./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_3.cil+token_ring.02.cil-1.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 4ebb73aa3b2fe06c298821e537034d0c16e316e18b31a7db411eb85fc916df11 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:14:36,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:14:36,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:14:36,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:14:36,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:14:36,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:14:36,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:14:36,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:14:36,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:14:36,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:14:36,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:14:36,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:14:36,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:14:36,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:14:36,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:14:36,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:14:36,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:14:36,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:14:36,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:14:36,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:14:36,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:14:36,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:14:36,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:14:36,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:14:36,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:14:36,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:14:36,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:14:36,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:14:36,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:14:36,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:14:36,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:14:36,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:14:36,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:14:36,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:14:36,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:14:36,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:14:36,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:14:36,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:14:36,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:14:36,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:14:36,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:14:36,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:14:36,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:14:36,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:14:36,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:14:36,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:14:36,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:14:36,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:14:36,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:14:36,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:14:36,620 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:14:36,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:14:36,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:14:36,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:14:36,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:14:36,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:14:36,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:14:36,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:14:36,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:14:36,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:14:36,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:14:36,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:14:36,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:14:36,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:14:36,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:14:36,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ebb73aa3b2fe06c298821e537034d0c16e316e18b31a7db411eb85fc916df11 [2021-12-22 13:14:36,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:14:36,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:14:36,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:14:36,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:14:36,832 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:14:36,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c [2021-12-22 13:14:36,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403a1e890/27a8253d7dc6461a8d1141cf3da26603/FLAG20c7abff9 [2021-12-22 13:14:37,259 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:14:37,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c [2021-12-22 13:14:37,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403a1e890/27a8253d7dc6461a8d1141cf3da26603/FLAG20c7abff9 [2021-12-22 13:14:37,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403a1e890/27a8253d7dc6461a8d1141cf3da26603 [2021-12-22 13:14:37,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:14:37,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:14:37,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:14:37,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:14:37,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:14:37,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dabc2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37, skipping insertion in model container [2021-12-22 13:14:37,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:14:37,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:14:37,497 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_3.cil+token_ring.02.cil-1.c[911,924] [2021-12-22 13:14:37,568 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_3.cil+token_ring.02.cil-1.c[8416,8429] [2021-12-22 13:14:37,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:14:37,615 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:14:37,626 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_3.cil+token_ring.02.cil-1.c[911,924] [2021-12-22 13:14:37,650 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_3.cil+token_ring.02.cil-1.c[8416,8429] [2021-12-22 13:14:37,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:14:37,690 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:14:37,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37 WrapperNode [2021-12-22 13:14:37,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:14:37,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:14:37,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:14:37,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:14:37,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,759 INFO L137 Inliner]: procedures = 59, calls = 67, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 498 [2021-12-22 13:14:37,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:14:37,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:14:37,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:14:37,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:14:37,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:14:37,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:14:37,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:14:37,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:14:37,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (1/1) ... [2021-12-22 13:14:37,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:14:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:37,840 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) [2021-12-22 13:14:37,842 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 [2021-12-22 13:14:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:14:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:14:37,869 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:14:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:14:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:14:37,870 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:14:37,870 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:14:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:14:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:14:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:14:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:14:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:14:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:14:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:14:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:14:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:14:37,872 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:14:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:14:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:14:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:14:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:14:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:14:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:14:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:14:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:14:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:14:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:14:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:14:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:14:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:14:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:14:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:14:37,983 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:14:37,990 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:14:38,368 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-22 13:14:38,369 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-22 13:14:38,430 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:14:38,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:14:38,442 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-22 13:14:38,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:38 BoogieIcfgContainer [2021-12-22 13:14:38,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:14:38,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:14:38,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:14:38,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:14:38,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:14:37" (1/3) ... [2021-12-22 13:14:38,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b403dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:38, skipping insertion in model container [2021-12-22 13:14:38,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:37" (2/3) ... [2021-12-22 13:14:38,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b403dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:38, skipping insertion in model container [2021-12-22 13:14:38,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:38" (3/3) ... [2021-12-22 13:14:38,452 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.02.cil-1.c [2021-12-22 13:14:38,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:14:38,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:14:38,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:14:38,512 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 [2021-12-22 13:14:38,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:14:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 200 states have (on average 1.555) internal successors, (311), 206 states have internal predecessors, (311), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 13:14:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:38,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:38,546 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] [2021-12-22 13:14:38,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1783891232, now seen corresponding path program 1 times [2021-12-22 13:14:38,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:38,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989142305] [2021-12-22 13:14:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:38,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:38,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:38,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989142305] [2021-12-22 13:14:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989142305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:38,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:38,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841326512] [2021-12-22 13:14:38,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:38,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:38,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:38,926 INFO L87 Difference]: Start difference. First operand has 249 states, 200 states have (on average 1.555) internal successors, (311), 206 states have internal predecessors, (311), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:39,614 INFO L93 Difference]: Finished difference Result 631 states and 957 transitions. [2021-12-22 13:14:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:14:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:39,626 INFO L225 Difference]: With dead ends: 631 [2021-12-22 13:14:39,626 INFO L226 Difference]: Without dead ends: 390 [2021-12-22 13:14:39,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:14:39,632 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 515 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:39,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 1382 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-22 13:14:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 351. [2021-12-22 13:14:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 282 states have (on average 1.446808510638298) internal successors, (408), 288 states have internal predecessors, (408), 45 states have call successors, (45), 21 states have call predecessors, (45), 22 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2021-12-22 13:14:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 501 transitions. [2021-12-22 13:14:39,684 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 501 transitions. Word has length 65 [2021-12-22 13:14:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:39,685 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 501 transitions. [2021-12-22 13:14:39,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 501 transitions. [2021-12-22 13:14:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:39,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:39,688 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] [2021-12-22 13:14:39,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:14:39,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:39,689 INFO L85 PathProgramCache]: Analyzing trace with hash -832187424, now seen corresponding path program 1 times [2021-12-22 13:14:39,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278163463] [2021-12-22 13:14:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:39,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:39,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278163463] [2021-12-22 13:14:39,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278163463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:39,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:39,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:14:39,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372392160] [2021-12-22 13:14:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:39,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:14:39,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:14:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:39,808 INFO L87 Difference]: Start difference. First operand 351 states and 501 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 13:14:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:41,259 INFO L93 Difference]: Finished difference Result 1384 states and 1961 transitions. [2021-12-22 13:14:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:14:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-22 13:14:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:41,266 INFO L225 Difference]: With dead ends: 1384 [2021-12-22 13:14:41,267 INFO L226 Difference]: Without dead ends: 1163 [2021-12-22 13:14:41,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:14:41,269 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 2085 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:41,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2105 