./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:30:34,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:30:34,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:30:34,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:30:34,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:30:34,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:30:34,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:30:34,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:30:34,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:30:34,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:30:34,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:30:34,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:30:34,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:30:34,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:30:34,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:30:34,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:30:34,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:30:34,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:30:34,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:30:34,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:30:34,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:30:34,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:30:34,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:30:34,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:30:34,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:30:34,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:30:34,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:30:34,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:30:34,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:30:34,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:30:34,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:30:34,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:30:34,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:30:34,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:30:34,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:30:34,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:30:34,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:30:34,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:30:34,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:30:34,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:30:34,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:30:34,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:30:35,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:30:35,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:30:35,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:30:35,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:30:35,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:30:35,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:30:35,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:30:35,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:30:35,018 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:30:35,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:30:35,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:30:35,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:30:35,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:30:35,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:30:35,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:30:35,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:30:35,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:30:35,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:30:35,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:30:35,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:30:35,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:30:35,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:30:35,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:30:35,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2021-12-16 02:30:35,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:30:35,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:30:35,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:30:35,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:30:35,304 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:30:35,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-16 02:30:35,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5150e78ab/2c47fbefd346420fb5513987a66b4d90/FLAG779260b0e [2021-12-16 02:30:35,768 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:30:35,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-16 02:30:35,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5150e78ab/2c47fbefd346420fb5513987a66b4d90/FLAG779260b0e [2021-12-16 02:30:36,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5150e78ab/2c47fbefd346420fb5513987a66b4d90 [2021-12-16 02:30:36,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:30:36,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:30:36,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:30:36,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:30:36,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:30:36,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e262fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36, skipping insertion in model container [2021-12-16 02:30:36,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:30:36,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:30:36,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2021-12-16 02:30:36,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2021-12-16 02:30:36,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:30:36,442 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:30:36,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2021-12-16 02:30:36,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2021-12-16 02:30:36,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:30:36,520 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:30:36,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36 WrapperNode [2021-12-16 02:30:36,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:30:36,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:30:36,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:30:36,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:30:36,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,594 INFO L137 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1002 [2021-12-16 02:30:36,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:30:36,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:30:36,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:30:36,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:30:36,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:30:36,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:30:36,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:30:36,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:30:36,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (1/1) ... [2021-12-16 02:30:36,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:30:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:36,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:30:36,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:30:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:30:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 02:30:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 02:30:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-16 02:30:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-16 02:30:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-16 02:30:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-16 02:30:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-16 02:30:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-16 02:30:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-16 02:30:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-16 02:30:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-16 02:30:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-16 02:30:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-16 02:30:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-16 02:30:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:30:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-16 02:30:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-16 02:30:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-16 02:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-16 02:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-16 02:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-16 02:30:36,921 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:30:36,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:30:37,668 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:30:37,683 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:30:37,684 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-16 02:30:37,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:30:37 BoogieIcfgContainer [2021-12-16 02:30:37,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:30:37,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:30:37,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:30:37,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:30:37,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:30:36" (1/3) ... [2021-12-16 02:30:37,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bc41fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:30:37, skipping insertion in model container [2021-12-16 02:30:37,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:30:36" (2/3) ... [2021-12-16 02:30:37,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bc41fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:30:37, skipping insertion in model container [2021-12-16 02:30:37,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:30:37" (3/3) ... [2021-12-16 02:30:37,697 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-16 02:30:37,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:30:37,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:30:37,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:30:37,744 