:58,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023952865] [2021-12-14 16:15:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:15:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:15:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:15:58,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023952865] [2021-12-14 16:15:58,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023952865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695668990] [2021-12-14 16:15:58,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,967 INFO L87 Difference]: Start difference. First operand 737 states and 1009 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:59,077 INFO L93 Difference]: Finished difference Result 1390 states and 1862 transitions. [2021-12-14 16:15:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:15:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:59,083 INFO L225 Difference]: With dead ends: 1390 [2021-12-14 16:15:59,083 INFO L226 Difference]: Without dead ends: 936 [2021-12-14 16:15:59,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:15:59,087 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 473 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:59,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 662 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-12-14 16:15:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 881. [2021-12-14 16:15:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 785 states have internal predecessors, (1026), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (90), 60 states have call predecessors, (90), 62 states have call successors, (90) [2021-12-14 16:15:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1182 transitions. [2021-12-14 16:15:59,130 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1182 transitions. Word has length 67 [2021-12-14 16:15:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:59,130 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1182 transitions. [2021-12-14 16:15:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1182 transitions. [2021-12-14 16:15:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:15:59,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:59,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:59,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:15:59,133 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 250622658, now seen corresponding path program 1 times [2021-12-14 16:15:59,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856314128] [2021-12-14 16:15:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:15:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:15:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:15:59,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856314128] [2021-12-14 16:15:59,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856314128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:15:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081765450] [2021-12-14 16:15:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:15:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:59,243 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 16:15:59,245 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 16:15:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:15:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:15:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:15:59,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:15:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081765450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:59,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:15:59,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:15:59,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631325111] [2021-12-14 16:15:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:59,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:15:59,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:15:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:59,500 INFO L87 Difference]: Start difference. First operand 881 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:59,556 INFO L93 Difference]: Finished difference Result 1424 states and 1905 transitions. [2021-12-14 16:15:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:15:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-14 16:15:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:59,562 INFO L225 Difference]: With dead ends: 1424 [2021-12-14 16:15:59,562 INFO L226 Difference]: Without dead ends: 879 [2021-12-14 16:15:59,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:59,568 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 72 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:59,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 766 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:15:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-14 16:15:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 835. [2021-12-14 16:15:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 733 states have (on average 1.311050477489768) internal successors, (961), 745 states have internal predecessors, (961), 62 states have call successors, (62), 34 states have call predecessors, (62), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2021-12-14 16:15:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1107 transitions. [2021-12-14 16:15:59,603 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1107 transitions. Word has length 68 [2021-12-14 16:15:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1107 transitions. [2021-12-14 16:15:59,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1107 transitions. [2021-12-14 16:15:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:15:59,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:59,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:59,632 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 16:15:59,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 16:15:59,815 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372863, now seen corresponding path program 1 times [2021-12-14 16:15:59,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:59,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554692557] [2021-12-14 16:15:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:15:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:15:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:15:59,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:59,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554692557] [2021-12-14 16:15:59,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554692557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:15:59,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570965999] [2021-12-14 16:15:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:15:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:59,885 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 16:15:59,886 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 16:15:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:15:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:00,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:00,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570965999] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:00,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:16:00,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:16:00,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721371874] [2021-12-14 16:16:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:00,170 INFO L87 Difference]: Start difference. First operand 835 states and 1107 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:00,252 INFO L93 Difference]: Finished difference Result 887 states and 1169 transitions. [2021-12-14 16:16:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:16:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:16:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:00,257 INFO L225 Difference]: With dead ends: 887 [2021-12-14 16:16:00,257 INFO L226 Difference]: Without dead ends: 884 [2021-12-14 