./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/barrier_2t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/pthread-divine/barrier_2t.i -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 f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:53:06,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:53:06,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:53:06,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:53:06,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:53:06,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:53:06,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:53:06,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:53:06,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:53:06,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:53:06,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:53:06,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:53:06,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:53:06,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:53:06,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:53:06,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:53:06,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:53:06,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:53:06,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:53:06,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:53:06,633 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:53:06,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:53:06,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:53:06,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:53:06,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:53:06,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:53:06,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:53:06,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:53:06,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:53:06,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:53:06,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:53:06,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:53:06,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:53:06,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:53:06,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:53:06,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:53:06,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:53:06,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:53:06,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:53:06,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:53:06,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:53:06,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:53:06,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:53:06,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:53:06,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:53:06,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:53:06,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:53:06,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:53:06,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:53:06,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:53:06,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:53:06,677 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:53:06,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:53:06,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:53:06,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:53:06,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:53:06,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:53:06,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:06,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:53:06,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:53:06,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:53:06,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:53:06,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:53:06,681 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:53:06,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:53:06,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:53:06,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 [2022-07-13 21:53:06,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:53:06,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:53:06,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:53:06,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:53:06,880 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:53:06,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-13 21:53:06,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50142ec/3ec94c58e8944a9c95ed0fd00013d3b5/FLAG8823ae938 [2022-07-13 21:53:07,321 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:53:07,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-13 21:53:07,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50142ec/3ec94c58e8944a9c95ed0fd00013d3b5/FLAG8823ae938 [2022-07-13 21:53:07,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50142ec/3ec94c58e8944a9c95ed0fd00013d3b5 [2022-07-13 21:53:07,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:53:07,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:53:07,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:07,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:53:07,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:53:07,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:07" (1/1) ... [2022-07-13 21:53:07,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608d4540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:07, skipping insertion in model container [2022-07-13 21:53:07,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:07" (1/1) ... [2022-07-13 21:53:07,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:53:07,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:53:07,870 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:07,962 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/pthread-divine/barrier_2t.i[30484,30497] [2022-07-13 21:53:07,991 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/pthread-divine/barrier_2t.i[31858,31871] [2022-07-13 21:53:07,992 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/pthread-divine/barrier_2t.i[31909,31922] [2022-07-13 21:53:07,994 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/pthread-divine/barrier_2t.i[32058,32071] [2022-07-13 21:53:07,995 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/pthread-divine/barrier_2t.i[32135,32148] [2022-07-13 21:53:07,996 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/pthread-divine/barrier_2t.i[32182,32195] [2022-07-13 21:53:07,998 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/pthread-divine/barrier_2t.i[32291,32304] [2022-07-13 21:53:07,999 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/pthread-divine/barrier_2t.i[32410,32423] [2022-07-13 21:53:08,001 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/pthread-divine/barrier_2t.i[32458,32471] [2022-07-13 21:53:08,002 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/pthread-divine/barrier_2t.i[32535,32548] [2022-07-13 21:53:08,004 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/pthread-divine/barrier_2t.i[32661,32674] [2022-07-13 21:53:08,014 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/pthread-divine/barrier_2t.i[33244,33257] [2022-07-13 21:53:08,018 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/pthread-divine/barrier_2t.i[33321,33334] [2022-07-13 21:53:08,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:08,033 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:53:08,054 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:08,065 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/pthread-divine/barrier_2t.i[30484,30497] [2022-07-13 21:53:08,080 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/pthread-divine/barrier_2t.i[31858,31871] [2022-07-13 21:53:08,082 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/pthread-divine/barrier_2t.i[31909,31922] [2022-07-13 21:53:08,084 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/pthread-divine/barrier_2t.i[32058,32071] [2022-07-13 21:53:08,085 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/pthread-divine/barrier_2t.i[32135,32148] [2022-07-13 21:53:08,088 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/pthread-divine/barrier_2t.i[32182,32195] [2022-07-13 21:53:08,090 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/pthread-divine/barrier_2t.i[32291,32304] [2022-07-13 21:53:08,092 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/pthread-divine/barrier_2t.i[32410,32423] [2022-07-13 21:53:08,093 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/pthread-divine/barrier_2t.i[32458,32471] [2022-07-13 21:53:08,094 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/pthread-divine/barrier_2t.i[32535,32548] [2022-07-13 21:53:08,097 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/pthread-divine/barrier_2t.i[32661,32674] [2022-07-13 21:53:08,107 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/pthread-divine/barrier_2t.i[33244,33257] [2022-07-13 