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:30:37,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:30:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-16 02:30:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 02:30:37,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:37,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:37,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1248240687, now seen corresponding path program 1 times [2021-12-16 02:30:37,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642332109] [2021-12-16 02:30:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:37,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 02:30:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:38,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642332109] [2021-12-16 02:30:38,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642332109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:38,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:38,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:30:38,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927531797] [2021-12-16 02:30:38,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:38,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:30:38,075 INFO L87 Difference]: Start difference. First operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:38,355 INFO L93 Difference]: Finished difference Result 919 states and 1492 transitions. [2021-12-16 02:30:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:30:38,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-16 02:30:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:38,377 INFO L225 Difference]: With dead ends: 919 [2021-12-16 02:30:38,378 INFO L226 Difference]: Without dead ends: 496 [2021-12-16 02:30:38,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:38,390 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 897 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:38,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1082 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:30:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-16 02:30:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 490. [2021-12-16 02:30:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 440 states have (on average 1.5318181818181817) internal successors, (674), 445 states have internal predecessors, (674), 37 states have call successors, (37), 12 states have call predecessors, (37), 11 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-16 02:30:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 750 transitions. [2021-12-16 02:30:38,469 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 750 transitions. Word has length 44 [2021-12-16 02:30:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:38,470 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 750 transitions. [2021-12-16 02:30:38,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 750 transitions. [2021-12-16 02:30:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 02:30:38,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:38,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:38,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:30:38,473 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1131267963, now seen corresponding path program 1 times [2021-12-16 02:30:38,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:38,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082708186] [2021-12-16 02:30:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:38,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 02:30:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:38,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082708186] [2021-12-16 02:30:38,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082708186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:38,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:38,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:30:38,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140581869] [2021-12-16 02:30:38,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:38,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:38,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:30:38,559 INFO L87 Difference]: Start difference. First operand 490 states and 750 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:38,911 INFO L93 Difference]: Finished difference Result 738 states and 1090 transitions. [2021-12-16 02:30:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:30:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-16 02:30:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:38,916 INFO L225 Difference]: With dead ends: 738 [2021-12-16 02:30:38,916 INFO L226 Difference]: Without dead ends: 614 [2021-12-16 02:30:38,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:38,918 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 349 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:38,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1427 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:30:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-16 02:30:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 557. [2021-12-16 02:30:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 501 states have (on average 1.5129740518962076) internal successors, (758), 506 states have internal predecessors, (758), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-12-16 02:30:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 840 transitions. [2021-12-16 02:30:38,955 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 840 transitions. Word has length 45 [2021-12-16 02:30:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 840 transitions. [2021-12-16 02:30:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 840 transitions. [2021-12-16 02:30:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 02:30:38,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:38,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:38,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:30:38,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1879341872, now seen corresponding path program 1 times [2021-12-16 02:30:38,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742236197] [2021-12-16 02:30:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:38,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 02:30:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:39,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742236197] [2021-12-16 02:30:39,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742236197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:39,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:39,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:30:39,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571613805] [2021-12-16 02:30:39,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:39,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:39,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:30:39,031 INFO L87 Difference]: Start difference. First operand 557 states and 840 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:39,182 INFO L93 Difference]: Finished difference Result 965 states and 1399 transitions. [2021-12-16 02:30:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:30:39,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-16 02:30:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:39,186 INFO L225 Difference]: With dead ends: 965 [2021-12-16 02:30:39,186 INFO L226 Difference]: Without dead ends: 774 [2021-12-16 02:30:39,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:39,188 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 906 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:39,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1085 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:30:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-16 02:30:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 722. [2021-12-16 02:30:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 647 states have (on average 1.465224111282844) internal successors, (948), 655 states have internal predecessors, (948), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (59), 45 states have call predecessors, (59), 47 states have call successors, (59) [2021-12-16 02:30:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1058 transitions. [2021-12-16 02:30:39,226 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1058 transitions. Word has length 45 [2021-12-16 02:30:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1058 transitions. [2021-12-16 02:30:39,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:30:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1058 transitions. [2021-12-16 02:30:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 02:30:39,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:39,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:39,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:30:39,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2075143713, now seen corresponding path program 1 times [2021-12-16 02:30:39,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996774218] [2021-12-16 02:30:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:39,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 02:30:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 02:30:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:30:39,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996774218] [2021-12-16 02:30:39,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996774218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:39,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:30:39,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099147470] [2021-12-16 02:30:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:39,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:39,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:30:39,353 INFO L87 