Valid, 1947 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-12-22 13:14:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1024. [2021-12-22 13:14:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 825 states have (on average 1.3903030303030304) internal successors, (1147), 839 states have internal predecessors, (1147), 116 states have call successors, (116), 74 states have call predecessors, (116), 81 states have return successors, (128), 112 states have call predecessors, (128), 114 states have call successors, (128) [2021-12-22 13:14:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1391 transitions. [2021-12-22 13:14:41,335 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1391 transitions. Word has length 65 [2021-12-22 13:14:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:41,336 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1391 transitions. [2021-12-22 13:14:41,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 13:14:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1391 transitions. [2021-12-22 13:14:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:14:41,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:41,338 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] [2021-12-22 13:14:41,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:14:41,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1785966606, now seen corresponding path program 1 times [2021-12-22 13:14:41,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:41,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610771216] [2021-12-22 13:14:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:41,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:14:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:41,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610771216] [2021-12-22 13:14:41,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610771216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:41,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:41,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:41,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371620643] [2021-12-22 13:14:41,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:41,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:41,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:41,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:41,464 INFO L87 Difference]: Start difference. First operand 1024 states and 1391 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:14:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:41,953 INFO L93 Difference]: Finished difference Result 2050 states and 2785 transitions. [2021-12-22 13:14:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:14:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:14:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:41,958 INFO L225 Difference]: With dead ends: 2050 [2021-12-22 13:14:41,958 INFO L226 Difference]: Without dead ends: 1162 [2021-12-22 13:14:41,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:41,961 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 266 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:41,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1663 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:14:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-12-22 13:14:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1054. [2021-12-22 13:14:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 849 states have (on average 1.375736160188457) internal successors, (1168), 863 states have internal predecessors, (1168), 116 states have call successors, (116), 74 states have call predecessors, (116), 87 states have return successors, (134), 118 states have call predecessors, (134), 114 states have call successors, (134) [2021-12-22 13:14:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1418 transitions. [2021-12-22 13:14:42,001 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1418 transitions. Word has length 66 [2021-12-22 13:14:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:42,001 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1418 transitions. [2021-12-22 13:14:42,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:14:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1418 transitions. [2021-12-22 13:14:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:14:42,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:42,003 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] [2021-12-22 13:14:42,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:14:42,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1479641392, now seen corresponding path program 1 times [2021-12-22 13:14:42,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:42,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890382339] [2021-12-22 13:14:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:42,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:14:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:42,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890382339] [2021-12-22 13:14:42,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890382339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:42,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:42,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:14:42,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448894320] [2021-12-22 13:14:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:14:42,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:14:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:42,092 INFO L87 Difference]: Start difference. First operand 1054 states and 1418 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:14:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:43,339 INFO L93 Difference]: Finished difference Result 3392 states and 4605 transitions. [2021-12-22 13:14:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:14:43,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-22 13:14:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:43,344 INFO L225 Difference]: With dead ends: 3392 [2021-12-22 13:14:43,345 INFO L226 Difference]: Without dead ends: 1297 [2021-12-22 13:14:43,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:14:43,350 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 2436 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2456 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:43,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2456 Valid, 1727 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:14:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-12-22 13:14:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1142. [2021-12-22 13:14:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 902 states have (on average 1.335920177383592) internal successors, (1205), 916 states have internal predecessors, (1205), 136 states have call successors, (136), 88 states have call predecessors, (136), 102 states have return successors, (155), 139 states have call predecessors, (155), 134 states have call successors, (155) [2021-12-22 13:14:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1496 transitions. [2021-12-22 13:14:43,395 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1496 transitions. Word has length 66 [2021-12-22 13:14:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:43,395 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1496 transitions. [2021-12-22 13:14:43,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:14:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1496 transitions. [2021-12-22 13:14:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:43,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:43,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:43,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:14:43,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash 864637062, now seen corresponding path program 1 times [2021-12-22 13:14:43,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:43,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317335061] [2021-12-22 13:14:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:43,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:43,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317335061] [2021-12-22 13:14:43,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317335061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:43,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:43,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:43,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18226209] [2021-12-22 13:14:43,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:43,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:43,453 INFO L87 Difference]: Start difference. First operand 1142 states and 1496 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:44,005 INFO L93 Difference]: Finished difference Result 1438 states and 1943 transitions. [2021-12-22 13:14:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:14:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:44,010 INFO L225 Difference]: With dead ends: 1438 [2021-12-22 13:14:44,010 INFO L226 Difference]: Without dead ends: 1321 [2021-12-22 13:14:44,011 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 [2021-12-22 13:14:44,011 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 648 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:44,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 915 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-12-22 13:14:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1258. [2021-12-22 13:14:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1000 states have (on average 1.351) internal successors, (1351), 1015 states have internal predecessors, (1351), 147 states have call successors, (147), 94 states have call predecessors, (147), 109 states have return successors, (169), 150 states have call predecessors, (169), 145 states have call successors, (169) [2021-12-22 13:14:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1667 transitions. [2021-12-22 13:14:44,053 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1667 transitions. Word has length 68 [2021-12-22 13:14:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1667 transitions. [2021-12-22 13:14:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1667 transitions. [2021-12-22 13:14:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:44,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:44,055 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] [2021-12-22 13:14:44,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:14:44,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2043544824, now seen corresponding path program 1 times [2021-12-22 13:14:44,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589927360] [2021-12-22 13:14:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:44,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:44,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589927360] [2021-12-22 13:14:44,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589927360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:44,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:44,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:44,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599276007] [2021-12-22 13:14:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:44,123 INFO L87 Difference]: Start difference. First operand 1258 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:44,824 INFO L93 Difference]: Finished difference Result 1701 states and 2327 transitions. [2021-12-22 13:14:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:44,830 INFO L225 Difference]: With dead ends: 1701 [2021-12-22 13:14:44,830 INFO L226 Difference]: Without dead ends: 1468 [2021-12-22 13:14:44,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:44,832 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 642 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:44,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 1307 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:14:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-12-22 13:14:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1367. [2021-12-22 13:14:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1091 states have (on average 1.3593033913840513) internal successors, (1483), 1107 states have internal predecessors, (1483), 158 states have call successors, (158), 100 states have call predecessors, (158), 116 states have return successors, (182), 162 states have call predecessors, (182), 156 states have call successors, (182) [2021-12-22 13:14:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1823 transitions. [2021-12-22 13:14:44,880 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1823 transitions. Word has length 68 [2021-12-22 13:14:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 1823 transitions. [2021-12-22 13:14:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1823 transitions. [2021-12-22 13:14:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:44,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:44,881 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] [2021-12-22 13:14:44,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:14:44,882 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:44,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1167525818, now seen corresponding path program 1 times [2021-12-22 13:14:44,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:44,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507457699] [2021-12-22 13:14:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:44,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:44,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507457699] [2021-12-22 13:14:44,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507457699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:44,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:44,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:44,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072612383] [2021-12-22 13:14:44,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:44,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:44,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:44,964 INFO L87 Difference]: Start difference. First operand 1367 states and 1823 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:45,382 INFO L93 Difference]: Finished difference Result 1808 states and 2485 transitions. [2021-12-22 13:14:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:45,387 INFO L225 Difference]: With dead ends: 1808 [2021-12-22 13:14:45,388 INFO L226 Difference]: Without dead ends: 1466 [2021-12-22 13:14:45,389 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 [2021-12-22 13:14:45,389 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 644 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:45,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 717 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-12-22 13:14:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1367. [2021-12-22 13:14:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1091 states have (on average 1.3565536205316224) internal successors, (1480), 1107 states have internal predecessors, (1480), 158 states have call successors, (158), 100 states have call predecessors, (158), 116 states have return successors, (182), 162 states have call predecessors, (182), 156 states have call successors, (182) [2021-12-22 13:14:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1820 transitions. [2021-12-22 13:14:45,439 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1820 transitions. Word has length 68 [2021-12-22 13:14:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 1820 transitions. [2021-12-22 13:14:45,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1820 transitions. [2021-12-22 13:14:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:45,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:45,441 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] [2021-12-22 13:14:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:14:45,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash 370814212, now seen corresponding path program 1 times [2021-12-22 13:14:45,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832689225] [2021-12-22 13:14:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:45,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:45,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:45,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832689225] [2021-12-22 