21:53:08,108 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/pthread-divine/barrier_2t.i[33321,33334] [2022-07-13 21:53:08,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:08,141 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:53:08,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08 WrapperNode [2022-07-13 21:53:08,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:08,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:08,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:53:08,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:53:08,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,213 INFO L137 Inliner]: procedures = 174, calls = 78, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 521 [2022-07-13 21:53:08,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:08,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:53:08,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:53:08,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:53:08,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:53:08,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:53:08,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:53:08,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:53:08,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (1/1) ... [2022-07-13 21:53:08,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:08,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:53:08,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:53:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:53:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:53:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:53:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-13 21:53:08,348 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-13 21:53:08,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:53:08,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:53:08,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:53:08,351 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:53:08,448 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:53:08,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:53:08,982 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:53:08,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:53:08,997 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2022-07-13 21:53:08,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:08 BoogieIcfgContainer [2022-07-13 21:53:09,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:53:09,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:53:09,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:53:09,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:53:09,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:53:07" (1/3) ... [2022-07-13 21:53:09,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2008beaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:09, skipping insertion in model container [2022-07-13 21:53:09,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:08" (2/3) ... [2022-07-13 21:53:09,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2008beaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:09, skipping insertion in model container [2022-07-13 21:53:09,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:08" (3/3) ... [2022-07-13 21:53:09,007 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier_2t.i [2022-07-13 21:53:09,012 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:53:09,019 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:53:09,019 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-13 21:53:09,019 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:53:09,127 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:53:09,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 514 places, 581 transitions, 1170 flow [2022-07-13 21:53:09,335 INFO L129 PetriNetUnfolder]: 106/858 cut-off events. [2022-07-13 21:53:09,335 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:09,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 858 events. 106/858 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3081 event pairs, 0 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 512. Up to 4 conditions per place. [2022-07-13 21:53:09,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 581 transitions, 1170 flow [2022-07-13 21:53:09,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 581 transitions, 1170 flow [2022-07-13 21:53:09,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:09,377 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@469aa542, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a230dcf [2022-07-13 21:53:09,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-13 21:53:09,383 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-13 21:53:09,384 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:09,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:09,384 INFO L200 CegarLoopForPetriNet]: 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] [2022-07-13 21:53:09,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 682126804, now seen corresponding path program 1 times [2022-07-13 21:53:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236682371] [2022-07-13 21:53:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:09,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:09,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236682371] [2022-07-13 21:53:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236682371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:09,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:09,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:09,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500292159] [2022-07-13 21:53:09,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:09,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:09,608 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 581 [2022-07-13 21:53:09,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 581 transitions, 1170 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:09,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 581 [2022-07-13 21:53:09,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:09,761 INFO L129 PetriNetUnfolder]: 40/792 cut-off events. [2022-07-13 21:53:09,761 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:53:09,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 792 events. 40/792 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2911 event pairs, 0 based on Foata normal form. 66/780 useless extension candidates. Maximal degree in co-relation 473. Up to 4 conditions per place. [2022-07-13 21:53:09,775 INFO L132 encePairwiseOnDemand]: 538/581 looper letters, 2 selfloop transitions, 0 changer transitions 0/538 dead transitions. [2022-07-13 21:53:09,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 538 transitions, 1088 flow [2022-07-13 21:53:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1117 transitions. [2022-07-13 21:53:09,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9612736660929432 [2022-07-13 21:53:09,797 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1117 transitions. [2022-07-13 21:53:09,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1117 transitions. [2022-07-13 21:53:09,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:09,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1117 transitions. [2022-07-13 21:53:09,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 558.5) internal successors, (1117), 2 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,816 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,818 INFO L186 Difference]: Start difference. First operand has 514 places, 581 transitions, 1170 flow. Second operand 2 states and 1117 transitions. [2022-07-13 21:53:09,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 538 transitions, 1088 flow [2022-07-13 21:53:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 538 transitions, 1088 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:09,837 INFO L242 Difference]: Finished difference. Result has 515 places, 538 transitions, 1084 flow [2022-07-13 21:53:09,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1084, PETRI_PLACES=515, PETRI_TRANSITIONS=538} [2022-07-13 21:53:09,843 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2022-07-13 21:53:09,844 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 538 transitions, 1084 flow [2022-07-13 21:53:09,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:09,845 INFO L200 CegarLoopForPetriNet]: 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] [2022-07-13 21:53:09,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:53:09,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1870030157, now seen corresponding path program 1 times [2022-07-13 21:53:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283943926] [2022-07-13 21:53:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:09,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:09,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283943926] [2022-07-13 21:53:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283943926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:09,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:09,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:53:09,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18408888] [2022-07-13 21:53:09,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:53:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:53:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:53:09,933 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-13 21:53:09,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 538 transitions, 1084 flow. Second operand has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:09,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:09,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-13 21:53:09,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:10,052 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-13 21:53:10,052 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:53:10,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 798 events. 