./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:52:29,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:52:29,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:52:29,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:52:29,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:52:29,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:52:29,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:52:29,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:52:29,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:52:29,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:52:29,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:52:29,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:52:29,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:52:29,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:52:29,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:52:29,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:52:29,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:52:29,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:52:29,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:52:29,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:52:29,757 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:52:29,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:52:29,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:52:29,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:52:29,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:52:29,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:52:29,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:52:29,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:52:29,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:52:29,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:52:29,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:52:29,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:52:29,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:52:29,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:52:29,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:52:29,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:52:29,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:52:29,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:52:29,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:52:29,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:52:29,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:52:29,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:52:29,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:52:29,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:52:29,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:52:29,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:52:29,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:52:29,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:52:29,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:52:29,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:52:29,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:52:29,809 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:52:29,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:52:29,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:52:29,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:52:29,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:52:29,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:52:29,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:52:29,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:52:29,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:52:29,812 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:52:29,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:52:29,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:52:29,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:52:29,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:52:29,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:52:29,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:52:29,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:52:29,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:52:29,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:52:29,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:52:29,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:52:29,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:52:29,815 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:52:29,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:52:29,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:52:29,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 [2022-07-22 20:52:30,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:52:30,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:52:30,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:52:30,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:52:30,039 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:52:30,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-07-22 20:52:30,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28afaa97d/9a0e08ac16c34add934641fb818949f4/FLAGb76f5cd93 [2022-07-22 20:52:30,495 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:52:30,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-07-22 20:52:30,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28afaa97d/9a0e08ac16c34add934641fb818949f4/FLAGb76f5cd93 [2022-07-22 20:52:30,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28afaa97d/9a0e08ac16c34add934641fb818949f4 [2022-07-22 20:52:30,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:52:30,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:52:30,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:52:30,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:52:30,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:52:30,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:30,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e357a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30, skipping insertion in model container [2022-07-22 20:52:30,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:30,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:52:30,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:52:30,716 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.08.cil-2.c[911,924] [2022-07-22 20:52:30,766 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.08.cil-2.c[8416,8429] [2022-07-22 20:52:30,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:52:30,887 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:52:30,895 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.08.cil-2.c[911,924] [2022-07-22 20:52:30,912 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.08.cil-2.c[8416,8429] [2022-07-22 20:52:30,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:52:30,960 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:52:30,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30 WrapperNode [2022-07-22 20:52:30,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:52:30,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:52:30,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:52:30,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:52:30,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:30,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,034 INFO L137 Inliner]: procedures = 71, calls = 86, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 851 [2022-07-22 20:52:31,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:52:31,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:52:31,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:52:31,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:52:31,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:52:31,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:52:31,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:52:31,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:52:31,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (1/1) ... [2022-07-22 20:52:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:52:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:52:31,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 20:52:31,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 20:52:31,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:52:31,208 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:52:31,208 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:52:31,208 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-22 20:52:31,211 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-22 20:52:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:52:31,211 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:52:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:52:31,212 