./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:31:53,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:31:53,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:31:53,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:31:53,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:31:53,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:31:53,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:31:53,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:31:53,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:31:53,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:31:53,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:31:53,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:31:53,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:31:53,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:31:53,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:31:53,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:31:53,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:31:53,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:31:53,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:31:53,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:31:53,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:31:53,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:31:53,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:31:53,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:31:53,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:31:53,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:31:53,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:31:53,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:31:53,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:31:53,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:31:53,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:31:53,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:31:53,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:31:53,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:31:53,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:31:53,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:31:53,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:31:53,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:31:53,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:31:53,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:31:53,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:31:53,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:31:53,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:31:53,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:31:53,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:31:53,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:31:53,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:31:53,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:31:53,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:31:53,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:31:53,878 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:31:53,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:31:53,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:31:53,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:31:53,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:31:53,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:31:53,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:31:53,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:31:53,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:31:53,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:31:53,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:31:53,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:31:53,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:31:53,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:31:53,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:31:53,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:31:53,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 [2021-12-22 12:31:54,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:31:54,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:31:54,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:31:54,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:31:54,092 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:31:54,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2021-12-22 12:31:54,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5205fbe58/a689eb2860eb4ef3aec39757184c193e/FLAGa2c32a828 [2021-12-22 12:31:54,924 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:31:54,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2021-12-22 12:31:54,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5205fbe58/a689eb2860eb4ef3aec39757184c193e/FLAGa2c32a828 [2021-12-22 12:31:55,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5205fbe58/a689eb2860eb4ef3aec39757184c193e [2021-12-22 12:31:55,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:31:55,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:31:55,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:31:55,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:31:55,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:31:55,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:31:55" (1/1) ... [2021-12-22 12:31:55,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765f8db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:55, skipping insertion in model container [2021-12-22 12:31:55,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:31:55" (1/1) ... [2021-12-22 12:31:55,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:31:55,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:31:56,795 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/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2021-12-22 12:31:56,825 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/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2021-12-22 12:31:56,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:31:56,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:31:57,533 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/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2021-12-22 12:31:57,539 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/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2021-12-22 12:31:57,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:31:57,599 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:31:57,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57 WrapperNode [2021-12-22 12:31:57,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:31:57,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:31:57,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:31:57,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:31:57,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:57,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:57,957 INFO L137 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2021-12-22 12:31:57,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:31:57,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:31:57,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:31:57,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:31:57,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:57,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:31:58,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:31:58,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:31:58,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:31:58,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (1/1) ... [2021-12-22 12:31:58,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:31:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:31:58,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 12:31:58,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 12:31:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:31:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-22 12:31:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-22 12:31:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:31:58,593 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:31:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:31:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:31:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:31:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:31:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:31:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:31:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:31:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:31:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:31:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:31:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:31:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:31:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:31:58,658 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:31:58,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:32:03,398 