16:16:00,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:00,258 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 651 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:00,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 459 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-14 16:16:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 834. [2021-12-14 16:16:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 733 states have (on average 1.3083219645293316) internal successors, (959), 744 states have internal predecessors, (959), 61 states have call successors, (61), 34 states have call predecessors, (61), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2021-12-14 16:16:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1104 transitions. [2021-12-14 16:16:00,291 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1104 transitions. Word has length 68 [2021-12-14 16:16:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:00,292 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1104 transitions. [2021-12-14 16:16:00,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1104 transitions. [2021-12-14 16:16:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:16:00,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:00,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:00,313 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 16:16:00,507 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,SelfDestructingSolverStorable6 [2021-12-14 16:16:00,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1961817817, now seen corresponding path program 1 times [2021-12-14 16:16:00,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:00,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914292118] [2021-12-14 16:16:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:00,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:00,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:00,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:00,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914292118] [2021-12-14 16:16:00,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914292118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257252931] [2021-12-14 16:16:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:00,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:00,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:00,560 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 16:16:00,561 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 16:16:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:00,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:01,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257252931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:16:01,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:16:01,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:16:01,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556384011] [2021-12-14 16:16:01,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:16:01,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:16:01,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:16:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:01,008 INFO L87 Difference]: Start difference. First operand 834 states and 1104 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:01,908 INFO L93 Difference]: Finished difference Result 2344 states and 3042 transitions. [2021-12-14 16:16:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:01,915 INFO L225 Difference]: With dead ends: 2344 [2021-12-14 16:16:01,916 INFO L226 Difference]: Without dead ends: 1848 [2021-12-14 16:16:01,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:01,919 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 1090 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:01,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 2629 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:16:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2021-12-14 16:16:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1213. [2021-12-14 16:16:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1073 states have (on average 1.277726001863933) internal successors, (1371), 1092 states have internal predecessors, (1371), 81 states have call successors, (81), 48 states have call predecessors, (81), 57 states have return successors, (118), 73 states have call predecessors, (118), 78 states have call successors, (118) [2021-12-14 16:16:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1570 transitions. [2021-12-14 16:16:01,991 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1570 transitions. Word has length 69 [2021-12-14 16:16:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:01,991 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1570 transitions. [2021-12-14 16:16:01,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1570 transitions. [2021-12-14 16:16:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:01,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:01,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:02,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 16:16:02,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:02,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 484677058, now seen corresponding path program 1 times [2021-12-14 16:16:02,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:02,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437734745] [2021-12-14 16:16:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:02,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:02,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437734745] [2021-12-14 16:16:02,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437734745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364240337] [2021-12-14 16:16:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:02,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:02,257 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 16:16:02,275 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 16:16:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:02,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:02,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364240337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:02,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:02,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:02,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236510501] [2021-12-14 16:16:02,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:02,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:02,437 INFO L87 Difference]: Start difference. First operand 1213 states and 1570 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:02,497 INFO L93 Difference]: Finished difference Result 1904 states and 2445 transitions. [2021-12-14 16:16:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:02,501 INFO L225 Difference]: With dead ends: 1904 [2021-12-14 16:16:02,501 INFO L226 Difference]: Without dead ends: 1135 [2021-12-14 16:16:02,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:02,504 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 330 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:02,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 474 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-12-14 16:16:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1126. [2021-12-14 16:16:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2720883534136547) internal successors, (1267), 1014 states have internal predecessors, (1267), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2021-12-14 16:16:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1454 transitions. [2021-12-14 16:16:02,557 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1454 transitions. Word has length 88 [2021-12-14 16:16:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:02,558 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1454 transitions. [2021-12-14 16:16:02,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1454 transitions. [2021-12-14 