./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:58:06,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:58:06,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:58:06,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:58:06,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:58:06,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:58:06,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:58:06,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:58:06,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:58:06,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:58:06,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:58:06,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:58:06,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:58:06,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:58:06,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:58:06,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:58:06,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:58:06,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:58:06,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:58:06,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:58:06,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:58:06,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:58:06,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:58:06,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:58:06,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:58:06,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:58:06,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:58:06,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:58:06,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:58:06,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:58:06,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:58:06,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:58:06,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:58:06,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:58:06,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:58:06,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:58:06,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:58:06,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:58:06,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:58:06,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:58:06,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:58:06,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:58:06,237 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:58:06,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:58:06,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:58:06,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:58:06,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:58:06,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:58:06,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:58:06,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:58:06,239 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:58:06,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:58:06,240 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:58:06,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:58:06,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:58:06,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:58:06,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:58:06,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:58:06,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:58:06,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:58:06,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:58:06,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:58:06,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:58:06,244 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:58:06,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:58:06,244 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:58:06,244 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:58:06,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:58:06,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:58:06,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:58:06,533 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:58:06,533 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:58:06,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-31 02:58:07,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:58:07,695 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:58:07,696 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-08-31 02:58:07,710 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6cbe71c/1e9e80e47c6c4ca4b86e284477d651b6/FLAGeef7d729d [2023-08-31 02:58:07,723 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6cbe71c/1e9e80e47c6c4ca4b86e284477d651b6 [2023-08-31 02:58:07,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:58:07,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:58:07,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:58:07,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:58:07,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:58:07,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2c960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07, skipping insertion in model container [2023-08-31 02:58:07,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:58:07,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:58:07,856 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-31 02:58:07,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:58:07,869 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:58:07,884 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-08-31 02:58:07,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:58:07,891 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:58:07,892 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:58:07,896 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:58:07,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07 WrapperNode [2023-08-31 02:58:07,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:58:07,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:58:07,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:58:07,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:58:07,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,923 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 196 [2023-08-31 02:58:07,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:58:07,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:58:07,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:58:07,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:58:07,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:58:07,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:58:07,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:58:07,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:58:07,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (1/1) ... [2023-08-31 02:58:07,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:58:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:07,975 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) [2023-08-31 02:58:07,993 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 [2023-08-31 02:58:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:58:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:58:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:58:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:58:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:58:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:58:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:58:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:58:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:58:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:58:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:58:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:58:08,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:58:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:58:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:58:08,016 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:58:08,109 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:58:08,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:58:08,428 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:58:08,503 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:58:08,503 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 02:58:08,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:58:08 BoogieIcfgContainer [2023-08-31 02:58:08,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:58:08,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:58:08,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:58:08,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:58:08,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:58:07" (1/3) ... [2023-08-31 02:58:08,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ef827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:58:08, skipping insertion in model container [2023-08-31 02:58:08,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:58:07" (2/3) ... [2023-08-31 02:58:08,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ef827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:58:08, skipping insertion in model container [2023-08-31 02:58:08,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:58:08" (3/3) ... [2023-08-31 02:58:08,513 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-08-31 02:58:08,519 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:58:08,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:58:08,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:58:08,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:58:08,601 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 