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:32:03,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:32:03,431 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-22 12:32:03,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:32:03 BoogieIcfgContainer [2021-12-22 12:32:03,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:32:03,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:32:03,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:32:03,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:32:03,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:31:55" (1/3) ... [2021-12-22 12:32:03,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62928043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:32:03, skipping insertion in model container [2021-12-22 12:32:03,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:31:57" (2/3) ... [2021-12-22 12:32:03,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62928043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:32:03, skipping insertion in model container [2021-12-22 12:32:03,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:32:03" (3/3) ... [2021-12-22 12:32:03,442 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-2.c [2021-12-22 12:32:03,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:32:03,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:32:03,493 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:32:03,499 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:32:03,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:32:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 12:32:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:03,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:03,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:03,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-12-22 12:32:03,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980655758] [2021-12-22 12:32:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:03,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:03,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980655758] [2021-12-22 12:32:03,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980655758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:03,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:03,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:32:03,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150636684] [2021-12-22 12:32:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:32:03,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:32:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:32:03,923 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:04,536 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2021-12-22 12:32:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:32:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:04,560 INFO L225 Difference]: With dead ends: 4824 [2021-12-22 12:32:04,561 INFO L226 Difference]: Without dead ends: 2441 [2021-12-22 12:32:04,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:32:04,573 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 4444 mSDsluCounter, 12475 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 16724 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:04,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4453 Valid, 16724 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:32:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-12-22 12:32:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2021-12-22 12:32:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8340480274442539) internal successors, (4277), 2336 states have internal predecessors, (4277), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-22 12:32:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2021-12-22 12:32:04,690 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2021-12-22 12:32:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:04,691 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2021-12-22 12:32:04,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2021-12-22 12:32:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:04,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:04,693 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] [2021-12-22 12:32:04,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:32:04,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2021-12-22 12:32:04,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:04,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743336423] [2021-12-22 12:32:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:04,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:04,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743336423] [2021-12-22 12:32:04,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743336423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:04,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:04,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:04,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610871558] [2021-12-22 12:32:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:04,856 INFO L87 Difference]: Start difference. First operand 2376 states and 4336 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:05,617 INFO L93 Difference]: Finished difference Result 2838 states and 5030 transitions. [2021-12-22 12:32:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:32:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:05,626 INFO L225 Difference]: With dead ends: 2838 [2021-12-22 12:32:05,626 INFO L226 Difference]: Without dead ends: 2593 [2021-12-22 12:32:05,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:32:05,629 INFO L933 BasicCegarLoop]: 4270 mSDtfsCounter, 4365 mSDsluCounter, 16547 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20817 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:05,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20817 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:32:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2021-12-22 12:32:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2490. [2021-12-22 12:32:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.82001647446458) internal successors, (4419), 2433 states have internal predecessors, (4419), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-22 12:32:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4502 transitions. [2021-12-22 12:32:05,674 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4502 transitions. Word has length 69 [2021-12-22 12:32:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:05,675 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4502 transitions. [2021-12-22 12:32:05,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4502 transitions. [2021-12-22 12:32:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:05,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:05,677 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] [2021-12-22 12:32:05,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:32:05,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2021-12-22 12:32:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:05,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059984718] [2021-12-22 12:32:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:05,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:05,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:05,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059984718] [2021-12-22 12:32:05,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059984718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:05,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:05,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:05,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415822077] [2021-12-22 12:32:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:05,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:05,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:05,805 INFO L87 Difference]: Start difference. First operand 2490 states and 4502 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:06,686 INFO L93 Difference]: Finished difference Result 3239 states and 5624 transitions. [2021-12-22 12:32:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:32:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:06,697 INFO L225 Difference]: With dead ends: 3239 [2021-12-22 12:32:06,697 INFO L226 Difference]: Without dead ends: 2880 [2021-12-22 12:32:06,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:32:06,700 INFO L933 BasicCegarLoop]: 4181 mSDtfsCounter, 4399 mSDsluCounter, 16326 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4408 SdHoareTripleChecker+Valid, 20507 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:06,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4408 Valid, 20507 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:32:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-12-22 12:32:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2719. [2021-12-22 12:32:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2621 