16:16:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:02,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:02,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:02,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:02,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1240141234, now seen corresponding path program 1 times [2021-12-14 16:16:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27220477] [2021-12-14 16:16:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:02,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:02,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:02,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27220477] [2021-12-14 16:16:02,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27220477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:02,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:02,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:16:02,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508279029] [2021-12-14 16:16:02,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:02,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:16:02,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:16:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:02,830 INFO L87 Difference]: Start difference. First operand 1126 states and 1454 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:03,223 INFO L93 Difference]: Finished difference Result 1354 states and 1810 transitions. [2021-12-14 16:16:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:03,227 INFO L225 Difference]: With dead ends: 1354 [2021-12-14 16:16:03,227 INFO L226 Difference]: Without dead ends: 1180 [2021-12-14 16:16:03,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:03,229 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 498 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:03,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 766 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-14 16:16:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1126. [2021-12-14 16:16:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2710843373493976) internal successors, (1266), 1014 states have internal predecessors, (1266), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2021-12-14 16:16:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1453 transitions. [2021-12-14 16:16:03,279 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1453 transitions. Word has length 91 [2021-12-14 16:16:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:03,279 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1453 transitions. [2021-12-14 16:16:03,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1453 transitions. [2021-12-14 16:16:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:03,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:03,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:03,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:16:03,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash 999901488, now seen corresponding path program 1 times [2021-12-14 16:16:03,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:03,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174878485] [2021-12-14 16:16:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:03,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:03,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:03,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174878485] [2021-12-14 16:16:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174878485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:03,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:03,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:03,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170465328] [2021-12-14 16:16:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:03,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:03,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:03,347 INFO L87 Difference]: Start difference. First operand 1126 states and 1453 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:04,154 INFO L93 Difference]: Finished difference Result 1580 states and 2164 transitions. [2021-12-14 16:16:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:04,161 INFO L225 Difference]: With dead ends: 1580 [2021-12-14 16:16:04,161 INFO L226 Difference]: Without dead ends: 1408 [2021-12-14 16:16:04,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:04,163 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 795 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:04,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1076 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:16:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-12-14 16:16:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1299. [2021-12-14 16:16:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1149 states have (on average 1.308964316797215) internal successors, (1504), 1168 states have internal predecessors, (1504), 90 states have call successors, (90), 50 states have call predecessors, (90), 58 states have return successors, (126), 81 states have call predecessors, (126), 87 states have call successors, (126) [2021-12-14 16:16:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1720 transitions. [2021-12-14 16:16:04,220 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1720 transitions. Word has length 91 [2021-12-14 16:16:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:04,220 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 1720 transitions. [2021-12-14 16:16:04,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1720 transitions. [2021-12-14 16:16:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:04,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:04,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:04,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:16:04,238 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1054803156, now seen corresponding path program 1 times [2021-12-14 16:16:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073650653] [2021-12-14 16:16:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:04,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:04,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:04,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073650653] [2021-12-14 16:16:04,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073650653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:04,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:04,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:04,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301578120] [2021-12-14 16:16:04,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:04,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:04,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:04,311 INFO L87 Difference]: Start difference. First operand 1299 states and 1720 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:05,447 INFO L93 Difference]: Finished difference Result 1985 states and 2792 transitions. [2021-12-14 16:16:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:05,454 INFO L225 Difference]: With dead ends: 1985 [2021-12-14 16:16:05,455 INFO L226 Difference]: Without dead ends: 1640 [2021-12-14 16:16:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:05,456 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 794 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:05,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1719 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:16:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-12-14 16:16:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1462. [2021-12-14 16:16:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1292 states have (on average 1.3328173374613004) internal successors, (1722), 1312 states have internal predecessors, (1722), 103 states have call successors, (103), 56 states have call predecessors, (103), 65 states have return successors, (141), 95 states have call predecessors, (141), 100 states have call successors, (141) [2021-12-14 16:16:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1966 transitions. [2021-12-14 16:16:05,519 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1966 transitions. Word has length 