13:14:45,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832689225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:45,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:45,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:45,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517228647] [2021-12-22 13:14:45,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:45,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:45,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:45,496 INFO L87 Difference]: Start difference. First operand 1367 states and 1820 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:46,224 INFO L93 Difference]: Finished difference Result 2132 states and 2941 transitions. [2021-12-22 13:14:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:14:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:46,231 INFO L225 Difference]: With dead ends: 2132 [2021-12-22 13:14:46,231 INFO L226 Difference]: Without dead ends: 1790 [2021-12-22 13:14:46,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:14:46,233 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 685 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:46,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 1271 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-22 13:14:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1576. [2021-12-22 13:14:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1266 states have (on average 1.3688783570300158) internal successors, (1733), 1284 states have internal predecessors, (1733), 178 states have call successors, (178), 112 states have call predecessors, (178), 130 states have return successors, (210), 184 states have call predecessors, (210), 176 states have call successors, (210) [2021-12-22 13:14:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2121 transitions. [2021-12-22 13:14:46,296 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2121 transitions. Word has length 68 [2021-12-22 13:14:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2121 transitions. [2021-12-22 13:14:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2121 transitions. [2021-12-22 13:14:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:46,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:46,299 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] [2021-12-22 13:14:46,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:14:46,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1657771898, now seen corresponding path program 1 times [2021-12-22 13:14:46,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321909495] [2021-12-22 13:14:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:46,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:46,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321909495] [2021-12-22 13:14:46,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321909495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:46,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:46,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:46,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998921928] [2021-12-22 13:14:46,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:46,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:46,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:46,360 INFO L87 Difference]: Start difference. First operand 1576 states and 2121 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:47,095 INFO L93 Difference]: Finished difference Result 2835 states and 3948 transitions. [2021-12-22 13:14:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:14:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:47,104 INFO L225 Difference]: With dead ends: 2835 [2021-12-22 13:14:47,104 INFO L226 Difference]: Without dead ends: 2284 [2021-12-22 13:14:47,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:14:47,108 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 631 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:47,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1283 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:14:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-12-22 13:14:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1997. [2021-12-22 13:14:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1621 states have (on average 1.3861813695249845) internal successors, (2247), 1643 states have internal predecessors, (2247), 216 states have call successors, (216), 136 states have call predecessors, (216), 158 states have return successors, (270), 226 states have call predecessors, (270), 214 states have call successors, (270) [2021-12-22 13:14:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2733 transitions. [2021-12-22 13:14:47,186 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2733 transitions. Word has length 68 [2021-12-22 13:14:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:47,186 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 2733 transitions. [2021-12-22 13:14:47,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2733 transitions. [2021-12-22 13:14:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:47,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:47,187 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] [2021-12-22 13:14:47,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:14:47,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2138852156, now seen corresponding path program 1 times [2021-12-22 13:14:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243436908] [2021-12-22 13:14:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:47,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:47,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243436908] [2021-12-22 13:14:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243436908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:47,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:47,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:47,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217777794] [2021-12-22 13:14:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:47,264 INFO L87 Difference]: Start difference. First operand 1997 states and 2733 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:47,824 INFO L93 Difference]: Finished difference Result 3506 states and 4960 transitions. [2021-12-22 13:14:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:14:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:47,834 INFO L225 Difference]: With dead ends: 3506 [2021-12-22 13:14:47,834 INFO L226 Difference]: Without dead ends: 2535 [2021-12-22 13:14:47,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:14:47,838 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 373 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:47,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1231 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:14:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-12-22 13:14:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2024. [2021-12-22 13:14:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1648 states have (on average 1.3798543689320388) internal successors, (2274), 1670 states have internal predecessors, (2274), 216 states have call successors, (216), 136 states have call predecessors, (216), 158 states have return successors, (270), 226 states have call predecessors, (270), 214 states have call successors, (270) [2021-12-22 13:14:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2760 transitions. [2021-12-22 13:14:47,943 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2760 transitions. Word has length 68 [2021-12-22 13:14:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:47,943 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 2760 transitions. [2021-12-22 13:14:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2760 transitions. [2021-12-22 13:14:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:14:47,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:47,945 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] [2021-12-22 13:14:47,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:14:47,945 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1715205434, now seen corresponding path program 1 times [2021-12-22 13:14:47,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222303830] [2021-12-22 13:14:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:47,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:48,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222303830] [2021-12-22 13:14:48,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222303830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:48,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:48,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:48,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119860282] [2021-12-22 13:14:48,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:48,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:48,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:48,035 INFO L87 Difference]: Start difference. First operand 2024 states and 2760 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:49,109 INFO L93 Difference]: Finished difference Result 5491 states and 7964 transitions. [2021-12-22 13:14:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:14:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-22 13:14:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:49,127 INFO L225 Difference]: With dead ends: 5491 [2021-12-22 13:14:49,127 INFO L226 Difference]: Without dead ends: 4493 [2021-12-22 13:14:49,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:14:49,133 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1409 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:49,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 1166 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2021-12-22 13:14:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 3942. [2021-12-22 13:14:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3244 states have (on average 1.3982737361282367) internal successors, (4536), 3297 states have internal predecessors, (4536), 408 states have call successors, (408), 250 states have call predecessors, (408), 288 states have return successors, (579), 403 states have call predecessors, (579), 406 states have call successors, (579) [2021-12-22 13:14:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5523 transitions. [2021-12-22 13:14:49,339 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5523 transitions. Word has length 68 [2021-12-22 13:14:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:49,339 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 5523 transitions. [2021-12-22 13:14:49,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5523 transitions. [2021-12-22 13:14:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:49,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:49,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:49,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:14:49,344 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:49,345 INFO L85 PathProgramCache]: Analyzing trace with hash 163766987, now seen corresponding path program 1 times [2021-12-22 13:14:49,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:49,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953643961] [2021-12-22 13:14:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:49,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:14:49,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953643961] [2021-12-22 13:14:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953643961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:49,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:49,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206273434] [2021-12-22 13:14:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:49,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:49,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:49,439 INFO L87 Difference]: Start difference. First operand 3942 states and 5523 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:14:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:49,988 INFO L93 Difference]: Finished difference Result 5119 states and 7074 transitions. [2021-12-22 13:14:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-22 13:14:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:50,005 INFO L225 Difference]: With dead ends: 5119 [2021-12-22 13:14:50,005 INFO L226 Difference]: Without dead ends: 4113 [2021-12-22 13:14:50,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:14:50,010 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 259 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:50,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1593 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-12-22 13:14:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3982. [2021-12-22 13:14:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3982 states, 3276 states have (on average 1.3934676434676434) internal successors, (4565), 3329 states have internal predecessors, (4565), 408 states have call successors, (408), 250 states have call predecessors, (408), 296 states have return successors, (587), 411 states have call predecessors, (587), 406 states have call successors, (587) [2021-12-22 13:14:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 5560 transitions. [2021-12-22 13:14:50,229 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 5560 transitions. Word has length 91 [2021-12-22 13:14:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 3982 states and 5560 transitions. [2021-12-22 13:14:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:14:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 5560 transitions. [2021-12-22 13:14:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:50,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:50,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:50,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:14:50,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash 607667661, now seen corresponding path program 1 times [2021-12-22 13:14:50,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73213457] [2021-12-22 13:14:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:50,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:14:50,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73213457] [2021-12-22 13:14:50,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73213457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:50,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:50,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:50,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882296393] [2021-12-22 13:14:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:50,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:50,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:50,310 INFO L87 Difference]: Start difference. First operand 3982 states and 5560 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:51,077 INFO L93 Difference]: Finished difference Result 6020 states and 8165 transitions. [2021-12-22 13:14:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:14:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-22 13:14:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:51,103 INFO L225 Difference]: With dead ends: 6020 [2021-12-22 13:14:51,103 INFO L226 Difference]: Without dead ends: 4975 [2021-12-22 13:14:51,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:14:51,110 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 674 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:51,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 1280 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-12-22 13:14:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4659. [2021-12-22 13:14:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 3805 states have (on average 1.3742444152431013) internal successors, (5229), 3871 states have internal predecessors, (5229), 484 states have call successors, (484), 303 states have call predecessors, (484), 368 states have return successors, (700), 494 states have call predecessors, (700), 482 states have call successors, (700) [2021-12-22 13:14:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6413 transitions. [2021-12-22 13:14:51,334 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6413 transitions. Word has length 91 [2021-12-22 13:14:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:51,334 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 6413 