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:52:31,212 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-22 20:52:31,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-22 20:52:31,212 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:52:31,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:52:31,212 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:52:31,213 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:52:31,213 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:52:31,214 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-22 20:52:31,214 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-22 20:52:31,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:52:31,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:52:31,214 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:52:31,214 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:52:31,214 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:52:31,214 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:52:31,332 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:52:31,336 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:52:31,896 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-07-22 20:52:31,897 INFO L764 $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; [2022-07-22 20:52:31,971 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:52:31,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:52:31,987 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2022-07-22 20:52:31,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:52:31 BoogieIcfgContainer [2022-07-22 20:52:31,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:52:31,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:52:31,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:52:31,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:52:31,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:52:30" (1/3) ... [2022-07-22 20:52:31,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15159357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:52:31, skipping insertion in model container [2022-07-22 20:52:31,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:52:30" (2/3) ... [2022-07-22 20:52:31,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15159357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:52:31, skipping insertion in model container [2022-07-22 20:52:31,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:52:31" (3/3) ... [2022-07-22 20:52:31,998 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-07-22 20:52:32,010 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:52:32,011 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:52:32,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:52:32,092 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a8108b3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@536b1c3a [2022-07-22 20:52:32,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:52:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-22 20:52:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:52:32,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:32,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:32,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1818401175, now seen corresponding path program 1 times [2022-07-22 20:52:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061027444] [2022-07-22 20:52:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:32,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:52:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:52:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061027444] [2022-07-22 20:52:32,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061027444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:32,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:32,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:52:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026361901] [2022-07-22 20:52:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:52:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:52:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:52:32,538 INFO L87 Difference]: Start difference. First operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) 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) [2022-07-22 20:52:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:33,570 INFO L93 Difference]: Finished difference Result 940 states and 1489 transitions. [2022-07-22 20:52:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:52:33,573 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 [2022-07-22 20:52:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:33,593 INFO L225 Difference]: With dead ends: 940 [2022-07-22 20:52:33,593 INFO L226 Difference]: Without dead ends: 547 [2022-07-22 20:52:33,598 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:52:33,601 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 745 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:33,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 2060 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:52:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-22 20:52:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 508. [2022-07-22 20:52:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 431 states have (on average 1.5127610208816706) internal successors, (652), 438 states have internal predecessors, (652), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2022-07-22 20:52:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 759 transitions. [2022-07-22 20:52:33,703 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 759 transitions. Word has length 65 [2022-07-22 20:52:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:33,704 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 759 transitions. [2022-07-22 20:52:33,704 INFO L496 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) [2022-07-22 20:52:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 759 transitions. [2022-07-22 20:52:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:52:33,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:33,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:52:33,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash -139512535, now seen corresponding path program 1 times [2022-07-22 20:52:33,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:33,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524238490] [2022-07-22 20:52:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:52:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:52:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:33,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:33,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524238490] [2022-07-22 20:52:33,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524238490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:33,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:33,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:52:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526050290] [2022-07-22 20:52:33,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:52:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:52:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:52:33,821 INFO L87 Difference]: Start difference. First operand 508 states and 759 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:52:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:34,879 INFO L93 Difference]: Finished difference Result 905 states and 1325 transitions. [2022-07-22 20:52:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 20:52:34,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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 [2022-07-22 20:52:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:34,885 INFO L225 Difference]: With dead ends: 905 [2022-07-22 20:52:34,885 INFO L226 Difference]: Without dead ends: 696 [2022-07-22 20:52:34,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:52:34,887 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 1447 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:34,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 2082 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:52:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-22 20:52:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 620. [2022-07-22 20:52:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 521 states have (on average 1.493282149712092) internal successors, (778), 530 states have internal predecessors, (778), 66 states have call successors, (66), 29 states have call predecessors, (66), 31 states have return successors, (75), 64 states have call predecessors, (75), 62 states have