91 [2021-12-14 16:16:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:05,519 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1966 transitions. [2021-12-14 16:16:05,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1966 transitions. [2021-12-14 16:16:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:05,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:05,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:05,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:16:05,522 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -167580310, now seen corresponding path program 1 times [2021-12-14 16:16:05,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531539878] [2021-12-14 16:16:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:05,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:05,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:05,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531539878] [2021-12-14 16:16:05,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531539878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:05,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:05,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:05,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576713817] [2021-12-14 16:16:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:05,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:05,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:05,601 INFO L87 Difference]: Start difference. First operand 1462 states and 1966 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:06,227 INFO L93 Difference]: Finished difference Result 2148 states and 3044 transitions. [2021-12-14 16:16:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,235 INFO L225 Difference]: With dead ends: 2148 [2021-12-14 16:16:06,235 INFO L226 Difference]: Without dead ends: 1640 [2021-12-14 16:16:06,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:06,238 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 620 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1023 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:16:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-12-14 16:16:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1462. [2021-12-14 16:16:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1292 states have (on average 1.3304953560371517) internal successors, (1719), 1312 states have internal predecessors, (1719), 103 states have call successors, (103), 56 states have call predecessors, (103), 65 states have return successors, (141), 95 states have call predecessors, (141), 100 states have call successors, (141) [2021-12-14 16:16:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1963 transitions. [2021-12-14 16:16:06,310 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1963 transitions. Word has length 91 [2021-12-14 16:16:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,310 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1963 transitions. [2021-12-14 16:16:06,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1963 transitions. [2021-12-14 16:16:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:06,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:16:06,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2078622868, now seen corresponding path program 1 times [2021-12-14 16:16:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891893835] [2021-12-14 16:16:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:06,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891893835] [2021-12-14 16:16:06,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891893835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:06,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:06,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31142036] [2021-12-14 16:16:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:06,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:06,396 INFO L87 Difference]: Start difference. First operand 1462 states and 1963 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:07,443 INFO L93 Difference]: Finished difference Result 2575 states and 3684 transitions. [2021-12-14 16:16:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:07,450 INFO L225 Difference]: With dead ends: 2575 [2021-12-14 16:16:07,450 INFO L226 Difference]: Without dead ends: 2067 [2021-12-14 16:16:07,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:07,452 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 783 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:07,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1702 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:16:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-12-14 16:16:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1794. [2021-12-14 16:16:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1584 states have (on average 1.3648989898989898) internal successors, (2162), 1606 states have internal predecessors, (2162), 129 states have call successors, (129), 68 states have call predecessors, (129), 79 states have return successors, (175), 123 states have call predecessors, (175), 126 states have call successors, (175) [2021-12-14 16:16:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2466 transitions. [2021-12-14 16:16:07,524 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2466 transitions. Word has length 91 [2021-12-14 16:16:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:07,525 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 2466 transitions. [2021-12-14 16:16:07,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2466 transitions. [2021-12-14 16:16:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:07,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:07,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:07,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:16:07,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2001722070, now seen corresponding path program 1 times [2021-12-14 16:16:07,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:07,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745058872] [2021-12-14 16:16:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:07,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:07,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:07,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745058872] [2021-12-14 16:16:07,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745058872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:07,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:07,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979644369] [2021-12-14 16:16:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:07,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:07,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:07,604 INFO L87 Difference]: Start difference. First operand 1794 states and 2466 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:08,776 INFO L93 Difference]: Finished difference Result 3991 states and 5837 transitions. [2021-12-14 16:16:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:08,786 INFO L225 Difference]: With dead ends: 3991 [2021-12-14 16:16:08,786 INFO L226 Difference]: Without dead ends: 3151 [2021-12-14 16:16:08,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:08,790 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 956 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:08,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 1687 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:16:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-12-14 16:16:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2447. [2021-12-14 16:16:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2161 states have (on average 1.4067561314206385) internal successors, (3040), 2187 states have internal predecessors, (3040), 177 states have call successors, (177), 92 states have call predecessors, (177), 107 states have return successors, (245), 175 states have call predecessors, (245), 174 states have call successors, (245) [2021-12-14 16:16:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3462 