transitions. [2021-12-22 13:14:51,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6413 transitions. [2021-12-22 13:14:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:51,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:51,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:51,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:14:51,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1748137589, now seen corresponding path program 1 times [2021-12-22 13:14:51,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994571714] [2021-12-22 13:14:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:51,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:14:51,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994571714] [2021-12-22 13:14:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994571714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:51,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:51,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:51,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147813521] [2021-12-22 13:14:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:51,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:51,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:51,398 INFO L87 Difference]: Start difference. First operand 4659 states and 6413 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 13:14:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:51,974 INFO L93 Difference]: Finished difference Result 8318 states and 11195 transitions. [2021-12-22 13:14:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-22 13:14:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:51,998 INFO L225 Difference]: With dead ends: 8318 [2021-12-22 13:14:51,999 INFO L226 Difference]: Without dead ends: 6598 [2021-12-22 13:14:52,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:14:52,004 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 742 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:52,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 849 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-12-22 13:14:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 6378. [2021-12-22 13:14:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 5143 states have (on average 1.3400738868364768) internal successors, (6892), 5245 states have internal predecessors, (6892), 677 states have call successors, (677), 437 states have call predecessors, (677), 556 states have return successors, (1040), 707 states have call predecessors, (1040), 675 states have call successors, (1040) [2021-12-22 13:14:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 8609 transitions. [2021-12-22 13:14:52,282 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 8609 transitions. Word has length 91 [2021-12-22 13:14:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:52,283 INFO L470 AbstractCegarLoop]: Abstraction has 6378 states and 8609 transitions. [2021-12-22 13:14:52,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 13:14:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 8609 transitions. [2021-12-22 13:14:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:52,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:52,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:14:52,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:52,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1488991629, now seen corresponding path program 1 times [2021-12-22 13:14:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369163348] [2021-12-22 13:14:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:52,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:14:52,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369163348] [2021-12-22 13:14:52,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369163348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:52,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:52,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132266570] [2021-12-22 13:14:52,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:52,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:52,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:52,333 INFO L87 Difference]: Start difference. First operand 6378 states and 8609 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:52,710 INFO L93 Difference]: Finished difference Result 8216 states and 10912 transitions. [2021-12-22 13:14:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:14:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-22 13:14:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:52,723 INFO L225 Difference]: With dead ends: 8216 [2021-12-22 13:14:52,724 INFO L226 Difference]: Without dead ends: 4777 [2021-12-22 13:14:52,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:52,732 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 491 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:52,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 712 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:14:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-12-22 13:14:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4659. [2021-12-22 13:14:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 3805 states have (on average 1.3629434954007884) internal successors, (5186), 3871 states have internal predecessors, (5186), 484 states have call successors, (484), 303 states have call predecessors, (484), 368 states have return successors, (700), 494 states have call predecessors, (700), 482 states have call successors, (700) [2021-12-22 13:14:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6370 transitions. [2021-12-22 13:14:52,998 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6370 transitions. Word has length 91 [2021-12-22 13:14:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:52,999 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 6370 transitions. [2021-12-22 13:14:52,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:14:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6370 transitions. [2021-12-22 13:14:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 13:14:53,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:53,003 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:14:53,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:14:53,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1449992458, now seen corresponding path program 1 times [2021-12-22 13:14:53,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092638256] [2021-12-22 13:14:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:53,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:14:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:14:53,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092638256] [2021-12-22 13:14:53,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092638256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:53,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:53,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:53,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850680285] [2021-12-22 13:14:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:53,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:53,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:53,086 INFO L87 Difference]: Start difference. First operand 4659 states and 6370 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:14:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:54,055 INFO L93 Difference]: Finished difference Result 7485 states and 9972 transitions. [2021-12-22 13:14:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 13:14:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-22 13:14:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:54,069 INFO L225 Difference]: With dead ends: 7485 [2021-12-22 13:14:54,069 INFO L226 Difference]: Without dead ends: 5458 [2021-12-22 13:14:54,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-22 13:14:54,074 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 1758 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1791 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:54,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1791 Valid, 1132 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:14:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2021-12-22 13:14:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5281. [2021-12-22 13:14:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 4271 states have (on average 1.338562397564973) internal successors, (5717), 4345 states have internal predecessors, (5717), 562 states have call successors, (562), 351 states have call predecessors, (562), 446 states have return successors, (833), 594 states have call predecessors, (833), 560 states have call successors, (833) [2021-12-22 13:14:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7112 transitions. [2021-12-22 13:14:54,278 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7112 transitions. Word has length 92 [2021-12-22 13:14:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:54,278 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 7112 transitions. [2021-12-22 13:14:54,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:14:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7112 transitions. [2021-12-22 13:14:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 13:14:54,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:54,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:54,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:14:54,284 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1292747492, now seen corresponding path program 1 times [2021-12-22 13:14:54,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:54,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344531891] [2021-12-22 13:14:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:54,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:14:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:14:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:14:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 13:14:54,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344531891] [2021-12-22 13:14:54,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344531891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229778128] [2021-12-22 13:14:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:54,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:54,363 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) [2021-12-22 13:14:54,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:14:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:14:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:14:54,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:14:54,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229778128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:54,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:14:54,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:14:54,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967190211] [2021-12-22 13:14:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:54,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:14:54,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:14:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:54,602 INFO L87 Difference]: Start difference. First operand 5281 states and 7112 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:14:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:54,878 INFO L93 Difference]: Finished difference Result 10972 states and 15368 transitions. [2021-12-22 13:14:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:14:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-22 13:14:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:54,894 INFO L225 Difference]: With dead ends: 10972 [2021-12-22 13:14:54,895 INFO L226 Difference]: Without dead ends: 5811 [2021-12-22 13:14:54,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:54,908 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 153 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 805 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 [2021-12-22 13:14:54,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 805 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:14:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-12-22 13:14:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 5811. [2021-12-22 13:14:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 4718 states have (on average 1.3452734209410768) internal successors, (6347), 4796 states have internal predecessors, (6347), 611 states have call successors, (611), 381 states have call predecessors, (611), 480 states have return successors, (911), 643 states have call predecessors, (911), 609 states have call successors, (911) [2021-12-22 13:14:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 7869 transitions. [2021-12-22 13:14:55,190 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 7869 transitions. Word has length 110 [2021-12-22 13:14:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:55,191 INFO L470 AbstractCegarLoop]: Abstraction has 5811 states and 7869 transitions. [2021-12-22 13:14:55,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:14:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 7869 transitions. [2021-12-22 13:14:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-22 13:14:55,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:55,200 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-22 13:14:55,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:14:55,417 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,SelfDestructingSolverStorable16 [2021-12-22 13:14:55,417 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2129974432, now seen corresponding path program 1 times [2021-12-22 13:14:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304501201] [2021-12-22 13:14:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:55,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:14:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:14:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:14:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:14:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:14:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:14:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:55,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304501201] [2021-12-22 13:14:55,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304501201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:55,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940323735] [2021-12-22 13:14:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:55,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:55,502 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) [2021-12-22 13:14:55,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:14:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:14:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:14:55,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:14:55,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940323735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:55,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:14:55,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:14:55,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569132218] [2021-12-22 13:14:55,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:14:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:14:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:55,791 INFO L87 Difference]: Start difference. First operand 5811 states and 7869 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 13:14:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:56,121 INFO L93 Difference]: Finished difference Result 12513 states and 17650 transitions. [2021-12-22 13:14:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:14:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-22 13:14:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:56,147 INFO L225 Difference]: With dead ends: 12513 [2021-12-22 13:14:56,148 INFO L226 Difference]: Without dead ends: 9067 [2021-12-22 13:14:56,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:56,159 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 240 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 494 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 [2021-12-22 13:14:56,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 494 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:14:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9067 states. [2021-12-22 