states have (on average 1.794734834032812) internal successors, (4704), 2628 states have internal predecessors, (4704), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-22 12:32:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4839 transitions. [2021-12-22 12:32:06,751 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4839 transitions. Word has length 69 [2021-12-22 12:32:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:06,752 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 4839 transitions. [2021-12-22 12:32:06,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4839 transitions. [2021-12-22 12:32:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:06,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:06,753 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] [2021-12-22 12:32:06,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:32:06,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2021-12-22 12:32:06,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:06,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916121041] [2021-12-22 12:32:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:06,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:06,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916121041] [2021-12-22 12:32:06,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916121041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:06,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:06,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:06,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240441712] [2021-12-22 12:32:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:06,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:06,811 INFO L87 Difference]: Start difference. First operand 2719 states and 4839 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:07,568 INFO L93 Difference]: Finished difference Result 4113 states and 6915 transitions. [2021-12-22 12:32:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:32:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:07,580 INFO L225 Difference]: With dead ends: 4113 [2021-12-22 12:32:07,581 INFO L226 Difference]: Without dead ends: 3525 [2021-12-22 12:32:07,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:32:07,584 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 4371 mSDsluCounter, 16532 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 20811 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:07,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 20811 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:32:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2021-12-22 12:32:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3131. [2021-12-22 12:32:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2965 states have (on average 1.7551433389544688) internal successors, (5204), 2976 states have internal predecessors, (5204), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-22 12:32:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5441 transitions. [2021-12-22 12:32:07,662 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5441 transitions. Word has length 69 [2021-12-22 12:32:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:07,663 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 5441 transitions. [2021-12-22 12:32:07,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5441 transitions. [2021-12-22 12:32:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:07,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:07,665 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] [2021-12-22 12:32:07,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:32:07,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2021-12-22 12:32:07,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:07,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072760897] [2021-12-22 12:32:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:07,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:07,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:07,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072760897] [2021-12-22 12:32:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072760897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:07,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:07,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:07,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247091194] [2021-12-22 12:32:07,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:07,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:07,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:07,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:07,723 INFO L87 Difference]: Start difference. First operand 3131 states and 5441 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:08,397 INFO L93 Difference]: Finished difference Result 5511 states and 8955 transitions. [2021-12-22 12:32:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:32:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:08,412 INFO L225 Difference]: With dead ends: 5511 [2021-12-22 12:32:08,412 INFO L226 Difference]: Without dead ends: 4511 [2021-12-22 12:32:08,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:32:08,416 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4376 mSDsluCounter, 16535 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4388 SdHoareTripleChecker+Valid, 20783 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4388 Valid, 20783 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:32:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-12-22 12:32:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3988. [2021-12-22 12:32:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3690 states have (on average 1.7002710027100272) internal successors, (6274), 3709 states have internal predecessors, (6274), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-22 12:32:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6725 transitions. [2021-12-22 12:32:08,526 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6725 transitions. Word has length 69 [2021-12-22 12:32:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:08,527 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 6725 transitions. [2021-12-22 12:32:08,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6725 transitions. [2021-12-22 12:32:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:32:08,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:08,530 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] [2021-12-22 12:32:08,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:32:08,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2021-12-22 12:32:08,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492263867] [2021-12-22 12:32:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:08,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:08,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492263867] [2021-12-22 12:32:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492263867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:08,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:08,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:32:08,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494568657] [2021-12-22 12:32:08,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:08,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:32:08,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:32:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:32:08,616 INFO L87 Difference]: Start difference. First operand 3988 states and 6725 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:09,306 INFO L93 Difference]: Finished difference Result 7372 states and 11760 transitions. [2021-12-22 12:32:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:32:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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 69 [2021-12-22 12:32:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:09,324 INFO L225 Difference]: With dead ends: 7372 [2021-12-22 12:32:09,324 INFO L226 Difference]: Without dead ends: 5516 [2021-12-22 12:32:09,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:32:09,331 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4499 mSDsluCounter, 12284 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4524 SdHoareTripleChecker+Valid, 16596 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:09,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4524 Valid, 16596 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:32:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-12-22 12:32:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4929. [2021-12-22 12:32:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4473 states have (on average 1.6492287055667338) internal successors, (7377), 4509 states have internal predecessors, (7377), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-22 12:32:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 8048 transitions. [2021-12-22 12:32:09,443 