transitions. [2021-12-14 16:16:08,896 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3462 transitions. Word has length 91 [2021-12-14 16:16:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:08,897 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3462 transitions. [2021-12-14 16:16:08,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3462 transitions. [2021-12-14 16:16:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:08,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:08,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:08,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:16:08,901 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1325894572, now seen corresponding path program 1 times [2021-12-14 16:16:08,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:08,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548171901] [2021-12-14 16:16:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:08,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:08,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548171901] [2021-12-14 16:16:08,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548171901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:08,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:08,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:08,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720353391] [2021-12-14 16:16:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:08,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:08,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:08,969 INFO L87 Difference]: Start difference. First operand 2447 states and 3462 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:10,132 INFO L93 Difference]: Finished difference Result 6430 states and 9571 transitions. [2021-12-14 16:16:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:10,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:10,148 INFO L225 Difference]: With dead ends: 6430 [2021-12-14 16:16:10,148 INFO L226 Difference]: Without dead ends: 4937 [2021-12-14 16:16:10,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:10,153 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 848 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:10,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1326 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:16:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-12-14 16:16:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 3668. [2021-12-14 16:16:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3234 states have (on average 1.4390847247990106) internal successors, (4654), 3268 states have internal predecessors, (4654), 269 states have call successors, (269), 140 states have call predecessors, (269), 163 states have return successors, (399), 275 states have call predecessors, (399), 266 states have call successors, (399) [2021-12-14 16:16:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5322 transitions. [2021-12-14 16:16:10,336 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5322 transitions. Word has length 91 [2021-12-14 16:16:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:10,336 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 5322 transitions. [2021-12-14 16:16:10,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5322 transitions. [2021-12-14 16:16:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:10,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:10,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:10,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:16:10,341 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1060614934, now seen corresponding path program 1 times [2021-12-14 16:16:10,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:10,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149420049] [2021-12-14 16:16:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:10,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149420049] [2021-12-14 16:16:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149420049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:10,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:10,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:10,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274766867] [2021-12-14 16:16:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:10,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:10,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:10,401 INFO L87 Difference]: Start difference. First operand 3668 states and 5322 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:10,985 INFO L93 Difference]: Finished difference Result 7126 states and 10695 transitions. [2021-12-14 16:16:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:11,007 INFO L225 Difference]: With dead ends: 7126 [2021-12-14 16:16:11,007 INFO L226 Difference]: Without dead ends: 4412 [2021-12-14 16:16:11,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:11,013 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 719 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:11,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 857 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:16:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-12-14 16:16:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3668. [2021-12-14 16:16:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3234 states have (on average 1.4338280766852196) internal successors, (4637), 3268 states have internal predecessors, (4637), 269 states have call successors, (269), 140 states have call predecessors, (269), 163 states have return successors, (399), 275 states have call predecessors, (399), 266 states have call successors, (399) [2021-12-14 16:16:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5305 transitions. [2021-12-14 16:16:11,188 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5305 transitions. Word has length 91 [2021-12-14 16:16:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:11,189 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 5305 transitions. [2021-12-14 16:16:11,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5305 transitions. [2021-12-14 16:16:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:11,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:11,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:11,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:16:11,193 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1553241108, now seen corresponding path program 1 times [2021-12-14 16:16:11,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:11,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122894762] [2021-12-14 16:16:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:11,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:11,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122894762] [2021-12-14 16:16:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122894762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:11,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107250669] [2021-12-14 16:16:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:11,252 INFO L87 Difference]: Start difference. First operand 3668 states and 5305 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:12,511 INFO L93 Difference]: Finished difference Result 10679 states and 15997 transitions. [2021-12-14 16:16:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:12,536 INFO L225 Difference]: With dead ends: 10679 [2021-12-14 16:16:12,536 INFO L226 Difference]: Without dead ends: 7965 [2021-12-14 16:16:12,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:12,544 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 789 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:12,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 1698 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:16:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-12-14 16:16:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 6198. [2021-12-14 16:16:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 5476 states have (on average 1.4640248356464574) internal successors, (8017), 5526 states have internal