13:14:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9067 to 8999. [2021-12-22 13:14:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 7396 states have (on average 1.3716873985938345) internal successors, (10145), 7517 states have internal predecessors, (10145), 903 states have call successors, (903), 571 states have call predecessors, (903), 698 states have return successors, (1355), 920 states have call predecessors, (1355), 901 states have call successors, (1355) [2021-12-22 13:14:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 12403 transitions. [2021-12-22 13:14:56,624 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 12403 transitions. Word has length 142 [2021-12-22 13:14:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:56,624 INFO L470 AbstractCegarLoop]: Abstraction has 8999 states and 12403 transitions. [2021-12-22 13:14:56,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 13:14:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 12403 transitions. [2021-12-22 13:14:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-22 13:14:56,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:56,637 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-22 13:14:56,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:14:56,851 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,SelfDestructingSolverStorable17 [2021-12-22 13:14:56,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1310340904, now seen corresponding path program 1 times [2021-12-22 13:14:56,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:56,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496305281] [2021-12-22 13:14:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:56,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:14:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:14:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:14:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:14:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:14:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:14:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:14:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:14:56,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496305281] [2021-12-22 13:14:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496305281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310117546] [2021-12-22 13:14:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:56,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:56,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:56,948 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) [2021-12-22 13:14:56,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:14:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:14:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:14:57,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:14:57,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310117546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:57,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:14:57,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:14:57,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598033809] [2021-12-22 13:14:57,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:57,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:14:57,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:14:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:57,233 INFO L87 Difference]: Start difference. First operand 8999 states and 12403 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 13:14:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:57,657 INFO L93 Difference]: Finished difference Result 16231 states and 22959 transitions. [2021-12-22 13:14:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:14:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-22 13:14:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:57,692 INFO L225 Difference]: With dead ends: 16231 [2021-12-22 13:14:57,692 INFO L226 Difference]: Without dead ends: 12073 [2021-12-22 13:14:57,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:57,708 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 241 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 502 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 [2021-12-22 13:14:57,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 502 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:14:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12073 states. [2021-12-22 13:14:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12073 to 11975. [2021-12-22 13:14:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11975 states, 9897 states have (on average 1.3837526523188846) internal successors, (13695), 10052 states have internal predecessors, (13695), 1179 states have call successors, (1179), 746 states have call predecessors, (1179), 897 states have return successors, (1750), 1186 states have call predecessors, (1750), 1177 states have call successors, (1750) [2021-12-22 13:14:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11975 states to 11975 states and 16624 transitions. [2021-12-22 13:14:58,225 INFO L78 Accepts]: Start accepts. Automaton has 11975 states and 16624 transitions. Word has length 142 [2021-12-22 13:14:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:58,226 INFO L470 AbstractCegarLoop]: Abstraction has 11975 states and 16624 transitions. [2021-12-22 13:14:58,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 13:14:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 11975 states and 16624 transitions. [2021-12-22 13:14:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 13:14:58,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:58,240 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-22 13:14:58,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:14:58,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:58,458 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1742334647, now seen corresponding path program 1 times [2021-12-22 13:14:58,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:58,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092629623] [2021-12-22 13:14:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:58,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:14:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:14:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:14:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:14:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 13:14:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:14:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-22 13:14:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:14:58,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092629623] [2021-12-22 13:14:58,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092629623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474962512] [2021-12-22 13:14:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:58,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:58,558 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) [2021-12-22 13:14:58,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:14:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:14:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:14:58,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:14:58,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474962512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:58,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:14:58,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:14:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885784809] [2021-12-22 13:14:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:14:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:14:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:58,861 INFO L87 Difference]: Start difference. First operand 11975 states and 16624 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:14:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:59,339 INFO L93 Difference]: Finished difference Result 16300 states and 21939 transitions. [2021-12-22 13:14:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:14:59,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-22 13:14:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:59,373 INFO L225 Difference]: With dead ends: 16300 [2021-12-22 13:14:59,373 INFO L226 Difference]: Without dead ends: 14112 [2021-12-22 13:14:59,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:59,380 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 61 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:59,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 647 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:14:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14112 states. [2021-12-22 13:14:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14112 to 14067. [2021-12-22 13:14:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14067 states, 11522 states have (on average 1.3576636000694324) internal successors, (15643), 11706 states have internal predecessors, (15643), 1413 states have call successors, (1413), 928 states have call predecessors, (1413), 1130 states have return successors, (2057), 1442 states have call predecessors, (2057), 1411 states have call successors, (2057) [2021-12-22 13:14:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14067 states to 14067 states and 19113 transitions. [2021-12-22 13:14:59,924 INFO L78 Accepts]: Start accepts. Automaton has 14067 states and 19113 transitions. Word has length 163 [2021-12-22 13:14:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 14067 states and 19113 transitions. [2021-12-22 13:14:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:14:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14067 states and 19113 transitions. [2021-12-22 13:14:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:14:59,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:59,980 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, 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] [2021-12-22 13:14:59,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:00,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:00,191 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash -268333173, now seen corresponding path program 1 times [2021-12-22 13:15:00,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468087623] [2021-12-22 13:15:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:00,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:15:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:15:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:15:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 13:15:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 13:15:00,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468087623] [2021-12-22 13:15:00,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468087623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613601037] [2021-12-22 13:15:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:00,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:00,277 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) [2021-12-22 13:15:00,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:15:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:15:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:15:00,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:00,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613601037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:00,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:00,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:00,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889886991] [2021-12-22 13:15:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:00,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:00,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:00,590 INFO L87 Difference]: Start difference. First operand 14067 states and 19113 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:15:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:01,213 INFO L93 Difference]: Finished difference Result 22835 states and 31619 transitions. [2021-12-22 13:15:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-22 13:15:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:01,255 INFO L225 Difference]: With dead ends: 22835 [2021-12-22 13:15:01,255 INFO L226 Difference]: Without dead ends: 13226 [2021-12-22 13:15:01,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:01,286 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 260 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:01,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 357 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13226 states. [2021-12-22 13:15:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13226 to 13226. [2021-12-22 13:15:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 10886 states have (on average 1.3172882601506521) internal successors, (14340), 11034 states have internal predecessors, (14340), 1261 states have call successors, (1261), 891 states have call predecessors, (1261), 1077 states have return successors, (1782), 1310 states have call predecessors, (1782), 1259 states have call successors, (1782) [2021-12-22 13:15:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 17383 transitions. [2021-12-22 13:15:01,963 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 17383 transitions. Word has length 159 [2021-12-22 13:15:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:01,963 INFO L470 AbstractCegarLoop]: Abstraction has 13226 states and 17383 transitions. [2021-12-22 13:15:01,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:15:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 17383 transitions. [2021-12-22 13:15:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:15:01,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:01,975 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, 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] [2021-12-22 13:15:01,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:02,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:02,192 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1542492939, now seen corresponding path program 1 times [2021-12-22 13:15:02,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760613906] [2021-12-22 13:15:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:02,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:15:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:15:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:15:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 13:15:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 13:15:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760613906] [2021-12-22 13:15:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760613906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751855103] [2021-12-22 13:15:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:02,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:02,288 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) [2021-12-22 13:15:02,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:15:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:15:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 13:15:02,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:02,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751855103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:02,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413276509] [2021-12-22 13:15:02,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:02,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:02,585 INFO L87 Difference]: Start difference. First operand 13226 states and 17383 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:15:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:03,195 INFO L93 Difference]: Finished difference Result 22770 states and 30332 transitions. [2021-12-22 13:15:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 159 [2021-12-22 13:15:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:03,234 INFO L225 Difference]: With dead ends: 22770 [2021-12-22 13:15:03,234 INFO L226 Difference]: Without dead ends: 14002 [2021-12-22 13:15:03,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:03,253 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 299 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:03,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 503 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14002 states. [2021-12-22 13:15:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14002 