call successors, (75) [2022-07-22 20:52:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 919 transitions. [2022-07-22 20:52:34,924 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 919 transitions. Word has length 65 [2022-07-22 20:52:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:34,924 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 919 transitions. [2022-07-22 20:52:34,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 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) [2022-07-22 20:52:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 919 transitions. [2022-07-22 20:52:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:52:34,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:34,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:52:34,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2126868651, now seen corresponding path program 1 times [2022-07-22 20:52:34,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:34,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019980149] [2022-07-22 20:52:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:34,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:34,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:52:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:52:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019980149] [2022-07-22 20:52:35,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019980149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:35,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:35,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:35,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840326173] [2022-07-22 20:52:35,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:35,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:35,079 INFO L87 Difference]: Start difference. First operand 620 states and 919 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:35,840 INFO L93 Difference]: Finished difference Result 1292 states and 1861 transitions. [2022-07-22 20:52:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:52:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2022-07-22 20:52:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:35,845 INFO L225 Difference]: With dead ends: 1292 [2022-07-22 20:52:35,846 INFO L226 Difference]: Without dead ends: 977 [2022-07-22 20:52:35,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:52:35,848 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 1551 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:35,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 1635 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:52:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-22 20:52:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 901. [2022-07-22 20:52:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 747 states have (on average 1.4524765729585007) internal successors, (1085), 760 states have internal predecessors, (1085), 96 states have call successors, (96), 50 states have call predecessors, (96), 56 states have return successors, (113), 94 states have call predecessors, (113), 92 states have call successors, (113) [2022-07-22 20:52:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1294 transitions. [2022-07-22 20:52:35,912 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1294 transitions. Word has length 65 [2022-07-22 20:52:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:35,913 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1294 transitions. [2022-07-22 20:52:35,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1294 transitions. [2022-07-22 20:52:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:52:35,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:35,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:35,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:52:35,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2083099193, now seen corresponding path program 1 times [2022-07-22 20:52:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:35,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538210038] [2022-07-22 20:52:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:36,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:52:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:36,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:52:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:52:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:36,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538210038] [2022-07-22 20:52:36,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538210038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:36,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:36,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:52:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650252473] [2022-07-22 20:52:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:52:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:52:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:52:36,048 INFO L87 Difference]: Start difference. First operand 901 states and 1294 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) [2022-07-22 20:52:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:37,047 INFO L93 Difference]: Finished difference Result 1575 states and 2230 transitions. [2022-07-22 20:52:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:52:37,047 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 [2022-07-22 20:52:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:37,054 INFO L225 Difference]: With dead ends: 1575 [2022-07-22 20:52:37,054 INFO L226 Difference]: Without dead ends: 979 [2022-07-22 20:52:37,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:52:37,064 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 508 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:37,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 2658 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:52:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-07-22 20:52:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 916. [2022-07-22 20:52:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 759 states have (on average 1.4413702239789197) internal successors, (1094), 772 states have internal predecessors, (1094), 96 states have call successors, (96), 50 states have call predecessors, (96), 59 states have return successors, (116), 97 states have call predecessors, (116), 92 states have call successors, (116) [2022-07-22 20:52:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1306 transitions. [2022-07-22 20:52:37,110 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1306 transitions. Word has length 66 [2022-07-22 20:52:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1306 transitions. [2022-07-22 20:52:37,111 INFO L496 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) [2022-07-22 20:52:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1306 transitions. [2022-07-22 20:52:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:52:37,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:37,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:37,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:52:37,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1053739895, now seen corresponding path program 1 times [2022-07-22 20:52:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:37,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370593108] [2022-07-22 20:52:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:37,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:52:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:52:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:52:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:37,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:37,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370593108] [2022-07-22 20:52:37,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370593108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:37,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:37,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:52:37,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260490841] [2022-07-22 20:52:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:37,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:52:37,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:52:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:52:37,240 INFO L87 Difference]: Start difference. First operand 916 states and 1306 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:39,286 INFO L93 Difference]: Finished difference Result 3121 states and 4427 transitions. [2022-07-22 20:52:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 