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 8048 transitions. Word has length 69 [2021-12-22 12:32:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:09,444 INFO L470 AbstractCegarLoop]: Abstraction has 4929 states and 8048 transitions. [2021-12-22 12:32:09,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (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) [2021-12-22 12:32:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 8048 transitions. [2021-12-22 12:32:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 12:32:09,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:09,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:09,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:32:09,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2021-12-22 12:32:09,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978415808] [2021-12-22 12:32:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:09,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:32:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:32:09,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978415808] [2021-12-22 12:32:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978415808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576475750] [2021-12-22 12:32:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:09,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:09,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:09,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:32:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:09,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:32:09,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:09,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576475750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:09,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:09,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:32:09,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572840978] [2021-12-22 12:32:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:09,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:09,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:09,855 INFO L87 Difference]: Start difference. First operand 4929 states and 8048 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:09,974 INFO L93 Difference]: Finished difference Result 10380 states and 16066 transitions. [2021-12-22 12:32:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-22 12:32:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:10,014 INFO L225 Difference]: With dead ends: 10380 [2021-12-22 12:32:10,014 INFO L226 Difference]: Without dead ends: 7583 [2021-12-22 12:32:10,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:10,025 INFO L933 BasicCegarLoop]: 4162 mSDtfsCounter, 4110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:10,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2021-12-22 12:32:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 7527. [2021-12-22 12:32:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 6657 states have (on average 1.5841970857743728) internal successors, (10546), 6726 states have internal predecessors, (10546), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-22 12:32:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11803 transitions. [2021-12-22 12:32:10,223 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11803 transitions. Word has length 111 [2021-12-22 12:32:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:10,224 INFO L470 AbstractCegarLoop]: Abstraction has 7527 states and 11803 transitions. [2021-12-22 12:32:10,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11803 transitions. [2021-12-22 12:32:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 12:32:10,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:10,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:10,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 12:32:10,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:10,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2021-12-22 12:32:10,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:10,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728758998] [2021-12-22 12:32:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:10,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:32:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:32:10,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:10,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728758998] [2021-12-22 12:32:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728758998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:10,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775699859] [2021-12-22 12:32:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:10,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:10,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:10,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:32:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:32:10,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:10,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775699859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:10,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:10,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:10,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209570822] [2021-12-22 12:32:10,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:10,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:10,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:10,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:10,874 INFO L87 Difference]: Start difference. First operand 7527 states and 11803 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:32:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:11,170 INFO L93 Difference]: Finished difference Result 17935 states and 27159 transitions. [2021-12-22 12:32:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-22 12:32:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:11,209 INFO L225 Difference]: With dead ends: 17935 [2021-12-22 12:32:11,209 INFO L226 Difference]: Without dead ends: 12541 [2021-12-22 12:32:11,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:11,230 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 154 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8461 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:11,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8461 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2021-12-22 12:32:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 12541. [2021-12-22 12:32:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 10858 states have (on average 1.5209983422361393) internal successors, (16515), 10976 states have internal predecessors, (16515), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-22 12:32:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 19088 transitions. [2021-12-22 12:32:11,641 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 19088 transitions. Word has length 111 [2021-12-22 12:32:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:11,641 INFO L470 AbstractCegarLoop]: Abstraction has 12541 states and 19088 transitions. [2021-12-22 12:32:11,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:32:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 19088 transitions. [2021-12-22 12:32:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 12:32:11,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:11,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:11,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:11,882 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,SelfDestructingSolverStorable7 [2021-12-22 12:32:11,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2021-12-22 12:32:11,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086097677] [2021-12-22 12:32:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:11,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:32:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 12:32:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 12:32:11,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086097677] [2021-12-22 12:32:11,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086097677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99038374] [2021-12-22 12:32:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:11,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:11,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:11,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:32:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:12,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:32:12,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:12,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99038374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:12,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:32:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543705299] [2021-12-22 12:32:12,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:12,309 INFO L87 Difference]: Start