predecessors, (8017), 445 states have call successors, (445), 236 states have call predecessors, (445), 275 states have return successors, (753), 467 states have call predecessors, (753), 442 states have call successors, (753) [2021-12-14 16:16:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 9215 transitions. [2021-12-14 16:16:12,843 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 9215 transitions. Word has length 91 [2021-12-14 16:16:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:12,844 INFO L470 AbstractCegarLoop]: Abstraction has 6198 states and 9215 transitions. [2021-12-14 16:16:12,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 9215 transitions. [2021-12-14 16:16:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:16:12,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:12,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:12,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:16:12,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash -599300950, now seen corresponding path program 1 times [2021-12-14 16:16:12,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:12,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978336212] [2021-12-14 16:16:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:12,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:12,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:12,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978336212] [2021-12-14 16:16:12,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978336212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:12,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:12,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:12,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484891536] [2021-12-14 16:16:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:12,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:12,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:12,909 INFO L87 Difference]: Start difference. First operand 6198 states and 9215 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:14,048 INFO L93 Difference]: Finished difference Result 15966 states and 24188 transitions. [2021-12-14 16:16:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2021-12-14 16:16:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:14,076 INFO L225 Difference]: With dead ends: 15966 [2021-12-14 16:16:14,076 INFO L226 Difference]: Without dead ends: 10723 [2021-12-14 16:16:14,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:16:14,090 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 968 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:14,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 1351 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-12-14 16:16:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 8818. [2021-12-14 16:16:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8818 states, 7772 states have (on average 1.4642305712815233) internal successors, (11380), 7855 states have internal predecessors, (11380), 651 states have call successors, (651), 338 states have call predecessors, (651), 393 states have return successors, (1041), 656 states have call predecessors, (1041), 648 states have call successors, (1041) [2021-12-14 16:16:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8818 states to 8818 states and 13072 transitions. [2021-12-14 16:16:14,541 INFO L78 Accepts]: Start accepts. Automaton has 8818 states and 13072 transitions. Word has length 91 [2021-12-14 16:16:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:14,542 INFO L470 AbstractCegarLoop]: Abstraction has 8818 states and 13072 transitions. [2021-12-14 16:16:14,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8818 states and 13072 transitions. [2021-12-14 16:16:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:14,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:14,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:16:14,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1212598261, now seen corresponding path program 1 times [2021-12-14 16:16:14,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:14,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355672129] [2021-12-14 16:16:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:14,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:14,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:14,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355672129] [2021-12-14 16:16:14,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355672129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:14,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805914875] [2021-12-14 16:16:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:14,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:14,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:14,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:14,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:16:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:14,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:14,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805914875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:14,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:14,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:14,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112411660] [2021-12-14 16:16:14,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:14,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:14,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:14,807 INFO L87 Difference]: Start difference. First operand 8818 states and 13072 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:15,139 INFO L93 Difference]: Finished difference Result 9195 states and 13533 transitions. [2021-12-14 16:16:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:15,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:15,157 INFO L225 Difference]: With dead ends: 9195 [2021-12-14 16:16:15,157 INFO L226 Difference]: Without dead ends: 7877 [2021-12-14 16:16:15,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:15,161 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 61 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:15,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 755 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2021-12-14 16:16:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 7877. [2021-12-14 16:16:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7877 states, 6934 states have (on average 1.4933660224978367) internal successors, (10355), 7001 states have internal predecessors, (10355), 594 states have call successors, (594), 301 states have call predecessors, (594), 348 states have return successors, (949), 606 states have call predecessors, (949), 592 states have call successors, (949) [2021-12-14 16:16:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 11898 transitions. [2021-12-14 16:16:15,547 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 11898 transitions. Word has length 103 [2021-12-14 16:16:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:15,548 INFO L470 AbstractCegarLoop]: Abstraction has 7877 states and 11898 transitions. [2021-12-14 16:16:15,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 11898 transitions. [2021-12-14 16:16:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-14 16:16:15,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:15,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:15,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:15,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:15,782 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1020024290, now seen corresponding path program 1 times [2021-12-14 16:16:15,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:15,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762764686] [2021-12-14 16:16:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:15,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:16:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 16:16:15,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762764686] [2021-12-14 