20:52:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-07-22 20:52:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:39,293 INFO L225 Difference]: With dead ends: 3121 [2022-07-22 20:52:39,293 INFO L226 Difference]: Without dead ends: 1279 [2022-07-22 20:52:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 20:52:39,298 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 2079 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:39,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2101 Valid, 2827 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:52:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-07-22 20:52:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1124. [2022-07-22 20:52:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 911 states have (on average 1.402854006586169) internal successors, (1278), 928 states have internal predecessors, (1278), 126 states have call successors, (126), 71 states have call predecessors, (126), 85 states have return successors, (165), 128 states have call predecessors, (165), 122 states have call successors, (165) [2022-07-22 20:52:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1569 transitions. [2022-07-22 20:52:39,349 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1569 transitions. Word has length 66 [2022-07-22 20:52:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:39,350 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1569 transitions. [2022-07-22 20:52:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1569 transitions. [2022-07-22 20:52:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 20:52:39,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:39,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:39,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:52:39,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1116762774, now seen corresponding path program 1 times [2022-07-22 20:52:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:39,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45986112] [2022-07-22 20:52:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:52:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:52:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:52:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:52:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:52:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:52:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45986112] [2022-07-22 20:52:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45986112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:39,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:39,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:52:39,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510951338] [2022-07-22 20:52:39,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:39,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:52:39,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:52:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:52:39,442 INFO L87 Difference]: Start difference. First operand 1124 states and 1569 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:40,354 INFO L93 Difference]: Finished difference Result 2309 states and 3194 transitions. [2022-07-22 20:52:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 20:52:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2022-07-22 20:52:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:40,357 INFO L225 Difference]: With dead ends: 2309 [2022-07-22 20:52:40,357 INFO L226 Difference]: Without dead ends: 285 [2022-07-22 20:52:40,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:52:40,362 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 1594 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:40,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1636 Valid, 1973 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:52:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-22 20:52:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-22 20:52:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 20:52:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2022-07-22 20:52:40,372 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 67 [2022-07-22 20:52:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:40,373 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2022-07-22 20:52:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:52:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2022-07-22 20:52:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:40,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:40,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:52:40,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash -765108049, now seen corresponding path program 1 times [2022-07-22 20:52:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:40,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557707243] [2022-07-22 20:52:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557707243] [2022-07-22 20:52:40,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557707243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:40,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:40,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:52:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203402781] [2022-07-22 20:52:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:40,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:52:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:52:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:52:40,478 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:41,222 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2022-07-22 20:52:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:52:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:41,224 INFO L225 Difference]: With dead ends: 659 [2022-07-22 20:52:41,224 INFO L226 Difference]: Without dead ends: 383 [2022-07-22 20:52:41,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:52:41,226 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:41,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 791 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:52:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-22 20:52:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2022-07-22 20:52:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 20:52:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2022-07-22 20:52:41,242 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2022-07-22 20:52:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:41,242 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2022-07-22 20:52:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2022-07-22 20:52:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:41,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:41,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:52:41,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:41,245 INFO L85 PathProgramCache]: Analyzing trace with hash -58511443, now seen corresponding path program 1 times [2022-07-22 20:52:41,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:41,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166589153] [2022-07-22 20:52:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:41,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:41,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166589153] [2022-07-22 20:52:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166589153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:41,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:52:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675045444] [2022-07-22 20:52:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:52:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:52:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:52:41,353 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:42,945 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2022-07-22 20:52:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:52:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:42,953 INFO L225 Difference]: With dead ends: 1027 [2022-07-22 20:52:42,953 INFO L226 Difference]: Without dead ends: 759 [2022-07-22 20:52:42,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:52:42,955 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:42,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1254 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 20:52:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-07-22 20:52:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2022-07-22 20:52:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2022-07-22 20:52:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2022-07-22 