40/798 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2909 event pairs, 0 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 819. Up to 12 conditions per place. [2022-07-13 21:53:10,067 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 15 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-07-13 21:53:10,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 544 transitions, 1130 flow [2022-07-13 21:53:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:53:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:53:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1599 transitions. [2022-07-13 21:53:10,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173838209982789 [2022-07-13 21:53:10,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1599 transitions. [2022-07-13 21:53:10,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1599 transitions. [2022-07-13 21:53:10,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:10,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1599 transitions. [2022-07-13 21:53:10,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,078 INFO L186 Difference]: Start difference. First operand has 515 places, 538 transitions, 1084 flow. Second operand 3 states and 1599 transitions. [2022-07-13 21:53:10,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 544 transitions, 1130 flow [2022-07-13 21:53:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 544 transitions, 1130 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:10,086 INFO L242 Difference]: Finished difference. Result has 518 places, 539 transitions, 1096 flow [2022-07-13 21:53:10,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1096, PETRI_PLACES=518, PETRI_TRANSITIONS=539} [2022-07-13 21:53:10,087 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 4 predicate places. [2022-07-13 21:53:10,087 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 539 transitions, 1096 flow [2022-07-13 21:53:10,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:10,089 INFO L200 CegarLoopForPetriNet]: 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] [2022-07-13 21:53:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:53:10,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1201829103, now seen corresponding path program 1 times [2022-07-13 21:53:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:10,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875405238] [2022-07-13 21:53:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875405238] [2022-07-13 21:53:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875405238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:53:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079329155] [2022-07-13 21:53:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:10,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:10,166 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) [2022-07-13 21:53:10,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:53:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:10,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:53:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:53:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:10,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:53:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:10,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079329155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:53:10,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:53:10,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-13 21:53:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796742251] [2022-07-13 21:53:10,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:53:10,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:10,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-13 21:53:10,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 539 transitions, 1096 flow. Second operand has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:10,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-13 21:53:10,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:10,511 INFO L129 PetriNetUnfolder]: 40/800 cut-off events. [2022-07-13 21:53:10,512 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-13 21:53:10,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 800 events. 40/800 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2900 event pairs, 0 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 827. Up to 7 conditions per place. [2022-07-13 21:53:10,535 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 14 selfloop transitions, 4 changer transitions 0/545 dead transitions. [2022-07-13 21:53:10,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 545 transitions, 1144 flow [2022-07-13 21:53:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-13 21:53:10,539 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-13 21:53:10,539 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-13 21:53:10,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-13 21:53:10,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:10,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-13 21:53:10,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,548 INFO L186 Difference]: Start difference. First operand has 518 places, 539 transitions, 1096 flow. Second operand 4 states and 2127 transitions. [2022-07-13 21:53:10,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 545 transitions, 1144 flow [2022-07-13 21:53:10,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 545 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:53:10,555 INFO L242 Difference]: Finished difference. Result has 522 places, 540 transitions, 1114 flow [2022-07-13 21:53:10,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1114, PETRI_PLACES=522, PETRI_TRANSITIONS=540} [2022-07-13 21:53:10,556 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-13 21:53:10,556 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 540 transitions, 1114 flow [2022-07-13 21:53:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:10,558 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 21:53:10,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 21:53:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:10,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -24715469, now seen corresponding path program 2 times [2022-07-13 21:53:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366005232] [2022-07-13 21:53:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:10,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366005232] [2022-07-13 21:53:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366005232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:53:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702068577] [2022-07-13 21:53:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:53:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:53:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:53:10,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 581 [2022-07-13 21:53:10,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 540 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:10,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 581 [2022-07-13 21:53:10,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:10,941 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-13 21:53:10,941 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-13 21:53:10,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 798 events. 