Difference]: Start difference. First operand 722 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:30:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:39,692 INFO L93 Difference]: Finished difference Result 1306 states and 1843 transitions. [2021-12-16 02:30:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:30:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-16 02:30:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:39,696 INFO L225 Difference]: With dead ends: 1306 [2021-12-16 02:30:39,696 INFO L226 Difference]: Without dead ends: 950 [2021-12-16 02:30:39,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:39,698 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 333 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:39,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1455 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:30:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-12-16 02:30:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 912. [2021-12-16 02:30:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 813 states have (on average 1.4120541205412054) internal successors, (1148), 823 states have internal predecessors, (1148), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (83), 59 states have call predecessors, (83), 61 states have call successors, (83) [2021-12-16 02:30:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1296 transitions. [2021-12-16 02:30:39,729 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1296 transitions. Word has length 62 [2021-12-16 02:30:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:39,730 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1296 transitions. [2021-12-16 02:30:39,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:30:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1296 transitions. [2021-12-16 02:30:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:30:39,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:39,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:39,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:30:39,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1252852542, now seen corresponding path program 1 times [2021-12-16 02:30:39,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:39,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813381729] [2021-12-16 02:30:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:39,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:30:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 02:30:39,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813381729] [2021-12-16 02:30:39,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813381729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:39,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:39,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:30:39,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262975999] [2021-12-16 02:30:39,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:39,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:39,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:30:39,772 INFO L87 Difference]: Start difference. First operand 912 states and 1296 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:30:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:39,922 INFO L93 Difference]: Finished difference Result 1565 states and 2149 transitions. [2021-12-16 02:30:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:30:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-16 02:30:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:39,927 INFO L225 Difference]: With dead ends: 1565 [2021-12-16 02:30:39,927 INFO L226 Difference]: Without dead ends: 1111 [2021-12-16 02:30:39,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:39,930 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 893 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:39,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1082 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:30:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-12-16 02:30:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1056. [2021-12-16 02:30:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 941 states have (on average 1.3804463336875665) internal successors, (1299), 953 states have internal predecessors, (1299), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2021-12-16 02:30:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1469 transitions. [2021-12-16 02:30:39,973 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1469 transitions. Word has length 67 [2021-12-16 02:30:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:39,973 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1469 transitions. [2021-12-16 02:30:39,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:30:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1469 transitions. [2021-12-16 02:30:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:30:39,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:39,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:30:39,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1281985013, now seen corresponding path program 1 times [2021-12-16 02:30:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819154012] [2021-12-16 02:30:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:39,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:30:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:30:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 02:30:40,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819154012] [2021-12-16 02:30:40,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819154012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:40,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302153735] [2021-12-16 02:30:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:40,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:40,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:30:40,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:30:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:30:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:30:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:30:40,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:30:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302153735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:40,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:30:40,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:30:40,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763639257] [2021-12-16 02:30:40,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:40,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:30:40,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:30:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:40,316 INFO L87 Difference]: Start difference. First operand 1056 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:30:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:40,382 INFO L93 Difference]: Finished difference Result 1599 states and 2192 transitions. [2021-12-16 02:30:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:30:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-16 02:30:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:40,407 INFO L225 Difference]: With dead ends: 1599 [2021-12-16 02:30:40,407 INFO L226 Difference]: Without dead ends: 1054 [2021-12-16 02:30:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:40,409 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 72 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:40,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1340 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:30:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-16 02:30:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1010. [2021-12-16 02:30:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 901 states have (on average 1.3695893451720311) internal successors, (1234), 913 states have internal predecessors, (1234), 69 states have call successors, (69), 34 states have call predecessors, (69), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-16 02:30:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1394 transitions. [2021-12-16 02:30:40,452 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1394 transitions. Word has length 68 [2021-12-16 02:30:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:40,454 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1394 transitions. [2021-12-16 02:30:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:30:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1394 transitions. [2021-12-16 02:30:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:30:40,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:40,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:40,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:30:40,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 02:30:40,669 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash 897986762, now seen corresponding path program 1 times [2021-12-16 02:30:40,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:40,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729514913] [2021-12-16 02:30:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:40,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:30:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:30:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:30:40,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:40,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729514913] [2021-12-16 02:30:40,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729514913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886557888] [2021-12-16 