16:16:15,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762764686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238789756] [2021-12-14 16:16:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:15,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:15,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:15,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:15,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:16:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 16:16:16,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:16,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238789756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:16,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:16,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:16,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575551870] [2021-12-14 16:16:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:16,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:16,173 INFO L87 Difference]: Start difference. First operand 7877 states and 11898 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:16,669 INFO L93 Difference]: Finished difference Result 23424 states and 35628 transitions. [2021-12-14 16:16:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2021-12-14 16:16:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:16,725 INFO L225 Difference]: With dead ends: 23424 [2021-12-14 16:16:16,725 INFO L226 Difference]: Without dead ends: 15561 [2021-12-14 16:16:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:16,755 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 226 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 573 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15561 states. [2021-12-14 16:16:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15561 to 15457. [2021-12-14 16:16:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15457 states, 13604 states have (on average 1.4916201117318435) internal successors, (20292), 13736 states have internal predecessors, (20292), 1156 states have call successors, (1156), 601 states have call predecessors, (1156), 696 states have return successors, (1837), 1151 states have call predecessors, (1837), 1154 states have call successors, (1837) [2021-12-14 16:16:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15457 states to 15457 states and 23285 transitions. [2021-12-14 16:16:17,616 INFO L78 Accepts]: Start accepts. Automaton has 15457 states and 23285 transitions. Word has length 147 [2021-12-14 16:16:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:17,616 INFO L470 AbstractCegarLoop]: Abstraction has 15457 states and 23285 transitions. [2021-12-14 16:16:17,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15457 states and 23285 transitions. [2021-12-14 16:16:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-14 16:16:17,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:17,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:17,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:17,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:17,844 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1199828478, now seen corresponding path program 1 times [2021-12-14 16:16:17,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:17,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019569694] [2021-12-14 16:16:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:17,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:16:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 16:16:17,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:17,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019569694] [2021-12-14 16:16:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019569694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:17,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012125751] [2021-12-14 16:16:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:17,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:17,921 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:17,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:16:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 16:16:18,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:18,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012125751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:18,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:18,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:18,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252077959] [2021-12-14 16:16:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:18,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:18,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:18,225 INFO L87 Difference]: Start difference. First operand 15457 states and 23285 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:19,218 INFO L93 Difference]: Finished difference Result 45986 states and 69771 transitions. [2021-12-14 16:16:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:19,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2021-12-14 16:16:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:19,312 INFO L225 Difference]: With dead ends: 45986 [2021-12-14 16:16:19,312 INFO L226 Difference]: Without dead ends: 30543 [2021-12-14 16:16:19,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:19,347 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 214 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 573 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2021-12-14 16:16:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 30339. [2021-12-14 16:16:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30339 states, 26692 states have (on average 1.4897347519856137) internal successors, (39764), 26954 states have internal predecessors, (39764), 2254 states have call successors, (2254), 1201 states have call predecessors, (2254), 1392 states have return successors, (3587), 2215 states have call predecessors, (3587), 2252 states have call successors, (3587) [2021-12-14 16:16:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30339 states to 30339 states and 45605 transitions. [2021-12-14 16:16:20,736 INFO L78 Accepts]: Start accepts. Automaton has 30339 states and 45605 transitions. Word has length 147 [2021-12-14 16:16:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 30339 states and 45605 transitions. [2021-12-14 16:16:20,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 30339 states and 45605 transitions. [2021-12-14 16:16:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-14 16:16:20,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:20,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:20,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:20,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:20,993 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash -298647074, now seen corresponding path program 1 times [2021-12-14 16:16:20,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:20,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154219489] [2021-12-14 16:16:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:20,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:16:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 16:16:21,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:21,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154219489] [2021-12-14 16:16:21,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154219489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175961368] [2021-12-14 16:16:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:21,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:21,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:21,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:21,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:16:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 16:16:21,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:21,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175961368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:21,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:21,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 