difference. First operand 12541 states and 19088 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:32:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:12,990 INFO L93 Difference]: Finished difference Result 32917 states and 49009 transitions. [2021-12-22 12:32:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-22 12:32:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:13,059 INFO L225 Difference]: With dead ends: 32917 [2021-12-22 12:32:13,059 INFO L226 Difference]: Without dead ends: 22513 [2021-12-22 12:32:13,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:13,097 INFO L933 BasicCegarLoop]: 4183 mSDtfsCounter, 4068 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4354 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:13,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4068 Valid, 4354 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22513 states. [2021-12-22 12:32:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22513 to 22301. [2021-12-22 12:32:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22301 states, 19038 states have (on average 1.4810904506775922) internal successors, (28197), 19270 states have internal predecessors, (28197), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-22 12:32:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22301 states to 22301 states and 33106 transitions. [2021-12-22 12:32:13,842 INFO L78 Accepts]: Start accepts. Automaton has 22301 states and 33106 transitions. Word has length 143 [2021-12-22 12:32:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:13,842 INFO L470 AbstractCegarLoop]: Abstraction has 22301 states and 33106 transitions. [2021-12-22 12:32:13,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:32:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 22301 states and 33106 transitions. [2021-12-22 12:32:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:32:13,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:13,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:13,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:14,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2021-12-22 12:32:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986095493] [2021-12-22 12:32:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:32:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:32:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:32:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:32:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 12:32:14,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986095493] [2021-12-22 12:32:14,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986095493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:14,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057300543] [2021-12-22 12:32:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:14,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:14,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:14,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:32:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:14,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 12:32:14,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057300543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:14,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:14,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:14,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692673361] [2021-12-22 12:32:14,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:14,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:14,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:14,779 INFO L87 Difference]: Start difference. First operand 22301 states and 33106 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:32:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:15,487 INFO L93 Difference]: Finished difference Result 44821 states and 66508 transitions. [2021-12-22 12:32:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-22 12:32:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:15,560 INFO L225 Difference]: With dead ends: 44821 [2021-12-22 12:32:15,561 INFO L226 Difference]: Without dead ends: 24655 [2021-12-22 12:32:15,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:15,620 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4087 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4183 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:15,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:15,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2021-12-22 12:32:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24655. [2021-12-22 12:32:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 21180 states have (on average 1.4241265344664777) internal successors, (30163), 21412 states have internal predecessors, (30163), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-22 12:32:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 35194 transitions. [2021-12-22 12:32:16,580 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 35194 transitions. Word has length 160 [2021-12-22 12:32:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 24655 states and 35194 transitions. [2021-12-22 12:32:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:32:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 35194 transitions. [2021-12-22 12:32:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:32:16,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:16,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:16,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:16,848 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2021-12-22 12:32:16,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861771898] [2021-12-22 12:32:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:32:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:32:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:32:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:32:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:32:16,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:16,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861771898] [2021-12-22 12:32:16,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861771898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:16,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856258916] [2021-12-22 12:32:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:16,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:16,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:16,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:16,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:32:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:32:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 12:32:17,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:17,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856258916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:17,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:17,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:17,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796127534] [2021-12-22 12:32:17,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:17,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:17,271 INFO L87 Difference]: Start difference. First operand 24655 states and 35194 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:32:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:17,910 INFO L93 Difference]: Finished difference Result 41688 states and 58732 transitions. [2021-12-22 12:32:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-22 12:32:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:17,989 INFO L225 Difference]: With dead ends: 41688 [2021-12-22 12:32:17,989 INFO L226 Difference]: Without dead ends: 26195 [2021-12-22 12:32:18,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:18,025 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4088 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:18,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4349 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2021-12-22 12:32:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 26055. [2021-12-22 12:32:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26055 states, 22468 states have (on average 1.3989229125867901) internal successors, (31431), 22700 states have internal predecessors, (31431), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-22 12:32:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26055 states to 26055 states and 36594 transitions. [2021-12-22 12:32:19,000 INFO L78 Accepts]: Start accepts. Automaton has 26055 states and 36594 transitions. Word has length 160 [2021-12-22 12:32:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:19,000 INFO L470 AbstractCegarLoop]: Abstraction has 26055 states and 36594 transitions. [2021-12-22 12:32:19,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:32:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 26055 states and 36594 transitions. [2021-12-22 