to 13857. [2021-12-22 13:15:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13857 states, 11476 states have (on average 1.294963401882189) internal successors, (14861), 11619 states have internal predecessors, (14861), 1260 states have call successors, (1260), 930 states have call predecessors, (1260), 1119 states have return successors, (1767), 1317 states have call predecessors, (1767), 1258 states have call successors, (1767) [2021-12-22 13:15:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13857 states to 13857 states and 17888 transitions. [2021-12-22 13:15:03,974 INFO L78 Accepts]: Start accepts. Automaton has 13857 states and 17888 transitions. Word has length 159 [2021-12-22 13:15:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:03,974 INFO L470 AbstractCegarLoop]: Abstraction has 13857 states and 17888 transitions. [2021-12-22 13:15:03,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:15:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 13857 states and 17888 transitions. [2021-12-22 13:15:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 13:15:03,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:03,987 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, 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] [2021-12-22 13:15:04,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:04,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:04,199 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1281698088, now seen corresponding path program 1 times [2021-12-22 13:15:04,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:04,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941512319] [2021-12-22 13:15:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:04,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:15:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:15:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:15:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:15:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 13:15:04,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941512319] [2021-12-22 13:15:04,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941512319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721848132] [2021-12-22 13:15:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:04,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:04,286 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) [2021-12-22 13:15:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:15:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:15:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:15:04,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721848132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:04,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:04,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:04,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075238959] [2021-12-22 13:15:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:04,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:04,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:04,530 INFO L87 Difference]: Start difference. First operand 13857 states and 17888 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 13:15:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:05,519 INFO L93 Difference]: Finished difference Result 32314 states and 42790 transitions. [2021-12-22 13:15:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-22 13:15:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:05,580 INFO L225 Difference]: With dead ends: 32314 [2021-12-22 13:15:05,580 INFO L226 Difference]: Without dead ends: 22915 [2021-12-22 13:15:05,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:05,601 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 286 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:05,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 530 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22915 states. [2021-12-22 13:15:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22915 to 22812. [2021-12-22 13:15:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22812 states, 19108 states have (on average 1.3007640778731422) internal successors, (24855), 19331 states have internal predecessors, (24855), 1973 states have call successors, (1973), 1476 states have call predecessors, (1973), 1729 states have return successors, (3227), 2022 states have call predecessors, (3227), 1971 states have call successors, (3227) [2021-12-22 13:15:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22812 states to 22812 states and 30055 transitions. [2021-12-22 13:15:06,863 INFO L78 Accepts]: Start accepts. Automaton has 22812 states and 30055 transitions. Word has length 160 [2021-12-22 13:15:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:06,864 INFO L470 AbstractCegarLoop]: Abstraction has 22812 states and 30055 transitions. [2021-12-22 13:15:06,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 13:15:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22812 states and 30055 transitions. [2021-12-22 13:15:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 13:15:06,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:06,885 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, 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] [2021-12-22 13:15:06,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:07,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:07,093 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1321921686, now seen corresponding path program 1 times [2021-12-22 13:15:07,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:07,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241649645] [2021-12-22 13:15:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:07,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:15:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:15:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:15:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:15:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:15:07,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241649645] [2021-12-22 13:15:07,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241649645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:07,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:07,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:15:07,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378914047] [2021-12-22 13:15:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:07,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:07,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:15:07,156 INFO L87 Difference]: Start difference. First operand 22812 states and 30055 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:15:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:08,622 INFO L93 Difference]: Finished difference Result 39262 states and 52135 transitions. [2021-12-22 13:15:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:15:08,622 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), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-22 13:15:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:08,668 INFO L225 Difference]: With dead ends: 39262 [2021-12-22 13:15:08,668 INFO L226 Difference]: Without dead ends: 20907 [2021-12-22 13:15:08,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:15:08,694 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 417 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:08,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 658 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:15:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-12-22 13:15:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 19245. [2021-12-22 13:15:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19245 states, 16078 states have (on average 1.3000373180743874) internal successors, (20902), 16345 states have internal predecessors, (20902), 1610 states have call successors, (1610), 1198 states have call predecessors, (1610), 1555 states have return successors, (2726), 1711 states have call predecessors, (2726), 1608 states have call successors, (2726) [2021-12-22 13:15:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19245 states to 19245 states and 25238 transitions. [2021-12-22 13:15:09,621 INFO L78 Accepts]: Start accepts. Automaton has 19245 states and 25238 transitions. Word has length 160 [2021-12-22 13:15:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:09,621 INFO L470 AbstractCegarLoop]: Abstraction has 19245 states and 25238 transitions. [2021-12-22 13:15:09,622 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), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:15:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 19245 states and 25238 transitions. [2021-12-22 13:15:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:15:09,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:09,637 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, 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] [2021-12-22 13:15:09,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:15:09,638 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1755889720, now seen corresponding path program 1 times [2021-12-22 13:15:09,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:09,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565228024] [2021-12-22 13:15:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:09,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:15:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 13:15:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:15:09,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565228024] [2021-12-22 13:15:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565228024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494710684] [2021-12-22 13:15:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:09,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:09,714 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) [2021-12-22 13:15:09,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:15:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:15:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 13:15:09,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:09,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494710684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:09,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:09,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:09,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360640167] [2021-12-22 13:15:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:09,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:09,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:09,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:09,962 INFO L87 Difference]: Start difference. First operand 19245 states and 25238 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:15:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:10,924 INFO L93 Difference]: Finished difference Result 29840 states and 40378 transitions. [2021-12-22 13:15:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-22 13:15:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:10,966 INFO L225 Difference]: With dead ends: 29840 [2021-12-22 13:15:10,966 INFO L226 Difference]: Without dead ends: 19329 [2021-12-22 13:15:10,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:10,987 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 129 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 771 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 [2021-12-22 13:15:10,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 771 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19329 states. [2021-12-22 13:15:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19329 to 19245. [2021-12-22 13:15:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19245 states, 16078 states have (on average 1.2757183729319568) internal successors, (20511), 16345 states have internal predecessors, (20511), 1610 states have call successors, (1610), 1198 states have call predecessors, (1610), 1555 states have return successors, (2726), 1711 states have call predecessors, (2726), 1608 states have call successors, (2726) [2021-12-22 13:15:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19245 states to 19245 states and 24847 transitions. [2021-12-22 13:15:11,925 INFO L78 Accepts]: Start accepts. Automaton has 19245 states and 24847 transitions. Word has length 162 [2021-12-22 13:15:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 19245 states and 24847 transitions. [2021-12-22 13:15:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:15:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 19245 states and 24847 transitions. [2021-12-22 13:15:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:15:11,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:11,939 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, 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] [2021-12-22 13:15:11,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:12,140 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,SelfDestructingSolverStorable24 [2021-12-22 13:15:12,140 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1035796568, now seen corresponding path program 1 times [2021-12-22 13:15:12,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:12,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950767750] [2021-12-22 13:15:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:12,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:15:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 13:15:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:15:12,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950767750] [2021-12-22 13:15:12,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950767750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706623325] [2021-12-22 13:15:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:12,239 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) [2021-12-22 13:15:12,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:15:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:12,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:15:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:15:12,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706623325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:12,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:12,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:12,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273496865] [2021-12-22 13:15:12,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:12,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:12,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:12,521 INFO L87 Difference]: Start difference. First operand 19245 states and 24847 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:15:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:13,460 INFO L93 Difference]: Finished difference Result 31799 states and 42237 transitions. [2021-12-22 13:15:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-22 13:15:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:13,498 INFO L225 Difference]: With dead ends: 31799 [2021-12-22 13:15:13,498 INFO L226 Difference]: Without dead ends: 18766 [2021-12-22 13:15:13,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:13,516 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 273 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:13,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 353 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-12-22 13:15:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 14280. [2021-12-22 13:15:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14280 states, 11865 states have (on average 1.2332069110830173) internal successors, (14632), 12046 states have internal predecessors, (14632), 1232 states have call successors, (1232), 923 states have call predecessors, (1232), 1181 states have return successors, (1900), 1316 states have call predecessors, (1900), 1230 states have call successors, (1900) [2021-12-22 13:15:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14280 states to 14280 states and 17764 transitions. [2021-12-22 13:15:14,308 INFO L78 Accepts]: Start accepts. Automaton has 14280 states and 17764 transitions. Word has length 162 [2021-12-22 13:15:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:14,308 INFO L470 AbstractCegarLoop]: Abstraction has 14280 states and 17764 transitions. [2021-12-22 