02:58:08,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 372 flow [2023-08-31 02:58:08,697 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2023-08-31 02:58:08,698 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:58:08,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 15/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-31 02:58:08,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 178 transitions, 372 flow [2023-08-31 02:58:08,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-08-31 02:58:08,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:58:08,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-31 02:58:08,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-31 02:58:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-08-31 02:58:08,764 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-08-31 02:58:08,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:58:08,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-31 02:58:08,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-08-31 02:58:13,011 INFO L134 LiptonReduction]: Checked pairs total: 1199 [2023-08-31 02:58:13,012 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-31 02:58:13,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:58:13,027 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8dbddf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:58:13,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 02:58:13,032 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-08-31 02:58:13,032 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:58:13,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:13,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:13,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:13,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1033780346, now seen corresponding path program 1 times [2023-08-31 02:58:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:13,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079011685] [2023-08-31 02:58:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:13,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:13,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079011685] [2023-08-31 02:58:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079011685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:58:13,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:58:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:58:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643416216] [2023-08-31 02:58:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:58:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:58:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:58:13,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-31 02:58:13,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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) [2023-08-31 02:58:13,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:13,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-31 02:58:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:13,586 INFO L130 PetriNetUnfolder]: 93/157 cut-off events. [2023-08-31 02:58:13,586 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 02:58:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 157 events. 93/157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 51 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 267. Up to 154 conditions per place. [2023-08-31 02:58:13,589 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-31 02:58:13,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-08-31 02:58:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:58:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:58:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-31 02:58:13,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-31 02:58:13,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-31 02:58:13,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-31 02:58:13,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:13,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-31 02:58:13,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2023-08-31 02:58:13,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:13,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:13,620 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 3 states and 480 transitions. [2023-08-31 02:58:13,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-08-31 02:58:13,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 02:58:13,623 INFO L231 Difference]: Finished difference. Result has 24 places, 24 transitions, 62 flow [2023-08-31 02:58:13,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=24, PETRI_TRANSITIONS=24} [2023-08-31 02:58:13,627 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-31 02:58:13,627 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 24 transitions, 62 flow [2023-08-31 02:58:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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) [2023-08-31 02:58:13,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:13,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:58:13,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:13,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -25586866, now seen corresponding path program 1 times [2023-08-31 02:58:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310801331] [2023-08-31 02:58:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310801331] [2023-08-31 02:58:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310801331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948241611] [2023-08-31 02:58:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:13,770 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) [2023-08-31 02:58:13,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:58:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:58:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:13,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:58:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948241611] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:14,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:58:14,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-08-31 02:58:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077122431] [2023-08-31 02:58:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:58:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:58:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:58:14,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-31 02:58:14,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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) [2023-08-31 02:58:14,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:14,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-31 02:58:14,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:14,159 INFO L130 PetriNetUnfolder]: 170/274 cut-off events. [2023-08-31 02:58:14,159 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 02:58:14,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 274 events. 170/274 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 36 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 550. Up to 102 conditions per place. [2023-08-31 02:58:14,161 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-31 02:58:14,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-08-31 02:58:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:58:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:58:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-08-31 02:58:14,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256628787878788 [2023-08-31 02:58:14,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-08-31 02:58:14,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-08-31 02:58:14,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:14,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-08-31 02:58:14,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 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) [2023-08-31 02:58:14,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 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) [2023-08-31 02:58:14,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 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) [2023-08-31 02:58:14,169 INFO L175 Difference]: Start difference. First operand has 24 places, 24 transitions, 62 flow. Second operand 6 states and 899 transitions. [2023-08-31 02:58:14,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-08-31 02:58:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:58:14,170 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2023-08-31 02:58:14,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-31 02:58:14,171 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-31 02:58:14,171 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2023-08-31 02:58:14,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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) [2023-08-31 02:58:14,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:14,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:14,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:58:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:14,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:14,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1406989011, now seen corresponding path program 1 times [2023-08-31 02:58:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525951007] [2023-08-31 02:58:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:14,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525951007] [2023-08-31 02:58:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525951007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:58:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:58:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:58:14,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688674321] [2023-08-31 02:58:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:58:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:58:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:58:14,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 352 [2023-08-31 02:58:14,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 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) [2023-08-31 02:58:14,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:14,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 352 [2023-08-31 02:58:14,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:14,682 INFO L130 PetriNetUnfolder]: 294/476 cut-off events. [2023-08-31 02:58:14,683 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2023-08-31 02:58:14,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 476 events. 