12:32:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:32:19,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:19,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:19,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:19,251 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,SelfDestructingSolverStorable10 [2021-12-22 12:32:19,252 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2021-12-22 12:32:19,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:19,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007241748] [2021-12-22 12:32:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:19,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:32:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:32:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:32:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:32:19,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007241748] [2021-12-22 12:32:19,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007241748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943160872] [2021-12-22 12:32:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:19,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:19,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 12:32:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:32:19,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943160872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:19,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:19,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:19,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726002018] [2021-12-22 12:32:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:19,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:19,641 INFO L87 Difference]: Start difference. First operand 26055 states and 36594 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:32:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:21,120 INFO L93 Difference]: Finished difference Result 72665 states and 101108 transitions. [2021-12-22 12:32:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-22 12:32:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:21,243 INFO L225 Difference]: With dead ends: 72665 [2021-12-22 12:32:21,244 INFO L226 Difference]: Without dead ends: 48749 [2021-12-22 12:32:21,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:21,283 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 163 mSDsluCounter, 4147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 8467 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:21,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 8467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48749 states. [2021-12-22 12:32:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48749 to 48705. [2021-12-22 12:32:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48705 states, 41704 states have (on average 1.3657442931133703) internal successors, (56957), 42166 states have internal predecessors, (56957), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2021-12-22 12:32:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48705 states to 48705 states and 67866 transitions. [2021-12-22 12:32:23,126 INFO L78 Accepts]: Start accepts. Automaton has 48705 states and 67866 transitions. Word has length 161 [2021-12-22 12:32:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:23,127 INFO L470 AbstractCegarLoop]: Abstraction has 48705 states and 67866 transitions. [2021-12-22 12:32:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:32:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 48705 states and 67866 transitions. [2021-12-22 12:32:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:32:23,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:23,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:23,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:23,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:23,426 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2021-12-22 12:32:23,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:23,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345067724] [2021-12-22 12:32:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:23,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:32:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:32:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:32:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 12:32:23,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:23,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345067724] [2021-12-22 12:32:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345067724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517205089] [2021-12-22 12:32:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:23,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:23,536 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:23,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 12:32:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 12:32:23,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:23,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517205089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:23,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:23,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:23,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320764349] [2021-12-22 12:32:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:23,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:23,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:23,848 INFO L87 Difference]: Start difference. First operand 48705 states and 67866 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:32:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:25,195 INFO L93 Difference]: Finished difference Result 79069 states and 111521 transitions. [2021-12-22 12:32:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-12-22 12:32:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:25,313 INFO L225 Difference]: With dead ends: 79069 [2021-12-22 12:32:25,313 INFO L226 Difference]: Without dead ends: 41521 [2021-12-22 12:32:25,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:25,371 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 4082 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4181 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:25,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4082 Valid, 4181 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41521 states. [2021-12-22 12:32:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41521 to 30305. [2021-12-22 12:32:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 26128 states have (on average 1.3429654011022658) internal successors, (35089), 26370 states have internal predecessors, (35089), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2021-12-22 12:32:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 41122 transitions. [2021-12-22 12:32:26,983 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 41122 transitions. Word has length 161 [2021-12-22 12:32:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:26,984 INFO L470 AbstractCegarLoop]: Abstraction has 30305 states and 41122 transitions. [2021-12-22 12:32:26,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:32:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 41122 transitions. [2021-12-22 12:32:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:32:27,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:27,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:27,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:27,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:27,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2021-12-22 12:32:27,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:27,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158531292] [2021-12-22 12:32:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:27,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:32:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 12:32:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:32:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:32:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 12:32:27,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158531292] [2021-12-22 12:32:27,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158531292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569894349] [2021-12-22 12:32:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:27,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:27,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:27,323 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:27,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 12:32:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:32:27,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569894349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:27,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:27,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:27,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841932671] [2021-12-22 