20:52:42,998 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2022-07-22 20:52:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2022-07-22 20:52:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2022-07-22 20:52:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:43,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:43,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:52:43,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1420513879, now seen corresponding path program 1 times [2022-07-22 20:52:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838278727] [2022-07-22 20:52:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:43,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838278727] [2022-07-22 20:52:43,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838278727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:43,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:43,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636870593] [2022-07-22 20:52:43,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:43,132 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:44,979 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2022-07-22 20:52:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:52:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:44,984 INFO L225 Difference]: With dead ends: 1690 [2022-07-22 20:52:44,984 INFO L226 Difference]: Without dead ends: 1145 [2022-07-22 20:52:44,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:52:44,986 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:44,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 2193 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 20:52:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-22 20:52:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2022-07-22 20:52:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2022-07-22 20:52:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2022-07-22 20:52:45,034 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2022-07-22 20:52:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:45,034 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2022-07-22 20:52:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2022-07-22 20:52:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:45,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:45,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:45,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:52:45,036 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 508418347, now seen corresponding path program 1 times [2022-07-22 20:52:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:45,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552527538] [2022-07-22 20:52:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552527538] [2022-07-22 20:52:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552527538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:45,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:45,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257632831] [2022-07-22 20:52:45,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:45,169 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:47,175 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2022-07-22 20:52:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:52:47,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:47,184 INFO L225 Difference]: With dead ends: 2667 [2022-07-22 20:52:47,184 INFO L226 Difference]: Without dead ends: 1864 [2022-07-22 20:52:47,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:52:47,187 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 1120 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:47,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 2183 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:52:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-07-22 20:52:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2022-07-22 20:52:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2022-07-22 20:52:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2022-07-22 20:52:47,272 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2022-07-22 20:52:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:47,273 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2022-07-22 20:52:47,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2022-07-22 20:52:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:47,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:47,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:52:47,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1784662679, now seen corresponding path program 1 times [2022-07-22 20:52:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108535857] [2022-07-22 20:52:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:47,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108535857] [2022-07-22 20:52:47,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108535857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:47,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:47,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561253614] [2022-07-22 20:52:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:47,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:47,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:47,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:47,390 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:49,488 INFO L93 Difference]: Finished difference Result 4545 states and 7201 transitions. [2022-07-22 20:52:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:52:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:49,502 INFO L225 Difference]: With dead ends: 4545 [2022-07-22 20:52:49,503 INFO L226 Difference]: Without dead ends: 3225 [2022-07-22 20:52:49,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:52:49,508 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 1115 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:49,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 2175 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:52:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2022-07-22 20:52:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2377. [2022-07-22 20:52:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5598885793871866) internal successors, (3360), 2164 states have internal predecessors, (3360), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-07-22 20:52:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3713 transitions. [2022-07-22 20:52:49,694 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3713 transitions. Word has length 135 [2022-07-22 20:52:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:49,695 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 3713 transitions. [2022-07-22 20:52:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3713 transitions. [2022-07-22 20:52:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:49,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:49,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:52:49,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1313306329, now seen corresponding path program 1 times [2022-07-22 20:52:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:49,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766135068] [2022-07-22 20:52:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:49,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766135068] [2022-07-22 20:52:49,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766135068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:49,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:49,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:49,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700612601] [2022-07-22 20:52:49,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:49,815 INFO L87 Difference]: Start difference. First operand 2377 states and 3713 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:51,014 INFO L93 Difference]: Finished difference Result 5598 states and 8878 transitions. [2022-07-22 20:52:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:52:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:51,028 INFO L225 Difference]: With dead ends: 5598 [2022-07-22 20:52:51,029 INFO L226 Difference]: Without dead ends: 3238 [2022-07-22 20:52:51,035 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:52:51,036 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 857 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:51,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1148 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:52:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2022-07-22 