40/798 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2897 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 823. Up to 5 conditions per place. [2022-07-13 21:53:10,951 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 5 selfloop transitions, 2 changer transitions 0/538 dead transitions. [2022-07-13 21:53:10,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 538 transitions, 1124 flow [2022-07-13 21:53:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2128 transitions. [2022-07-13 21:53:10,955 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9156626506024096 [2022-07-13 21:53:10,955 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2128 transitions. [2022-07-13 21:53:10,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2128 transitions. [2022-07-13 21:53:10,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:10,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2128 transitions. [2022-07-13 21:53:10,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,963 INFO L186 Difference]: Start difference. First operand has 522 places, 540 transitions, 1114 flow. Second operand 4 states and 2128 transitions. [2022-07-13 21:53:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 538 transitions, 1124 flow [2022-07-13 21:53:10,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 538 transitions, 1120 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-13 21:53:10,971 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1110 flow [2022-07-13 21:53:10,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-13 21:53:10,972 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-13 21:53:10,972 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1110 flow [2022-07-13 21:53:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:10,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:10,974 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 21:53:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:53:10,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1817996092, now seen corresponding path program 1 times [2022-07-13 21:53:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895227150] [2022-07-13 21:53:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:11,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895227150] [2022-07-13 21:53:11,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895227150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:53:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384206793] [2022-07-13 21:53:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:11,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:11,072 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) [2022-07-13 21:53:11,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:53:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:53:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:53:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:11,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:53:11,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384206793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:11,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:53:11,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-13 21:53:11,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649112004] [2022-07-13 21:53:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:53:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:53:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:11,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-13 21:53:11,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1110 flow. Second operand has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:11,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:11,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-13 21:53:11,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:11,340 INFO L129 PetriNetUnfolder]: 40/793 cut-off events. [2022-07-13 21:53:11,340 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:53:11,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 793 events. 40/793 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2863 event pairs, 0 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 820. Up to 5 conditions per place. [2022-07-13 21:53:11,352 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 7 selfloop transitions, 3 changer transitions 0/538 dead transitions. [2022-07-13 21:53:11,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 538 transitions, 1128 flow [2022-07-13 21:53:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-13 21:53:11,356 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-13 21:53:11,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-13 21:53:11,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-13 21:53:11,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:11,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-13 21:53:11,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:11,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:11,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:11,365 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1110 flow. Second operand 4 states and 2127 transitions. [2022-07-13 21:53:11,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 538 transitions, 1128 flow [2022-07-13 21:53:11,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 538 transitions, 1121 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:53:11,373 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1116 flow [2022-07-13 21:53:11,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-13 21:53:11,376 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-13 21:53:11,376 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1116 flow [2022-07-13 21:53:11,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:11,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:11,378 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:11,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:53:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:11,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1162500929, now seen corresponding path program 1 times [2022-07-13 21:53:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818277408] [2022-07-13 21:53:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:11,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:12,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:12,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818277408] [2022-07-13 21:53:12,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818277408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:12,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:12,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-13 21:53:12,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544208399] [2022-07-13 21:53:12,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:12,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:53:12,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:53:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:53:12,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-13 21:53:12,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1116 flow. Second operand has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:12,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:12,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-13 21:53:12,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:14,632 INFO L129 PetriNetUnfolder]: 3485/15852 cut-off events. [2022-07-13 21:53:14,633 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:53:14,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 15852 events. 3485/15852 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 162984 event pairs, 1605 based on Foata normal form. 0/14208 useless extension candidates. Maximal degree in co-relation 21603. Up to 4593 conditions per place. [2022-07-13 21:53:14,734 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 265 selfloop transitions, 21 changer transitions 0/682 dead transitions. [2022-07-13 21:53:14,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 682 transitions, 1976 flow [2022-07-13 21:53:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:53:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 21:53:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 6230 transitions. [2022-07-13 21:53:14,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.714859437751004 [2022-07-13 21:53:14,750 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 6230 transitions. [2022-07-13 21:53:14,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 6230 transitions. [2022-07-13 21:53:14,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:14,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 6230 transitions. [2022-07-13 21:53:14,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 415.3333333333333) internal successors, (6230), 15 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,777 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,777 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1116 flow. Second operand 15 states and 6230 transitions. [2022-07-13 21:53:14,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 682 transitions, 1976 flow [2022-07-13 21:53:14,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 682 transitions, 1975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:53:14,787 INFO L242 Difference]: Finished difference. Result has 540 places, 549 transitions, 