294/476 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1767 event pairs, 55 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1126. Up to 250 conditions per place. [2023-08-31 02:58:14,686 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-08-31 02:58:14,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 336 flow [2023-08-31 02:58:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:58:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:58:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2023-08-31 02:58:14,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397727272727273 [2023-08-31 02:58:14,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2023-08-31 02:58:14,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2023-08-31 02:58:14,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:14,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2023-08-31 02:58:14,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 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) [2023-08-31 02:58:14,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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) [2023-08-31 02:58:14,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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) [2023-08-31 02:58:14,694 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 799 transitions. [2023-08-31 02:58:14,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 336 flow [2023-08-31 02:58:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 02:58:14,697 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 234 flow [2023-08-31 02:58:14,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-08-31 02:58:14,698 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-31 02:58:14,699 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 234 flow [2023-08-31 02:58:14,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 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) [2023-08-31 02:58:14,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:14,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:14,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:58:14,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:14,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1352553143, now seen corresponding path program 2 times [2023-08-31 02:58:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458193635] [2023-08-31 02:58:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:58:14,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:14,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458193635] [2023-08-31 02:58:14,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458193635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:58:14,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:58:14,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:58:14,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065253141] [2023-08-31 02:58:14,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:14,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:58:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:58:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:58:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2023-08-31 02:58:14,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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) [2023-08-31 02:58:14,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:14,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2023-08-31 02:58:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:14,903 INFO L130 PetriNetUnfolder]: 477/766 cut-off events. [2023-08-31 02:58:14,903 INFO L131 PetriNetUnfolder]: For 1197/1219 co-relation queries the response was YES. [2023-08-31 02:58:14,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 766 events. 477/766 cut-off events. For 1197/1219 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 137 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 2675. Up to 433 conditions per place. [2023-08-31 02:58:14,907 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 62 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-08-31 02:58:14,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 70 transitions, 562 flow [2023-08-31 02:58:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:58:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:58:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-08-31 02:58:14,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-08-31 02:58:14,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-08-31 02:58:14,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-08-31 02:58:14,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:14,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-08-31 02:58:14,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2023-08-31 02:58:14,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:14,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:14,912 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 234 flow. Second operand 3 states and 507 transitions. [2023-08-31 02:58:14,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 70 transitions, 562 flow [2023-08-31 02:58:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 02:58:14,919 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 271 flow [2023-08-31 02:58:14,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-08-31 02:58:14,920 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-08-31 02:58:14,920 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 271 flow [2023-08-31 02:58:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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) [2023-08-31 02:58:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:14,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:14,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:58:14,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:14,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -84645957, now seen corresponding path program 1 times [2023-08-31 02:58:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:14,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175329009] [2023-08-31 02:58:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175329009] [2023-08-31 02:58:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175329009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009713600] [2023-08-31 02:58:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:15,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:15,118 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) [2023-08-31 02:58:15,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:58:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:58:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:15,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:58:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009713600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:58:15,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:58:15,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-08-31 02:58:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129165978] [2023-08-31 02:58:15,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:15,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:58:15,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:58:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:58:15,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-31 02:58:15,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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) [2023-08-31 02:58:15,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:15,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-31 02:58:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:15,332 INFO L130 PetriNetUnfolder]: 398/667 cut-off events. [2023-08-31 02:58:15,332 INFO L131 PetriNetUnfolder]: For 1124/1156 co-relation queries the response was YES. [2023-08-31 02:58:15,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 667 events. 