02:30:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:40,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:40,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:30:40,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:30:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:30:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:30:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:40,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:30:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:30:41,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886557888] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:41,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:30:41,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-16 02:30:41,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903910486] [2021-12-16 02:30:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:41,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:30:41,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:30:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:30:41,118 INFO L87 Difference]: Start difference. First operand 1010 states and 1394 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:30:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:41,277 INFO L93 Difference]: Finished difference Result 1062 states and 1456 transitions. [2021-12-16 02:30:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 02:30:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-16 02:30:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:41,281 INFO L225 Difference]: With dead ends: 1062 [2021-12-16 02:30:41,282 INFO L226 Difference]: Without dead ends: 1059 [2021-12-16 02:30:41,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:30:41,283 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 1197 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:41,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 746 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:30:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-16 02:30:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1009. [2021-12-16 02:30:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 901 states have (on average 1.367369589345172) internal successors, (1232), 912 states have internal predecessors, (1232), 68 states have call successors, (68), 34 states have call predecessors, (68), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-16 02:30:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1391 transitions. [2021-12-16 02:30:41,315 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1391 transitions. Word has length 68 [2021-12-16 02:30:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:41,315 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1391 transitions. [2021-12-16 02:30:41,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:30:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1391 transitions. [2021-12-16 02:30:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:30:41,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:41,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:41,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:30:41,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 02:30:41,531 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2066438309, now seen corresponding path program 1 times [2021-12-16 02:30:41,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:41,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274299742] [2021-12-16 02:30:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:41,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:41,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:30:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:30:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:30:41,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274299742] [2021-12-16 02:30:41,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274299742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265903295] [2021-12-16 02:30:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:41,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:41,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:30:41,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:30:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:30:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:30:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:41,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:30:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:30:42,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265903295] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:30:42,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:30:42,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-16 02:30:42,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511874289] [2021-12-16 02:30:42,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:30:42,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 02:30:42,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 02:30:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:30:42,038 INFO L87 Difference]: Start difference. First operand 1009 states and 1391 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 02:30:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:43,176 INFO L93 Difference]: Finished difference Result 2519 states and 3329 transitions. [2021-12-16 02:30:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 02:30:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-16 02:30:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:43,183 INFO L225 Difference]: With dead ends: 2519 [2021-12-16 02:30:43,183 INFO L226 Difference]: Without dead ends: 2023 [2021-12-16 02:30:43,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 02:30:43,185 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 1813 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:43,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1845 Valid, 3683 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:30:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-16 02:30:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1388. [2021-12-16 02:30:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1241 states have (on average 1.3247381144238517) internal successors, (1644), 1260 states have internal predecessors, (1644), 88 states have call successors, (88), 48 states have call predecessors, (88), 57 states have return successors, (125), 80 states have call predecessors, (125), 85 states have call successors, (125) [2021-12-16 02:30:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1857 transitions. [2021-12-16 02:30:43,229 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1857 transitions. Word has length 69 [2021-12-16 02:30:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1857 transitions. [2021-12-16 02:30:43,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 02:30:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1857 transitions. [2021-12-16 02:30:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 02:30:43,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:43,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:43,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:30:43,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:43,450 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1048564289, now seen corresponding path program 1 times [2021-12-16 02:30:43,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:43,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242031623] [2021-12-16 02:30:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:43,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:30:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 02:30:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 02:30:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 02:30:43,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242031623] [2021-12-16 02:30:43,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242031623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085761021] [2021-12-16 02:30:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:43,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:43,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:30:43,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:30:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:30:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:30:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:30:43,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:30:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085761021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:43,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:30:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:30:43,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355557875] [2021-12-16 02:30:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:30:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:30:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:43,800 INFO L87 Difference]: Start difference. First operand 1388 states and 1857 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 02:30:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:43,859 INFO L93 Difference]: Finished difference Result 2079 states and 2732 transitions. [2021-12-16 02:30:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:30:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-16 02:30:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:43,865 INFO L225 Difference]: With dead ends: 2079 [2021-12-16 02:30:43,866 INFO L226 Difference]: Without dead ends: 1310 [2021-12-16 02:30:43,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:43,868 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 617 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:43,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 761 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:30:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-16 02:30:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1301. [2021-12-16 02:30:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1164 states have (on average 1.3230240549828178) internal successors, (1540), 1182 states have internal predecessors, (1540), 84 states have call successors, (84), 44 states have call predecessors, (84), 51 states have return successors, (117), 75 states have call