13:15:14,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 13:15:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14280 states and 17764 transitions. [2021-12-22 13:15:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 13:15:14,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:14,315 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, 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] [2021-12-22 13:15:14,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:14,523 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,SelfDestructingSolverStorable25 [2021-12-22 13:15:14,524 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1007655319, now seen corresponding path program 1 times [2021-12-22 13:15:14,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:14,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900095186] [2021-12-22 13:15:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:14,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:15:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:15:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:15:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-22 13:15:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-22 13:15:14,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900095186] [2021-12-22 13:15:14,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900095186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510096740] [2021-12-22 13:15:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:14,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:14,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:14,604 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) [2021-12-22 13:15:14,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:15:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:15:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:15:14,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:14,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510096740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:14,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:14,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:15:14,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968062231] [2021-12-22 13:15:14,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:14,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:14,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:14,879 INFO L87 Difference]: Start difference. First operand 14280 states and 17764 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:15:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:16,063 INFO L93 Difference]: Finished difference Result 31933 states and 40362 transitions. [2021-12-22 13:15:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:16,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-22 13:15:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:16,155 INFO L225 Difference]: With dead ends: 31933 [2021-12-22 13:15:16,156 INFO L226 Difference]: Without dead ends: 22111 [2021-12-22 13:15:16,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:15:16,177 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 136 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 786 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 [2021-12-22 13:15:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 786 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22111 states. [2021-12-22 13:15:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22111 to 22109. [2021-12-22 13:15:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22109 states, 18503 states have (on average 1.2373128681835377) internal successors, (22894), 18781 states have internal predecessors, (22894), 1863 states have call successors, (1863), 1389 states have call predecessors, (1863), 1741 states have return successors, (3153), 1948 states have call predecessors, (3153), 1861 states have call successors, (3153) [2021-12-22 13:15:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22109 states to 22109 states and 27910 transitions. [2021-12-22 13:15:17,684 INFO L78 Accepts]: Start accepts. Automaton has 22109 states and 27910 transitions. Word has length 163 [2021-12-22 13:15:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:17,685 INFO L470 AbstractCegarLoop]: Abstraction has 22109 states and 27910 transitions. [2021-12-22 13:15:17,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:15:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 22109 states and 27910 transitions. [2021-12-22 13:15:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:15:17,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:17,700 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, 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] [2021-12-22 13:15:17,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:17,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 13:15:17,917 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1197312820, now seen corresponding path program 1 times [2021-12-22 13:15:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103718593] [2021-12-22 13:15:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:17,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:15:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 13:15:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 13:15:18,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:18,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103718593] [2021-12-22 13:15:18,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103718593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:18,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628600152] [2021-12-22 13:15:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:18,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:18,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:18,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:18,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:15:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:15:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 13:15:18,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628600152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:18,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:18,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:15:18,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896026850] [2021-12-22 13:15:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:18,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:15:18,339 INFO L87 Difference]: Start difference. First operand 22109 states and 27910 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:19,843 INFO L93 Difference]: Finished difference Result 39712 states and 50761 transitions. [2021-12-22 13:15:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:15:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-22 13:15:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:19,888 INFO L225 Difference]: With dead ends: 39712 [2021-12-22 13:15:19,889 INFO L226 Difference]: Without dead ends: 22061 [2021-12-22 13:15:19,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:19,908 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 363 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:19,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 581 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:15:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22061 states. [2021-12-22 13:15:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22061 to 22061. [2021-12-22 13:15:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22061 states, 18455 states have (on average 1.2119208886480628) internal successors, (22366), 18733 states have internal predecessors, (22366), 1863 states have call successors, (1863), 1389 states have call predecessors, (1863), 1741 states have return successors, (3153), 1948 states have call predecessors, (3153), 1861 states have call successors, (3153) [2021-12-22 13:15:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22061 states to 22061 states and 27382 transitions. [2021-12-22 13:15:21,180 INFO L78 Accepts]: Start accepts. Automaton has 22061 states and 27382 transitions. Word has length 164 [2021-12-22 13:15:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:21,180 INFO L470 AbstractCegarLoop]: Abstraction has 22061 states and 27382 transitions. [2021-12-22 13:15:21,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22061 states and 27382 transitions. [2021-12-22 13:15:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:15:21,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:21,194 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, 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] [2021-12-22 13:15:21,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 13:15:21,395 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1815482190, now seen corresponding path program 1 times [2021-12-22 13:15:21,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41484450] [2021-12-22 13:15:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:21,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:15:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 13:15:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 13:15:21,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:21,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41484450] [2021-12-22 13:15:21,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41484450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954791825] [2021-12-22 13:15:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:21,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:21,485 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:21,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:15:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:15:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 13:15:21,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:21,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954791825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:21,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:21,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:15:21,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089297481] [2021-12-22 13:15:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:21,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:21,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:15:21,791 INFO L87 Difference]: Start difference. First operand 22061 states and 27382 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:23,363 INFO L93 Difference]: Finished difference Result 38588 states and 49068 transitions. [2021-12-22 13:15:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:15:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-22 13:15:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:23,410 INFO L225 Difference]: With dead ends: 38588 [2021-12-22 13:15:23,411 INFO L226 Difference]: Without dead ends: 21677 [2021-12-22 13:15:23,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:15:23,432 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 390 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:23,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 595 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:15:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21677 states. [2021-12-22 13:15:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21677 to 19686. [2021-12-22 13:15:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19686 states, 16454 states have (on average 1.1835419958672664) internal successors, (19474), 16693 states have internal predecessors, (19474), 1671 states have call successors, (1671), 1249 states have call predecessors, (1671), 1559 states have return successors, (2692), 1749 states have call predecessors, (2692), 1669 states have call successors, (2692) [2021-12-22 13:15:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19686 states to 19686 states and 23837 transitions. [2021-12-22 13:15:24,639 INFO L78 Accepts]: Start accepts. Automaton has 19686 states and 23837 transitions. Word has length 164 [2021-12-22 13:15:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:24,639 INFO L470 AbstractCegarLoop]: Abstraction has 19686 states and 23837 transitions. [2021-12-22 13:15:24,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19686 states and 23837 transitions. [2021-12-22 13:15:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:15:24,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:24,649 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, 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] [2021-12-22 13:15:24,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:24,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 13:15:24,850 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash 93479504, now seen corresponding path program 1 times [2021-12-22 13:15:24,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:24,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833709217] [2021-12-22 13:15:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:24,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:15:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 13:15:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 13:15:24,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833709217] [2021-12-22 13:15:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833709217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472349039] [2021-12-22 13:15:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:24,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:24,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:24,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:15:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:25,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:15:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 13:15:25,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:25,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472349039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:25,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:25,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:15:25,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217108083] [2021-12-22 13:15:25,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:25,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:25,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:15:25,239 INFO L87 Difference]: Start difference. First operand 19686 states and 23837 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:26,421 INFO L93 Difference]: Finished difference Result 28246 states and 34475 transitions. [2021-12-22 13:15:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:15:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-22 13:15:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:26,463 INFO L225 Difference]: With dead ends: 28246 [2021-12-22 13:15:26,463 INFO L226 Difference]: Without dead ends: 17386 [2021-12-22 13:15:26,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:26,483 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 354 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:26,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 567 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:15:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17386 states. [2021-12-22 13:15:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17386 to 14165. [2021-12-22 13:15:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14165 states, 11759 states have (on average 1.1724636448677608) internal successors, (13787), 11923 states have internal predecessors, (13787), 1253 states have call successors, (1253), 919 states have call predecessors, (1253), 1151 states have return successors, (1959), 1326 states have call predecessors, (1959), 1251 states have call successors, (1959) [2021-12-22 13:15:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14165 states to 14165 states and 16999 transitions. [2021-12-22 13:15:27,548 INFO L78 Accepts]: Start accepts. Automaton has 14165 states and 16999 transitions. Word has length 164 [2021-12-22 13:15:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:27,548 INFO L470 AbstractCegarLoop]: Abstraction has 14165 states and 16999 transitions. [2021-12-22 13:15:27,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14165 states and 16999 transitions. [2021-12-22 13:15:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:15:27,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:27,554 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, 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] [2021-12-22 