398/667 cut-off events. For 1124/1156 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2635 event pairs, 91 based on Foata normal form. 46/705 useless extension candidates. Maximal degree in co-relation 2414. Up to 555 conditions per place. [2023-08-31 02:58:15,337 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 5/56 dead transitions. [2023-08-31 02:58:15,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 430 flow [2023-08-31 02:58:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:58:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:58:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-31 02:58:15,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-08-31 02:58:15,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-31 02:58:15,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-31 02:58:15,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:15,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-31 02:58:15,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2023-08-31 02:58:15,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:15,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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) [2023-08-31 02:58:15,343 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 271 flow. Second operand 3 states and 502 transitions. [2023-08-31 02:58:15,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 430 flow [2023-08-31 02:58:15,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:58:15,347 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 273 flow [2023-08-31 02:58:15,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-08-31 02:58:15,348 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-31 02:58:15,348 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 273 flow [2023-08-31 02:58:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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) [2023-08-31 02:58:15,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:15,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:15,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:58:15,555 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 [2023-08-31 02:58:15,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:15,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1320014892, now seen corresponding path program 1 times [2023-08-31 02:58:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085650815] [2023-08-31 02:58:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:58:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085650815] [2023-08-31 02:58:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085650815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:58:15,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:58:15,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:58:15,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174397353] [2023-08-31 02:58:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:58:15,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:58:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:58:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:58:15,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-08-31 02:58:15,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-08-31 02:58:15,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:15,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-08-31 02:58:15,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:15,840 INFO L130 PetriNetUnfolder]: 448/776 cut-off events. [2023-08-31 02:58:15,841 INFO L131 PetriNetUnfolder]: For 1574/1606 co-relation queries the response was YES. [2023-08-31 02:58:15,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 776 events. 448/776 cut-off events. For 1574/1606 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3252 event pairs, 242 based on Foata normal form. 42/807 useless extension candidates. Maximal degree in co-relation 2509. Up to 660 conditions per place. [2023-08-31 02:58:15,844 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 41 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2023-08-31 02:58:15,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 505 flow [2023-08-31 02:58:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:58:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:58:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-31 02:58:15,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44829545454545455 [2023-08-31 02:58:15,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-31 02:58:15,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-31 02:58:15,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:15,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-31 02:58:15,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 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) [2023-08-31 02:58:15,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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) [2023-08-31 02:58:15,851 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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) [2023-08-31 02:58:15,851 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 273 flow. Second operand 5 states and 789 transitions. [2023-08-31 02:58:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 505 flow [2023-08-31 02:58:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:58:15,854 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 287 flow [2023-08-31 02:58:15,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-31 02:58:15,856 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-08-31 02:58:15,857 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 287 flow [2023-08-31 02:58:15,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-08-31 02:58:15,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:15,857 INFO L208 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] [2023-08-31 02:58:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 02:58:15,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:15,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1802696178, now seen corresponding path program 1 times [2023-08-31 02:58:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:15,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627127097] [2023-08-31 02:58:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:16,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:16,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627127097] [2023-08-31 02:58:16,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627127097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:16,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273579156] [2023-08-31 02:58:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:16,670 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) [2023-08-31 02:58:16,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:58:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 02:58:16,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:58:16,964 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-31 02:58:17,248 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-31 02:58:17,248 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 10 [2023-08-31 02:58:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:17,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:58:17,581 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 .cse1) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse4 ~queue~0.base) .cse1) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) (<= (+ c_~end~0 1) c_~start~0) (< c_~start~0 0) (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2023-08-31 02:58:17,655 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-08-31 02:58:17,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 258 treesize of output 251 [2023-08-31 02:58:17,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:17,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 185 [2023-08-31 02:58:17,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:17,693 INFO L350 Elim1Store]: Elim1 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 144 treesize of output 137 [2023-08-31 02:58:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:58:18,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273579156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:58:18,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:58:18,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-31 02:58:18,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296288040] [2023-08-31 02:58:18,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:58:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 02:58:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 02:58:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=696, Unknown=1, NotChecked=56, Total=930 [2023-08-31 02:58:18,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-08-31 02:58:18,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 287 flow. Second operand has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 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) [2023-08-31 02:58:18,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:18,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-08-31 02:58:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:23,285 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse8 (+ c_~A~0.offset (* c_~i~0 4))) (.cse10 (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse4 (<= c_~n~0 c_~end~0)) (.cse9 (<= (+ c_~end~0 1) c_~start~0)) (.cse1 (+ c_~v_old~0 1)) (.cse2 (not (= (mod c_~ok~0 256) 0))) (.cse11 (= c_~start~0 c_~end~0)) (.cse3 (< c_~start~0 0))) (and (or (and (< (select (select |c_#memory_int| c_~queue~0.base) .cse0) .cse1) .cse2) .cse3 (<= c_~end~0 c_~start~0) (<= c_~n~0 c_~start~0)) (or .cse4 (let ((.cse7 (select (select |c_#memory_int| c_~A~0.base) .cse8))) (and (forall ((~queue~0.base Int)) (let ((.cse5 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse5 .cse6) .cse7)) (< (select .cse5 .cse0) .cse1)))) (or (forall ((~queue~0.base Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) .cse6) .cse7))) .cse2))) .cse9 .cse3 .cse10) (or .cse4 .cse9 .cse3 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t2~0#1.base| 1)) .cse2 .cse11)) (= c_~ok~0 1) (or .cse4 .cse9 (and .cse2 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse11) .cse3) (or .cse4 (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse12 (select .cse13 ~queue~0.base))) (or (< (select .cse12 .cse0) .cse1) (not (= (select .cse12 .cse6) (select (select .cse13 c_~A~0.base) .cse8))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse14 ~queue~0.base) .cse6) (select (select .cse14 c_~A~0.base) .cse8))))) .cse2)) .cse9 .cse3 .cse10) (or .cse4 .cse9 (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (< c_~last~0 .cse1) .cse2 .cse11) .cse3))) is different from false [2023-08-31 02:58:25,288 INFO L130 PetriNetUnfolder]: 2576/4316 cut-off events. [2023-08-31 02:58:25,288 INFO L131 PetriNetUnfolder]: For 7316/7316 co-relation queries the response was YES. [2023-08-31 02:58:25,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16370 conditions, 4316 events. 