predecessors, (117), 81 states have call successors, (117) [2021-12-16 02:30:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1741 transitions. [2021-12-16 02:30:43,913 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1741 transitions. Word has length 88 [2021-12-16 02:30:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:43,913 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1741 transitions. [2021-12-16 02:30:43,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 02:30:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1741 transitions. [2021-12-16 02:30:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 02:30:43,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:43,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:43,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:30:44,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:44,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash -55924099, now seen corresponding path program 1 times [2021-12-16 02:30:44,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:44,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371528421] [2021-12-16 02:30:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:44,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:30:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:30:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 02:30:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 02:30:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 02:30:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 02:30:44,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371528421] [2021-12-16 02:30:44,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371528421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:30:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539872687] [2021-12-16 02:30:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:44,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:30:44,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:30:44,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:30:44,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:30:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:30:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:30:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 02:30:44,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:30:44,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539872687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:44,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:30:44,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:30:44,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560377325] [2021-12-16 02:30:44,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:44,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:30:44,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:30:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:44,490 INFO L87 Difference]: Start difference. First operand 1301 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 02:30:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:44,527 INFO L93 Difference]: Finished difference Result 1678 states and 2202 transitions. [2021-12-16 02:30:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:30:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-16 02:30:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:44,530 INFO L225 Difference]: With dead ends: 1678 [2021-12-16 02:30:44,530 INFO L226 Difference]: Without dead ends: 360 [2021-12-16 02:30:44,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:44,533 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 61 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:44,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1335 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:30:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-16 02:30:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-16 02:30:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5797546012269938) internal successors, (515), 328 states have internal predecessors, (515), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 02:30:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 567 transitions. [2021-12-16 02:30:44,548 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 567 transitions. Word has length 103 [2021-12-16 02:30:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 567 transitions. [2021-12-16 02:30:44,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 02:30:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 567 transitions. [2021-12-16 02:30:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:44,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:44,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:44,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:30:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 02:30:44,780 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1801318745, now seen corresponding path program 1 times [2021-12-16 02:30:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:44,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907282714] [2021-12-16 02:30:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:44,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:44,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907282714] [2021-12-16 02:30:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907282714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:44,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:44,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:30:44,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730192986] [2021-12-16 02:30:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:44,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:30:44,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:30:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:44,916 INFO L87 Difference]: Start difference. First operand 360 states and 567 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:46,080 INFO L93 Difference]: Finished difference Result 841 states and 1345 transitions. [2021-12-16 02:30:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:30:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:46,083 INFO L225 Difference]: With dead ends: 841 [2021-12-16 02:30:46,083 INFO L226 Difference]: Without dead ends: 491 [2021-12-16 02:30:46,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:30:46,085 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 966 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:46,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1026 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:30:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-16 02:30:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-16 02:30:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5766871165644172) internal successors, (514), 328 states have internal predecessors, (514), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 02:30:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 566 transitions. [2021-12-16 02:30:46,106 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 566 transitions. Word has length 168 [2021-12-16 02:30:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:46,106 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 566 transitions. [2021-12-16 02:30:46,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 566 transitions. [2021-12-16 02:30:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:46,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:46,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:46,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:30:46,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2146146907, now seen corresponding path program 1 times [2021-12-16 02:30:46,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:46,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113014514] [2021-12-16 02:30:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:46,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:46,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113014514] [2021-12-16 02:30:46,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113014514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:46,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:46,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:30:46,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596927515] [2021-12-16 02:30:46,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:46,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:30:46,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:30:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:30:46,216 INFO L87 Difference]: Start difference. First operand 360 states and 566 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:47,155 INFO L93 Difference]: Finished difference Result 833 states and 1328 transitions. [2021-12-16 02:30:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:30:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:47,157 INFO L225 Difference]: With dead ends: 833 [2021-12-16 02:30:47,157 INFO L226 Difference]: Without dead ends: 491 [2021-12-16 02:30:47,158 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:30:47,159 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 957 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:47,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1024 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:30:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-16 02:30:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-16 02:30:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5736196319018405) internal successors, (513), 328 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 02:30:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 565 transitions. [2021-12-16 02:30:47,184 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 565 transitions. Word has length 168 [2021-12-16 02:30:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:47,184 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 