12:32:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:27,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:27,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:27,635 INFO L87 Difference]: Start difference. First operand 30305 states and 41122 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:32:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:29,417 INFO L93 Difference]: Finished difference Result 82213 states and 110894 transitions. [2021-12-22 12:32:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-22 12:32:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:29,600 INFO L225 Difference]: With dead ends: 82213 [2021-12-22 12:32:29,601 INFO L226 Difference]: Without dead ends: 54057 [2021-12-22 12:32:29,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:29,652 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 150 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 8458 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:29,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 8458 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54057 states. [2021-12-22 12:32:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54057 to 54053. [2021-12-22 12:32:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3125974363415902) internal successors, (60621), 46666 states have internal predecessors, (60621), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-22 12:32:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 73088 transitions. [2021-12-22 12:32:31,851 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 73088 transitions. Word has length 161 [2021-12-22 12:32:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:31,851 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 73088 transitions. [2021-12-22 12:32:31,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:32:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 73088 transitions. [2021-12-22 12:32:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:32:31,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:31,906 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:31,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:32,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 12:32:32,123 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1491732838, now seen corresponding path program 1 times [2021-12-22 12:32:32,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635220020] [2021-12-22 12:32:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:32,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:32:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:32:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:32:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:32:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 12:32:32,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635220020] [2021-12-22 12:32:32,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635220020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751240316] [2021-12-22 12:32:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:32,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:32,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:32,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 12:32:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:32:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 12:32:32,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:32,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751240316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:32,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:32,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:32,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205065289] [2021-12-22 12:32:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:32,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:32,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:32,558 INFO L87 Difference]: Start difference. First operand 54053 states and 73088 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:32:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:34,698 INFO L93 Difference]: Finished difference Result 95015 states and 127828 transitions. [2021-12-22 12:32:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-22 12:32:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:34,954 INFO L225 Difference]: With dead ends: 95015 [2021-12-22 12:32:34,954 INFO L226 Difference]: Without dead ends: 54897 [2021-12-22 12:32:35,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:35,010 INFO L933 BasicCegarLoop]: 4186 mSDtfsCounter, 4108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:35,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4357 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54897 states. [2021-12-22 12:32:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54897 to 54053. [2021-12-22 12:32:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3048025290143772) internal successors, (60261), 46666 states have internal predecessors, (60261), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-22 12:32:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 72728 transitions. [2021-12-22 12:32:37,473 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 72728 transitions. Word has length 161 [2021-12-22 12:32:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:37,474 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 72728 transitions. [2021-12-22 12:32:37,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:32:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 72728 transitions. [2021-12-22 12:32:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 12:32:37,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:37,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:37,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:37,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 12:32:37,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash -251057197, now seen corresponding path program 1 times [2021-12-22 12:32:37,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161291071] [2021-12-22 12:32:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:37,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:32:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:32:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:32:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:32:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:32:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:32:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:32:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:32:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:32:37,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:37,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161291071] [2021-12-22 12:32:37,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161291071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:37,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014506732] [2021-12-22 12:32:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:37,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:37,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:32:37,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 12:32:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:32:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 12:32:38,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014506732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:38,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:38,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:38,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630528615] [2021-12-22 12:32:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:38,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:38,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:38,150 INFO L87 Difference]: Start difference. First operand 54053 states and 72728 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:32:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:40,205 INFO L93 Difference]: Finished difference Result 94725 states and 126938 transitions. [2021-12-22 12:32:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-22 12:32:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:40,375 INFO L225 Difference]: With dead ends: 94725 [2021-12-22 12:32:40,376 INFO L226 Difference]: Without dead ends: 55449 [2021-12-22 12:32:40,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:40,433 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4107 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:40,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4373 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55449 states. [2021-12-22 12:32:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55449 to 53933. [2021-12-22 12:32:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53933 states, 46064 states have (on average 1.2977813476901703) internal successors, (59781), 46546 states have internal predecessors, (59781), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200)