1221 flow [2022-07-13 21:53:14,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1221, PETRI_PLACES=540, PETRI_TRANSITIONS=549} [2022-07-13 21:53:14,789 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 26 predicate places. [2022-07-13 21:53:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 549 transitions, 1221 flow [2022-07-13 21:53:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:14,791 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:14,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:53:14,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:14,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1614772030, now seen corresponding path program 1 times [2022-07-13 21:53:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:14,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24431523] [2022-07-13 21:53:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:14,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:14,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24431523] [2022-07-13 21:53:14,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24431523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:14,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:14,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:53:14,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548177236] [2022-07-13 21:53:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:14,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:53:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:53:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:53:14,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-13 21:53:14,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 549 transitions, 1221 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:14,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:14,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-13 21:53:14,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:15,053 INFO L129 PetriNetUnfolder]: 89/1606 cut-off events. [2022-07-13 21:53:15,053 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-13 21:53:15,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1606 events. 89/1606 cut-off events. For 28/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 9185 event pairs, 0 based on Foata normal form. 1/1447 useless extension candidates. Maximal degree in co-relation 1696. Up to 12 conditions per place. [2022-07-13 21:53:15,075 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 7 selfloop transitions, 2 changer transitions 0/548 dead transitions. [2022-07-13 21:53:15,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 548 transitions, 1233 flow [2022-07-13 21:53:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:53:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:53:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1597 transitions. [2022-07-13 21:53:15,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9162363740676994 [2022-07-13 21:53:15,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1597 transitions. [2022-07-13 21:53:15,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1597 transitions. [2022-07-13 21:53:15,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:15,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1597 transitions. [2022-07-13 21:53:15,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,085 INFO L186 Difference]: Start difference. First operand has 540 places, 549 transitions, 1221 flow. Second operand 3 states and 1597 transitions. [2022-07-13 21:53:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 548 transitions, 1233 flow [2022-07-13 21:53:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 548 transitions, 1214 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-13 21:53:15,124 INFO L242 Difference]: Finished difference. Result has 533 places, 548 transitions, 1200 flow [2022-07-13 21:53:15,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1200, PETRI_PLACES=533, PETRI_TRANSITIONS=548} [2022-07-13 21:53:15,126 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 19 predicate places. [2022-07-13 21:53:15,126 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 548 transitions, 1200 flow [2022-07-13 21:53:15,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,126 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:15,126 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:15,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:53:15,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1746328945, now seen corresponding path program 1 times [2022-07-13 21:53:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:15,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200171107] [2022-07-13 21:53:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:15,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200171107] [2022-07-13 21:53:15,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200171107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:15,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:15,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:53:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480893213] [2022-07-13 21:53:15,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:53:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:53:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:53:15,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-13 21:53:15,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 548 transitions, 1200 flow. Second operand has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:15,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:15,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-13 21:53:15,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:18,190 INFO L129 PetriNetUnfolder]: 3458/16435 cut-off events. [2022-07-13 21:53:18,191 INFO L130 PetriNetUnfolder]: For 536/538 co-relation queries the response was YES. [2022-07-13 21:53:18,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22739 conditions, 16435 events. 3458/16435 cut-off events. For 536/538 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 170190 event pairs, 1671 based on Foata normal form. 0/14790 useless extension candidates. Maximal degree in co-relation 22725. Up to 4595 conditions per place. [2022-07-13 21:53:18,259 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 264 selfloop transitions, 24 changer transitions 0/686 dead transitions. [2022-07-13 21:53:18,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 686 transitions, 2072 flow [2022-07-13 21:53:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 21:53:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 21:53:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6625 transitions. [2022-07-13 21:53:18,270 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7126721170395869 [2022-07-13 21:53:18,270 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6625 transitions. [2022-07-13 21:53:18,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6625 transitions. [2022-07-13 21:53:18,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:18,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6625 transitions. [2022-07-13 21:53:18,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 414.0625) internal successors, (6625), 16 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:18,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:18,294 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:18,294 INFO L186 Difference]: Start difference. First operand has 533 places, 548 transitions, 1200 flow. Second operand 16 states and 6625 transitions. [2022-07-13 21:53:18,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 686 transitions, 2072 flow [2022-07-13 21:53:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 686 transitions, 2068 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:53:18,307 INFO L242 Difference]: Finished difference. Result has 550 places, 554 transitions, 1288 flow [2022-07-13 21:53:18,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1288, PETRI_PLACES=550, PETRI_TRANSITIONS=554} [2022-07-13 21:53:18,310 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 36 predicate places. [2022-07-13 21:53:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 554 transitions, 1288 flow [2022-07-13 21:53:18,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:18,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:18,312 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:18,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:53:18,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:53:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1091126161, now seen corresponding path program 1 times [2022-07-13 21:53:18,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283813740] [2022-07-13 21:53:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:53:18,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283813740] [2022-07-13 21:53:18,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283813740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:53:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668741484] [2022-07-13 