565 transitions. [2021-12-16 02:30:47,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 565 transitions. [2021-12-16 02:30:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:47,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:47,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:47,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:30:47,186 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1762957987, now seen corresponding path program 1 times [2021-12-16 02:30:47,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:47,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37051145] [2021-12-16 02:30:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:47,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:47,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:47,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37051145] [2021-12-16 02:30:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37051145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:47,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:30:47,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488935431] [2021-12-16 02:30:47,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:47,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:30:47,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:30:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:30:47,288 INFO L87 Difference]: Start difference. First operand 360 states and 565 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:49,307 INFO L93 Difference]: Finished difference Result 1318 states and 2116 transitions. [2021-12-16 02:30:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:30:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:49,312 INFO L225 Difference]: With dead ends: 1318 [2021-12-16 02:30:49,312 INFO L226 Difference]: Without dead ends: 978 [2021-12-16 02:30:49,313 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:30:49,314 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1456 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:49,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 1647 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 02:30:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-16 02:30:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 715. [2021-12-16 02:30:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 654 states have (on average 1.5871559633027523) internal successors, (1038), 657 states have internal predecessors, (1038), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-16 02:30:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1133 transitions. [2021-12-16 02:30:49,351 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1133 transitions. Word has length 168 [2021-12-16 02:30:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:49,351 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1133 transitions. [2021-12-16 02:30:49,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1133 transitions. [2021-12-16 02:30:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:49,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:49,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:49,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:30:49,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1609608801, now seen corresponding path program 1 times [2021-12-16 02:30:49,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:49,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260135700] [2021-12-16 02:30:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:49,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:49,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:49,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260135700] [2021-12-16 02:30:49,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260135700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:49,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:49,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:30:49,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622051192] [2021-12-16 02:30:49,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:49,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:30:49,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:30:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:49,468 INFO L87 Difference]: Start difference. First operand 715 states and 1133 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:52,167 INFO L93 Difference]: Finished difference Result 2178 states and 3507 transitions. [2021-12-16 02:30:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:30:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:52,173 INFO L225 Difference]: With dead ends: 2178 [2021-12-16 02:30:52,173 INFO L226 Difference]: Without dead ends: 1483 [2021-12-16 02:30:52,174 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:30:52,176 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 1483 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:52,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 2847 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 02:30:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-12-16 02:30:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1046. [2021-12-16 02:30:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.581419624217119) internal successors, (1515), 962 states have internal predecessors, (1515), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-16 02:30:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1652 transitions. [2021-12-16 02:30:52,219 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1652 transitions. Word has length 168 [2021-12-16 02:30:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:52,220 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1652 transitions. [2021-12-16 02:30:52,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1652 transitions. [2021-12-16 02:30:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:52,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:52,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:52,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:30:52,221 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1271321251, now seen corresponding path program 1 times [2021-12-16 02:30:52,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364995786] [2021-12-16 02:30:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:52,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:52,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364995786] [2021-12-16 02:30:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364995786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:52,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:52,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:30:52,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481505403] [2021-12-16 02:30:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:52,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:30:52,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:30:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:52,348 INFO L87 Difference]: Start difference. First operand 1046 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:54,805 INFO L93 Difference]: Finished difference Result 3444 states and 5534 transitions. [2021-12-16 02:30:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:30:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:54,813 INFO L225 Difference]: With dead ends: 3444 [2021-12-16 02:30:54,813 INFO L226 Difference]: Without dead ends: 2418 [2021-12-16 02:30:54,815 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:30:54,816 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1479 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:54,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 2836 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2835 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:30:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-12-16 02:30:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1711. [2021-12-16 02:30:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1569 states have (on average 1.5768005098789037) internal successors, (2474), 1575 states have internal predecessors, (2474), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-16 02:30:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2699 transitions. [2021-12-16 02:30:54,897 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2699 transitions. Word has length 168 [2021-12-16 02:30:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:54,897 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2699 transitions. [2021-12-16 02:30:54,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2699 transitions. [2021-12-16 02:30:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:54,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:54,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:54,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:30:54,900 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -844766753, now seen corresponding path program 1 times [2021-12-16 02:30:54,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313700847] [2021-12-16 02:30:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:54,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:54,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:54,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313700847] [2021-12-16 02:30:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313700847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:55,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:55,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:30:55,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518292969] [2021-12-16 02:30:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:55,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:30:55,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:30:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:55,004 INFO L87 Difference]: Start difference. First operand 1711 states and 2699 