13:15:27,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:27,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:27,755 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -999155698, now seen corresponding path program 1 times [2021-12-22 13:15:27,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537244063] [2021-12-22 13:15:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:27,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:15:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 13:15:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 13:15:27,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537244063] [2021-12-22 13:15:27,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537244063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201441955] [2021-12-22 13:15:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:27,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:27,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:27,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:27,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:15:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:15:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:15:28,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:28,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201441955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:28,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:28,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 13:15:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836916323] [2021-12-22 13:15:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:28,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:28,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:28,084 INFO L87 Difference]: Start difference. First operand 14165 states and 16999 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:29,043 INFO L93 Difference]: Finished difference Result 23957 states and 29154 transitions. [2021-12-22 13:15:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:15:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-22 13:15:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:29,078 INFO L225 Difference]: With dead ends: 23957 [2021-12-22 13:15:29,078 INFO L226 Difference]: Without dead ends: 14252 [2021-12-22 13:15:29,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:15:29,098 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 49 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:29,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1254 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14252 states. [2021-12-22 13:15:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14252 to 14012. [2021-12-22 13:15:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14012 states, 11622 states have (on average 1.1591808638788506) internal successors, (13472), 11775 states have internal predecessors, (13472), 1253 states have call successors, (1253), 919 states have call predecessors, (1253), 1135 states have return successors, (1859), 1321 states have call predecessors, (1859), 1251 states have call successors, (1859) [2021-12-22 13:15:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14012 states to 14012 states and 16584 transitions. [2021-12-22 13:15:30,161 INFO L78 Accepts]: Start accepts. Automaton has 14012 states and 16584 transitions. Word has length 164 [2021-12-22 13:15:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:30,161 INFO L470 AbstractCegarLoop]: Abstraction has 14012 states and 16584 transitions. [2021-12-22 13:15:30,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 14012 states and 16584 transitions. [2021-12-22 13:15:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:15:30,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:30,166 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, 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] [2021-12-22 13:15:30,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:30,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:30,367 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1766359060, now seen corresponding path program 1 times [2021-12-22 13:15:30,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:30,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354319255] [2021-12-22 13:15:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:30,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:15:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:15:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:15:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:15:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:15:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:15:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 13:15:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-22 13:15:30,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354319255] [2021-12-22 13:15:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354319255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609137566] [2021-12-22 13:15:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:30,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:30,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:30,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 13:15:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:15:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 13:15:30,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:30,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609137566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:30,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:30,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 13:15:30,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665216307] [2021-12-22 13:15:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:30,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:15:30,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:15:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:30,759 INFO L87 Difference]: Start difference. First operand 14012 states and 16584 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:31,589 INFO L93 Difference]: Finished difference Result 20327 states and 24227 transitions. [2021-12-22 13:15:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:15:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-22 13:15:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:31,612 INFO L225 Difference]: With dead ends: 20327 [2021-12-22 13:15:31,612 INFO L226 Difference]: Without dead ends: 10772 [2021-12-22 13:15:31,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:15:31,627 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 10 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:31,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1239 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10772 states. [2021-12-22 13:15:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10772 to 10736. [2021-12-22 13:15:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10736 states, 8846 states have (on average 1.1583766674203029) internal successors, (10247), 8965 states have internal predecessors, (10247), 982 states have call successors, (982), 719 states have call predecessors, (982), 906 states have return successors, (1369), 1054 states have call predecessors, (1369), 980 states have call successors, (1369) [2021-12-22 13:15:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10736 states to 10736 states and 12598 transitions. [2021-12-22 13:15:32,380 INFO L78 Accepts]: Start accepts. Automaton has 10736 states and 12598 transitions. Word has length 164 [2021-12-22 13:15:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:32,380 INFO L470 AbstractCegarLoop]: Abstraction has 10736 states and 12598 transitions. [2021-12-22 13:15:32,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 13:15:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 10736 states and 12598 transitions. [2021-12-22 13:15:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-22 13:15:32,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:32,385 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2021-12-22 13:15:32,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:32,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:32,586 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:32,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1870747336, now seen corresponding path program 1 times [2021-12-22 13:15:32,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:32,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317844589] [2021-12-22 13:15:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:32,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:15:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:15:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:15:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:15:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:15:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:15:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:15:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:15:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:15:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:15:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:15:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-22 13:15:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-22 13:15:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-22 13:15:32,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317844589] [2021-12-22 13:15:32,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317844589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012128336] [2021-12-22 13:15:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:32,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:32,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:32,683 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:32,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 13:15:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:15:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:15:33,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:33,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012128336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:33,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:33,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:15:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012832310] [2021-12-22 13:15:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:33,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:33,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:33,021 INFO L87 Difference]: Start difference. First operand 10736 states and 12598 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 13:15:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:33,953 INFO L93 Difference]: Finished difference Result 19604 states and 23336 transitions. [2021-12-22 13:15:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 195 [2021-12-22 13:15:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:33,981 INFO L225 Difference]: With dead ends: 19604 [2021-12-22 13:15:33,982 INFO L226 Difference]: Without dead ends: 15170 [2021-12-22 13:15:33,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:33,991 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 52 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:33,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 615 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15170 states. [2021-12-22 13:15:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15170 to 15160. [2021-12-22 13:15:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15160 states, 12283 states have (on average 1.1693397378490598) internal successors, (14363), 12462 states have internal predecessors, (14363), 1482 states have call successors, (1482), 1083 states have call predecessors, (1482), 1393 states have return successors, (2062), 1617 states have call predecessors, (2062), 1480 states have call successors, (2062) [2021-12-22 13:15:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15160 states to 15160 states and 17907 transitions. [2021-12-22 13:15:34,980 INFO L78 Accepts]: Start accepts. Automaton has 15160 states and 17907 transitions. Word has length 195 [2021-12-22 13:15:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 15160 states and 17907 transitions. [2021-12-22 13:15:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 13:15:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 15160 states and 17907 transitions. [2021-12-22 13:15:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-22 13:15:34,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:34,987 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2021-12-22 13:15:35,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 13:15:35,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-22 13:15:35,188 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1526826682, now seen corresponding path program 1 times [2021-12-22 13:15:35,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:35,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913226965] [2021-12-22 13:15:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:35,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:15:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:15:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:15:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:15:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:15:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:15:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:15:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:15:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:15:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:15:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:15:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:15:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:15:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:15:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-22 13:15:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-22 13:15:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-22 13:15:35,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:35,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913226965] [2021-12-22 13:15:35,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913226965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:15:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198238896] [2021-12-22 13:15:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:35,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:15:35,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:15:35,303 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:15:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 13:15:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:15:35,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:15:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-22 13:15:35,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:15:35,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198238896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:35,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:15:35,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 13:15:35,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78159135] [2021-12-22 13:15:35,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:35,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:15:35,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:15:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:35,665 INFO L87 Difference]: Start difference. First operand 15160 states and 17907 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-22 13:15:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:36,668 INFO L93 Difference]: Finished difference Result 21690 states and 26147 transitions. [2021-12-22 13:15:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:15:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 195 [2021-12-22 13:15:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:36,681 INFO L225 Difference]: With dead ends: 21690 [2021-12-22 13:15:36,681 INFO L226 Difference]: Without dead ends: 6291 [2021-12-22 13:15:36,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:15:36,696 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:36,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 296 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:15:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states.