20:52:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2377. [2022-07-22 20:52:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5557103064066853) internal successors, (3351), 2164 states have internal predecessors, (3351), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-07-22 20:52:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3704 transitions. [2022-07-22 20:52:51,191 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3704 transitions. Word has length 135 [2022-07-22 20:52:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:51,191 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 3704 transitions. [2022-07-22 20:52:51,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3704 transitions. [2022-07-22 20:52:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:51,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:51,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:51,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:52:51,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1334298025, now seen corresponding path program 1 times [2022-07-22 20:52:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:51,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726727396] [2022-07-22 20:52:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726727396] [2022-07-22 20:52:51,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726727396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:51,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:51,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:51,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217949638] [2022-07-22 20:52:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:51,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:51,305 INFO L87 Difference]: Start difference. First operand 2377 states and 3704 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:52,438 INFO L93 Difference]: Finished difference Result 5588 states and 8831 transitions. [2022-07-22 20:52:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:52:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:52,451 INFO L225 Difference]: With dead ends: 5588 [2022-07-22 20:52:52,451 INFO L226 Difference]: Without dead ends: 3228 [2022-07-22 20:52:52,456 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:52:52,459 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 805 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:52,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1170 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:52:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-07-22 20:52:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2377. [2022-07-22 20:52:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.551532033426184) internal successors, (3342), 2164 states have internal predecessors, (3342), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-07-22 20:52:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3695 transitions. [2022-07-22 20:52:52,657 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3695 transitions. Word has length 135 [2022-07-22 20:52:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:52,658 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 3695 transitions. [2022-07-22 20:52:52,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3695 transitions. [2022-07-22 20:52:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:52,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:52,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:52,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:52:52,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:52,661 INFO L85 PathProgramCache]: Analyzing trace with hash -797052697, now seen corresponding path program 1 times [2022-07-22 20:52:52,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:52,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592691803] [2022-07-22 20:52:52,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:52,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:52,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592691803] [2022-07-22 20:52:52,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592691803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:52,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874440910] [2022-07-22 20:52:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:52,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:52,768 INFO L87 Difference]: Start difference. First operand 2377 states and 3695 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:53,700 INFO L93 Difference]: Finished difference Result 5578 states and 8784 transitions. [2022-07-22 20:52:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:52:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:53,714 INFO L225 Difference]: With dead ends: 5578 [2022-07-22 20:52:53,714 INFO L226 Difference]: Without dead ends: 3218 [2022-07-22 20:52:53,721 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:52:53,722 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 922 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:53,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1014 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:52:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2022-07-22 20:52:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2377. [2022-07-22 20:52:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5473537604456824) internal successors, (3333), 2164 states have internal predecessors, (3333), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-07-22 20:52:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3686 transitions. [2022-07-22 20:52:53,915 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3686 transitions. Word has length 135 [2022-07-22 20:52:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:53,915 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 3686 transitions. [2022-07-22 20:52:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3686 transitions. [2022-07-22 20:52:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:53,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:53,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:53,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:52:53,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1835637271, now seen corresponding path program 1 times [2022-07-22 20:52:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:53,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797158152] [2022-07-22 20:52:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:53,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:54,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:54,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797158152] [2022-07-22 20:52:54,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797158152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:54,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:54,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358709886] [2022-07-22 20:52:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:54,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:54,040 INFO L87 Difference]: Start difference. First operand 2377 states and 3686 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:56,098 INFO L93 Difference]: Finished difference Result 8281 states and 12965 transitions. [2022-07-22 20:52:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:52:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:56,123 INFO L225 Difference]: With dead ends: 8281 [2022-07-22 20:52:56,123 INFO L226 Difference]: Without dead ends: 5921 [2022-07-22 20:52:56,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:52:56,130 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 1093 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:56,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 2152 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 20:52:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2022-07-22 20:52:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 4489. [2022-07-22 20:52:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4074 states have (on average 1.5417280314187531) internal successors, (6281), 4092 states have internal predecessors, (6281), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-07-22 20:52:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6968 transitions. [2022-07-22 20:52:56,448 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6968 transitions. Word has length 135 [2022-07-22 20:52:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:52:56,448 INFO L495 AbstractCegarLoop]: Abstraction has 4489 states and 6968 transitions. [2022-07-22 20:52:56,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6968 transitions. [2022-07-22 