16:16:21,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429199878] [2021-12-14 16:16:21,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:21,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:21,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:21,389 INFO L87 Difference]: Start difference. First operand 30339 states and 45605 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 16:16:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:23,601 INFO L93 Difference]: Finished difference Result 89635 states and 136094 transitions. [2021-12-14 16:16:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2021-12-14 16:16:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:23,925 INFO L225 Difference]: With dead ends: 89635 [2021-12-14 16:16:23,926 INFO L226 Difference]: Without dead ends: 59311 [2021-12-14 16:16:23,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:23,994 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 231 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:23,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 787 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59311 states. [2021-12-14 16:16:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59311 to 59311. [2021-12-14 16:16:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59311 states, 52157 states have (on average 1.4806066299825527) internal successors, (77224), 52612 states have internal predecessors, (77224), 4369 states have call successors, (4369), 2401 states have call predecessors, (4369), 2784 states have return successors, (7950), 4361 states have call predecessors, (7950), 4367 states have call successors, (7950) [2021-12-14 16:16:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59311 states to 59311 states and 89543 transitions. [2021-12-14 16:16:26,808 INFO L78 Accepts]: Start accepts. Automaton has 59311 states and 89543 transitions. Word has length 147 [2021-12-14 16:16:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:26,808 INFO L470 AbstractCegarLoop]: Abstraction has 59311 states and 89543 transitions. [2021-12-14 16:16:26,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 16:16:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 59311 states and 89543 transitions. [2021-12-14 16:16:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-14 16:16:26,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:26,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:26,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:27,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-14 16:16:27,137 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1306108089, now seen corresponding path program 1 times [2021-12-14 16:16:27,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:27,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030623196] [2021-12-14 16:16:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:27,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-14 16:16:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-14 16:16:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 16:16:27,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:27,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030623196] [2021-12-14 16:16:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030623196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:27,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644827695] [2021-12-14 16:16:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:27,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:27,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:27,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 16:16:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 16:16:27,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:27,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644827695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:27,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:27,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:27,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041043596] [2021-12-14 16:16:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:27,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:27,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:27,747 INFO L87 Difference]: Start difference. First operand 59311 states and 89543 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 16:16:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:31,930 INFO L93 Difference]: Finished difference Result 175889 states and 267770 transitions. [2021-12-14 16:16:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2021-12-14 16:16:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:32,332 INFO L225 Difference]: With dead ends: 175889 [2021-12-14 16:16:32,333 INFO L226 Difference]: Without dead ends: 116599 [2021-12-14 16:16:32,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:32,678 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 166 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:32,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 573 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116599 states. [2021-12-14 16:16:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116599 to 115795. [2021-12-14 16:16:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115795 states, 101897 states have (on average 1.4801613393917388) internal successors, (150824), 102804 states have internal predecessors, (150824), 8329 states have call successors, (8329), 4801 states have call predecessors, (8329), 5568 states have return successors, (15230), 8253 states have call predecessors, (15230), 8327 states have call successors, (15230) [2021-12-14 16:16:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115795 states to 115795 states and 174383 transitions. [2021-12-14 16:16:38,045 INFO L78 Accepts]: Start accepts. Automaton has 115795 states and 174383 transitions. Word has length 191 [2021-12-14 16:16:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:38,045 INFO L470 AbstractCegarLoop]: Abstraction has 115795 states and 174383 transitions. [2021-12-14 16:16:38,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 16:16:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 115795 states and 174383 transitions. [2021-12-14 16:16:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-14 16:16:38,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:38,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:38,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 16:16:38,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 399277447, now seen corresponding path program 1 times [2021-12-14 16:16:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732133932] [2021-12-14 16:16:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 16:16:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:16:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:16:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-14 16:16:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 16:16:38,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732133932] [2021-12-14 16:16:38,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732133932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662200233] [2021-12-14 16:16:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:38,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:38,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:38,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 16:16:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 16:16:38,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:38,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662200233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:38,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:38,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:38,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51698087] [2021-12-14 16:16:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:38,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:38,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:38,892 INFO L87 Difference]: Start difference. First operand 115795 states and 174383 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)