21:53:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:18,922 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) [2022-07-13 21:53:18,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:53:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 21:53:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:53:19,331 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 21:53:19,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 21:53:19,389 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 21:53:19,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 21:53:19,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:19,878 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 21:53:19,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 21:53:19,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:20,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 21:53:20,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 21:53:20,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-13 21:53:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 21:53:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:53:20,354 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-13 21:53:20,395 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_660) |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-13 21:53:21,693 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-13 21:53:21,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9534 treesize of output 9364 [2022-07-13 21:53:22,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 21:53:22,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6674 treesize of output 6578 [2022-07-13 21:53:22,074 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-13 21:53:22,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8892 treesize of output 8508 [2022-07-13 21:53:22,117 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-13 21:53:22,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8508 treesize of output 7740 [2022-07-13 21:53:22,158 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-13 21:53:22,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7740 treesize of output 7548 [2022-07-13 21:55:02,822 INFO L356 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2022-07-13 21:55:02,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 146 [2022-07-13 21:55:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 21:55:02,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668741484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:55:02,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:55:02,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-13 21:55:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371612482] [2022-07-13 21:55:02,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:55:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 21:55:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 21:55:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2090, Unknown=47, NotChecked=198, Total=2756 [2022-07-13 21:55:02,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-13 21:55:02,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 554 transitions, 1288 flow. Second operand has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:02,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:02,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-13 21:55:02,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:09,101 INFO L129 PetriNetUnfolder]: 6657/31137 cut-off events. [2022-07-13 21:55:09,101 INFO L130 PetriNetUnfolder]: For 2895/2895 co-relation queries the response was YES. [2022-07-13 21:55:09,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44322 conditions, 31137 events. 6657/31137 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 372694 event pairs, 3476 based on Foata normal form. 67/28300 useless extension candidates. Maximal degree in co-relation 44304. Up to 5045 conditions per place. [2022-07-13 21:55:09,327 INFO L132 encePairwiseOnDemand]: 547/581 looper letters, 574 selfloop transitions, 95 changer transitions 0/1067 dead transitions. [2022-07-13 21:55:09,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1067 transitions, 3779 flow [2022-07-13 21:55:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 21:55:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-13 21:55:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 12944 transitions. [2022-07-13 21:55:09,597 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718671922713897 [2022-07-13 21:55:09,597 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 12944 transitions. [2022-07-13 21:55:09,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 12944 transitions. [2022-07-13 21:55:09,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:09,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 12944 transitions. [2022-07-13 21:55:09,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 417.5483870967742) internal successors, (12944), 31 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:09,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:09,647 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:09,648 INFO L186 Difference]: Start difference. First operand has 550 places, 554 transitions, 1288 flow. Second operand 31 states and 12944 transitions. [2022-07-13 21:55:09,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1067 transitions, 3779 flow [2022-07-13 21:55:09,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1067 transitions, 3738 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-13 21:55:09,671 INFO L242 Difference]: Finished difference. Result has 581 places, 624 transitions, 1928 flow [2022-07-13 21:55:09,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1928, PETRI_PLACES=581, PETRI_TRANSITIONS=624} [2022-07-13 21:55:09,672 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 67 predicate places. [2022-07-13 21:55:09,672 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 624 transitions, 1928 flow [2022-07-13 21:55:09,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:09,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:09,678 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:55:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:09,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-13 21:55:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 604174216, now seen corresponding path program 1 times [2022-07-13 21:55:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:09,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363303092] [2022-07-13 21:55:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:55:10,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363303092] [2022-07-13 21:55:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363303092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:55:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270735681] [2022-07-13 21:55:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:10,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:10,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:10,446 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) [2022-07-13 21:55:10,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:55:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 21:55:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:55:10,768 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 21:55:10,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 21:55:10,835 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-13 21:55:10,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-13 21:55:10,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:10,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:10,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,314 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-13 21:55:11,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-13 21:55:11,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 21:55:11,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 21:55:11,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 21:55:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 21:55:11,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:55:11,530 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-13 21:55:11,571 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int)) (v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_834) |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-13 21:55:12,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8766 treesize of output 8634 [2022-07-13 21:55:12,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4155 treesize of output 4027 [2022-07-13 21:55:12,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8182 treesize of output 7670 [2022-07-13 21:55:12,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7670 treesize of output 7414 [2022-07-13 21:55:12,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7414 treesize of output 7350