20:52:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:52:56,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:52:56,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:52:56,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:52:56,453 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:52:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:52:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash 486164647, now seen corresponding path program 1 times [2022-07-22 20:52:56,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:52:56,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553602693] [2022-07-22 20:52:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:52:56,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:52:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:52:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:52:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:52:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:52:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:52:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:52:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:52:56,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:52:56,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553602693] [2022-07-22 20:52:56,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553602693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:52:56,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:52:56,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:52:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722841592] [2022-07-22 20:52:56,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:52:56,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:52:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:52:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:52:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:52:56,563 INFO L87 Difference]: Start difference. First operand 4489 states and 6968 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:52:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:52:59,613 INFO L93 Difference]: Finished difference Result 17751 states and 27743 transitions. [2022-07-22 20:52:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:52:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:52:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:52:59,663 INFO L225 Difference]: With dead ends: 17751 [2022-07-22 20:52:59,664 INFO L226 Difference]: Without dead ends: 13279 [2022-07-22 20:52:59,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:52:59,677 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 1175 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:52:59,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 2273 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 20:52:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2022-07-22 20:53:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 8674. [2022-07-22 20:53:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 7891 states have (on average 1.540362438220758) internal successors, (12155), 7925 states have internal predecessors, (12155), 552 states have call successors, (552), 199 states have call predecessors, (552), 230 states have return successors, (825), 581 states have call predecessors, (825), 550 states have call successors, (825) [2022-07-22 20:53:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 13532 transitions. [2022-07-22 20:53:00,397 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 13532 transitions. Word has length 135 [2022-07-22 20:53:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:00,397 INFO L495 AbstractCegarLoop]: Abstraction has 8674 states and 13532 transitions. [2022-07-22 20:53:00,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 13532 transitions. [2022-07-22 20:53:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:53:00,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:00,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:00,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:53:00,405 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1655695831, now seen corresponding path program 1 times [2022-07-22 20:53:00,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:00,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756715802] [2022-07-22 20:53:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:53:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:53:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:53:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:00,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:00,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756715802] [2022-07-22 20:53:00,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756715802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:00,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:00,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:00,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749852048] [2022-07-22 20:53:00,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:00,508 INFO L87 Difference]: Start difference. First operand 8674 states and 13532 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:04,389 INFO L93 Difference]: Finished difference Result 34222 states and 53733 transitions. [2022-07-22 20:53:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:53:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:53:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:04,487 INFO L225 Difference]: With dead ends: 34222 [2022-07-22 20:53:04,487 INFO L226 Difference]: Without dead ends: 25565 [2022-07-22 20:53:04,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:04,519 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1384 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:04,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1408 Valid, 2126 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:53:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25565 states. [2022-07-22 20:53:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25565 to 16707. [2022-07-22 20:53:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16707 states, 15204 states have (on average 1.5351881083925283) internal successors, (23341), 15270 states have internal predecessors, (23341), 1048 states have call successors, (1048), 391 states have call predecessors, (1048), 454 states have return successors, (1839), 1109 states have call predecessors, (1839), 1046 states have call successors, (1839) [2022-07-22 20:53:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16707 states to 16707 states and 26228 transitions. [2022-07-22 20:53:05,730 INFO L78 Accepts]: Start accepts. Automaton has 16707 states and 26228 transitions. Word has length 135 [2022-07-22 20:53:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:05,730 INFO L495 AbstractCegarLoop]: Abstraction has 16707 states and 26228 transitions. [2022-07-22 20:53:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 16707 states and 26228 transitions. [2022-07-22 20:53:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:53:05,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:05,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:53:05,741 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2015989863, now seen corresponding path program 1 times [2022-07-22 20:53:05,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:05,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679243270] [2022-07-22 20:53:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:53:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:53:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:53:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:05,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:05,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679243270] [2022-07-22 20:53:05,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679243270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:05,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236895227] [2022-07-22 20:53:05,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:05,838 INFO L87 Difference]: Start difference. First operand 16707 states and 26228 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:11,774 INFO L93 Difference]: Finished difference Result 64651 states and 102247 transitions. [2022-07-22 20:53:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:53:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:53:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:11,945 INFO L225 Difference]: With dead ends: 64651 [2022-07-22 20:53:11,945 INFO L226 Difference]: Without dead ends: 47961 [2022-07-22 20:53:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:12,009 