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:30:57,496 INFO L93 Difference]: Finished difference Result 5887 states and 9425 transitions. [2021-12-16 02:30:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:30:57,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:30:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:30:57,514 INFO L225 Difference]: With dead ends: 5887 [2021-12-16 02:30:57,515 INFO L226 Difference]: Without dead ends: 4196 [2021-12-16 02:30:57,518 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:30:57,519 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 1575 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 02:30:57,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1938 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 02:30:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-12-16 02:30:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3044. [2021-12-16 02:30:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2794 states have (on average 1.5733715103793844) internal successors, (4396), 2804 states have internal predecessors, (4396), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-16 02:30:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4803 transitions. [2021-12-16 02:30:57,673 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4803 transitions. Word has length 168 [2021-12-16 02:30:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:30:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 4803 transitions. [2021-12-16 02:30:57,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:30:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4803 transitions. [2021-12-16 02:30:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:30:57,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:30:57,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:30:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:30:57,677 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:30:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:30:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1385196259, now seen corresponding path program 1 times [2021-12-16 02:30:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:30:57,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869923723] [2021-12-16 02:30:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:30:57,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:30:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:30:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:30:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:30:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:30:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:30:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:30:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:30:57,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:30:57,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869923723] [2021-12-16 02:30:57,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869923723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:30:57,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:30:57,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:30:57,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703099841] [2021-12-16 02:30:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:30:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:30:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:30:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:30:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:30:57,807 INFO L87 Difference]: Start difference. First operand 3044 states and 4803 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:00,568 INFO L93 Difference]: Finished difference Result 10774 states and 17227 transitions. [2021-12-16 02:31:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:31:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:00,595 INFO L225 Difference]: With dead ends: 10774 [2021-12-16 02:31:00,596 INFO L226 Difference]: Without dead ends: 7750 [2021-12-16 02:31:00,605 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:31:00,606 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1477 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2819 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:00,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 2826 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2819 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:31:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7750 states. [2021-12-16 02:31:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7750 to 5717. [2021-12-16 02:31:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5251 states have (on average 1.5711293087031042) internal successors, (8250), 5269 states have internal predecessors, (8250), 347 states have call successors, (347), 103 states have call predecessors, (347), 118 states have return successors, (442), 360 states have call predecessors, (442), 345 states have call successors, (442) [2021-12-16 02:31:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 9039 transitions. [2021-12-16 02:31:00,903 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 9039 transitions. Word has length 168 [2021-12-16 02:31:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:00,904 INFO L470 AbstractCegarLoop]: Abstraction has 5717 states and 9039 transitions. [2021-12-16 02:31:00,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 9039 transitions. [2021-12-16 02:31:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:31:00,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:00,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:00,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:31:00,908 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1541176801, now seen corresponding path program 1 times [2021-12-16 02:31:00,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:00,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675480033] [2021-12-16 02:31:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:00,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:00,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:00,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:00,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:00,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:31:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:01,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:31:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:01,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675480033] [2021-12-16 02:31:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675480033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:01,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:01,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:01,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349933992] [2021-12-16 02:31:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:01,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:01,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:01,006 INFO L87 Difference]: Start difference. First operand 5717 states and 9039 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:04,036 INFO L93 Difference]: Finished difference Result 20549 states and 32893 transitions. [2021-12-16 02:31:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:31:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:04,091 INFO L225 Difference]: With dead ends: 20549 [2021-12-16 02:31:04,091 INFO L226 Difference]: Without dead ends: 14852 [2021-12-16 02:31:04,110 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:31:04,110 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 1476 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2821 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:04,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2821 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:31:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14852 states. [2021-12-16 02:31:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14852 to 11078. [2021-12-16 02:31:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 10180 states have (on average 1.5697445972495088) internal successors, (15980), 10214 states have internal predecessors, (15980), 667 states have call successors, (667), 199 states have call predecessors, (667), 230 states have return successors, (940), 696 states have call predecessors, (940), 665 states have call successors, (940) [2021-12-16 02:31:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 17587 transitions. [2021-12-16 02:31:04,738 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 17587 transitions. Word has length 168 [2021-12-16 02:31:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:04,738 INFO L470 AbstractCegarLoop]: Abstraction has 11078 states and 17587 transitions. [2021-12-16 02:31:04,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 17587 transitions. [2021-12-16 02:31:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:31:04,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:04,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:31:04,751 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1130566435, now seen corresponding path program 1 times [2021-12-16 02:31:04,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466584293] [2021-12-16 02:31:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:04,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:31:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:31:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:04,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:04,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466584293] [2021-12-16 02:31:04,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466584293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:04,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882587016] [2021-12-16 02:31:04,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:04,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:04,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:04,894 