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 1302 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:12,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 2121 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:53:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47961 states. [2022-07-22 20:53:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47961 to 33125. [2022-07-22 20:53:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33125 states, 30214 states have (on average 1.5373336863705567) internal successors, (46449), 30344 states have internal predecessors, (46449), 2008 states have call successors, (2008), 775 states have call predecessors, (2008), 902 states have return successors, (4321), 2133 states have call predecessors, (4321), 2006 states have call successors, (4321) [2022-07-22 20:53:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33125 states to 33125 states and 52778 transitions. [2022-07-22 20:53:14,796 INFO L78 Accepts]: Start accepts. Automaton has 33125 states and 52778 transitions. Word has length 135 [2022-07-22 20:53:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:14,796 INFO L495 AbstractCegarLoop]: Abstraction has 33125 states and 52778 transitions. [2022-07-22 20:53:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33125 states and 52778 transitions. [2022-07-22 20:53:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:53:14,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:14,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:53:14,818 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -889683419, now seen corresponding path program 1 times [2022-07-22 20:53:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:14,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632401775] [2022-07-22 20:53:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:53:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:53:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:53:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632401775] [2022-07-22 20:53:14,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632401775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:14,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:14,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:14,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386265240] [2022-07-22 20:53:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:14,948 INFO L87 Difference]: Start difference. First operand 33125 states and 52778 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:25,070 INFO L93 Difference]: Finished difference Result 126251 states and 202543 transitions. [2022-07-22 20:53:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:53:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:53:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:25,410 INFO L225 Difference]: With dead ends: 126251 [2022-07-22 20:53:25,411 INFO L226 Difference]: Without dead ends: 93143 [2022-07-22 20:53:25,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:25,515 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 1325 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:25,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 1464 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 20:53:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93143 states. [2022-07-22 20:53:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93143 to 65894. [2022-07-22 20:53:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65894 states, 60231 states have (on average 1.5394564260928758) internal successors, (92723), 60489 states have internal predecessors, (92723), 3864 states have call successors, (3864), 1543 states have call predecessors, (3864), 1798 states have return successors, (10679), 4117 states have call predecessors, (10679), 3862 states have call successors, (10679) [2022-07-22 20:53:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65894 states to 65894 states and 107266 transitions. [2022-07-22 20:53:30,928 INFO L78 Accepts]: Start accepts. Automaton has 65894 states and 107266 transitions. Word has length 135 [2022-07-22 20:53:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:30,928 INFO L495 AbstractCegarLoop]: Abstraction has 65894 states and 107266 transitions. [2022-07-22 20:53:30,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 65894 states and 107266 transitions. [2022-07-22 20:53:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:53:30,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:30,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:53:30,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1371889831, now seen corresponding path program 1 times [2022-07-22 20:53:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417360329] [2022-07-22 20:53:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:53:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:53:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:53:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417360329] [2022-07-22 20:53:31,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417360329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:31,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:31,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721778414] [2022-07-22 20:53:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:31,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:31,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:31,079 INFO L87 Difference]: Start difference. First operand 65894 states and 107266 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:39,232 INFO L93 Difference]: Finished difference Result 150414 states and 250103 transitions. [2022-07-22 20:53:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-22 20:53:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:39,494 INFO L225 Difference]: With dead ends: 150414 [2022-07-22 20:53:39,494 INFO L226 Difference]: Without dead ends: 84537 [2022-07-22 20:53:39,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:39,779 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 924 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:39,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 989 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:53:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84537 states. [2022-07-22 20:53:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84537 to 65894. [2022-07-22 20:53:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65894 states, 60231 states have (on average 1.5351895203466654) internal successors, (92466), 60489 states have internal predecessors, (92466), 3864 states have call successors, (3864), 1543 states have call predecessors, (3864), 1798 states have return successors, (10679), 4117 states have call predecessors, (10679), 3862 states have call successors, (10679) [2022-07-22 20:53:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65894 states to 65894 states and 107009 transitions. [2022-07-22 20:53:45,224 INFO L78 Accepts]: Start accepts. Automaton has 65894 states and 107009 transitions. Word has length 135 [2022-07-22 20:53:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:45,225 INFO L495 AbstractCegarLoop]: Abstraction has 65894 states and 107009 transitions. [2022-07-22 20:53:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:53:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 65894 states and 107009 transitions. [2022-07-22 20:53:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 20:53:45,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:45,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:45,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:53:45,264 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -494818843, now seen corresponding path program 1 times [2022-07-22 20:53:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:45,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743164662] [2022-07-22 20:53:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 20:53:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:53:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 20:53:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743164662] [2022-07-22 20:53:45,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743164662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:45,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:45,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510240408] [2022-07-22 20:53:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:45,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:45,367 INFO L87 Difference]: Start difference. First operand 65894 states and 107009 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)