INFO L87 Difference]: Start difference. First operand 11078 states and 17587 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:09,009 INFO L93 Difference]: Finished difference Result 40100 states and 64419 transitions. [2021-12-16 02:31:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:31:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:09,196 INFO L225 Difference]: With dead ends: 40100 [2021-12-16 02:31:09,196 INFO L226 Difference]: Without dead ends: 29042 [2021-12-16 02:31:09,235 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:31:09,236 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 1475 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2803 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 2816 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:09,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 2816 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2803 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 02:31:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29042 states. [2021-12-16 02:31:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29042 to 21831. [2021-12-16 02:31:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21831 states, 20069 states have (on average 1.5688873386815487) internal successors, (31486), 20135 states have internal predecessors, (31486), 1307 states have call successors, (1307), 391 states have call predecessors, (1307), 454 states have return successors, (2098), 1368 states have call predecessors, (2098), 1305 states have call successors, (2098) [2021-12-16 02:31:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21831 states to 21831 states and 34891 transitions. [2021-12-16 02:31:10,371 INFO L78 Accepts]: Start accepts. Automaton has 21831 states and 34891 transitions. Word has length 168 [2021-12-16 02:31:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:10,371 INFO L470 AbstractCegarLoop]: Abstraction has 21831 states and 34891 transitions. [2021-12-16 02:31:10,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21831 states and 34891 transitions. [2021-12-16 02:31:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:31:10,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:10,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:10,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:31:10,385 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1376531039, now seen corresponding path program 1 times [2021-12-16 02:31:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831498146] [2021-12-16 02:31:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:10,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:31:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:31:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:10,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831498146] [2021-12-16 02:31:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831498146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:10,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:10,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:10,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505623042] [2021-12-16 02:31:10,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:10,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:10,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:10,498 INFO L87 Difference]: Start difference. First operand 21831 states and 34891 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:16,084 INFO L93 Difference]: Finished difference Result 79203 states and 128073 transitions. [2021-12-16 02:31:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:31:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:16,313 INFO L225 Difference]: With dead ends: 79203 [2021-12-16 02:31:16,313 INFO L226 Difference]: Without dead ends: 57392 [2021-12-16 02:31:16,404 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:31:16,406 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 1477 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2792 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:16,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 2809 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2792 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 02:31:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57392 states. [2021-12-16 02:31:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57392 to 43400. [2021-12-16 02:31:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43400 states, 39910 states have (on average 1.5683287396642445) internal successors, (62592), 40040 states have internal predecessors, (62592), 2587 states have call successors, (2587), 775 states have call predecessors, (2587), 902 states have return successors, (4900), 2712 states have call predecessors, (4900), 2585 states have call successors, (4900) [2021-12-16 02:31:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43400 states to 43400 states and 70079 transitions. [2021-12-16 02:31:19,036 INFO L78 Accepts]: Start accepts. Automaton has 43400 states and 70079 transitions. Word has length 168 [2021-12-16 02:31:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:19,036 INFO L470 AbstractCegarLoop]: Abstraction has 43400 states and 70079 transitions. [2021-12-16 02:31:19,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43400 states and 70079 transitions. [2021-12-16 02:31:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:31:19,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:19,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:19,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:31:19,063 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -759352163, now seen corresponding path program 1 times [2021-12-16 02:31:19,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925163519] [2021-12-16 02:31:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:19,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:31:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:31:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:19,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925163519] [2021-12-16 02:31:19,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925163519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:19,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328463694] [2021-12-16 02:31:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:19,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:19,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:19,183 INFO L87 Difference]: Start difference. First operand 43400 states and 70079 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:29,087 INFO L93 Difference]: Finished difference Result 157280 states and 256971 transitions. [2021-12-16 02:31:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-16 02:31:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:29,717 INFO L225 Difference]: With dead ends: 157280 [2021-12-16 02:31:29,717 INFO L226 Difference]: Without dead ends: 113900 [2021-12-16 02:31:29,919 INFO L932 BasicCegarLoop]: 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 [2021-12-16 02:31:29,920 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1472 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2800 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:29,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 2800 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2774 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 02:31:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113900 states. [2021-12-16 02:31:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113900 to 86794. [2021-12-16 02:31:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86794 states, 79848 states have (on average 1.5686303977557359) internal successors, (125252), 80106 states have internal predecessors, (125252), 5147 states have call successors, (5147), 1543 states have call predecessors, (5147), 1798 states have return successors, (11962), 5400 states have call predecessors, (11962), 5145 states have call successors, (11962) [2021-12-16 02:31:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86794 states to 86794 states and 142361 transitions. [2021-12-16 02:31:35,335 INFO L78 Accepts]: Start accepts. Automaton has 86794 states and 142361 transitions. Word has length 168 [2021-12-16 02:31:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:35,335 INFO L470 AbstractCegarLoop]: Abstraction has 86794 states and 142361 transitions. [2021-12-16 02:31:35,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 86794 states and 142361 transitions. [2021-12-16 02:31:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 02:31:35,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:35,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:35,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:31:35,380 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash -341463461, now seen corresponding path program 1 times [2021-12-16 02:31:35,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560296120] [2021-12-16 02:31:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:35,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 02:31:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 02:31:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:35,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560296120] [2021-12-16 02:31:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560296120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:35,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:35,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:35,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270628269] [2021-12-16 02:31:35,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:35,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:35,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:35,472 INFO L87 Difference]: Start difference. First operand 86794 states and 142361 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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)