2576/4316 cut-off events. For 7316/7316 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25460 event pairs, 153 based on Foata normal form. 60/4372 useless extension candidates. Maximal degree in co-relation 16345. Up to 1386 conditions per place. [2023-08-31 02:58:25,314 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 333 selfloop transitions, 277 changer transitions 126/736 dead transitions. [2023-08-31 02:58:25,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 736 transitions, 5810 flow [2023-08-31 02:58:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-31 02:58:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-31 02:58:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6230 transitions. [2023-08-31 02:58:25,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2602774064171123 [2023-08-31 02:58:25,329 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6230 transitions. [2023-08-31 02:58:25,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6230 transitions. [2023-08-31 02:58:25,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:25,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6230 transitions. [2023-08-31 02:58:25,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 91.61764705882354) internal successors, (6230), 68 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) [2023-08-31 02:58:25,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 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) [2023-08-31 02:58:25,367 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 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) [2023-08-31 02:58:25,367 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 287 flow. Second operand 68 states and 6230 transitions. [2023-08-31 02:58:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 736 transitions, 5810 flow [2023-08-31 02:58:25,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 736 transitions, 5776 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-31 02:58:25,393 INFO L231 Difference]: Finished difference. Result has 148 places, 343 transitions, 3632 flow [2023-08-31 02:58:25,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3632, PETRI_PLACES=148, PETRI_TRANSITIONS=343} [2023-08-31 02:58:25,394 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2023-08-31 02:58:25,394 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 343 transitions, 3632 flow [2023-08-31 02:58:25,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 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) [2023-08-31 02:58:25,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:25,396 INFO L208 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] [2023-08-31 02:58:25,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:58:25,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:25,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:25,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2003046256, now seen corresponding path program 2 times [2023-08-31 02:58:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:25,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995878045] [2023-08-31 02:58:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995878045] [2023-08-31 02:58:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995878045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895522744] [2023-08-31 02:58:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:58:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:26,585 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) [2023-08-31 02:58:26,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:58:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:58:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:58:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 02:58:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:58:26,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:58:26,736 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 02:58:26,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-31 02:58:26,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:58:26,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:58:26,832 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 02:58:26,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:58:26,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:58:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:58:27,039 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 02:58:27,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-31 02:58:27,050 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 15 [2023-08-31 02:58:27,160 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2023-08-31 02:58:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:27,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:58:27,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:27,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2023-08-31 02:58:27,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:27,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2188 treesize of output 1978 [2023-08-31 02:58:28,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:28,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1140 treesize of output 940 [2023-08-31 02:58:28,061 INFO L350 Elim1Store]: Elim1 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 638 treesize of output 542 [2023-08-31 02:58:28,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:58:28,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 804 treesize of output 724 [2023-08-31 02:58:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:58:34,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895522744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:58:34,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:58:34,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-31 02:58:34,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550143126] [2023-08-31 02:58:34,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:58:34,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 02:58:34,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 02:58:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=916, Unknown=8, NotChecked=0, Total=1122 [2023-08-31 02:58:36,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 352 [2023-08-31 02:58:36,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 343 transitions, 3632 flow. Second operand has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 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) [2023-08-31 02:58:36,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:36,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 352 [2023-08-31 02:58:36,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:46,026 WARN L839 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_219 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_219) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (<= c_~new~0 c_~v_old~0) (= c_~ok~0 1)) is different from false [2023-08-31 02:58:47,453 INFO L130 PetriNetUnfolder]: 4807/7937 cut-off events. [2023-08-31 02:58:47,453 INFO L131 PetriNetUnfolder]: For 148418/148418 co-relation queries the response was YES. [2023-08-31 02:58:47,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60879 conditions, 7937 events. 4807/7937 cut-off events. For 148418/148418 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 50617 event pairs, 303 based on Foata normal form. 5/7942 useless extension candidates. Maximal degree in co-relation 60808. Up to 2798 conditions per place. [2023-08-31 02:58:47,526 INFO L137 encePairwiseOnDemand]: 335/352 looper letters, 751 selfloop transitions, 412 changer transitions 53/1216 dead transitions. [2023-08-31 02:58:47,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1216 transitions, 17159 flow [2023-08-31 02:58:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-31 02:58:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-31 02:58:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5020 transitions. [2023-08-31 02:58:47,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2501993620414673 [2023-08-31 02:58:47,535 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5020 transitions. [2023-08-31 02:58:47,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5020 transitions. [2023-08-31 02:58:47,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:47,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5020 transitions. [2023-08-31 02:58:47,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.0701754385965) internal successors, (5020), 57 states have internal predecessors, (5020), 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) [2023-08-31 02:58:47,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 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) [2023-08-31 02:58:47,559 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 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) [2023-08-31 02:58:47,559 INFO L175 Difference]: Start difference. First operand has 148 places, 343 transitions, 3632 flow. Second operand 57 states and 5020 transitions. [2023-08-31 02:58:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1216 transitions, 17159 flow [2023-08-31 02:58:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1216 transitions, 15893 flow, removed 591 selfloop flow, removed 12 redundant places. [2023-08-31 02:58:47,946 INFO L231 Difference]: Finished difference. Result has 214 places, 689 transitions, 8375 flow [2023-08-31 02:58:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8375, PETRI_PLACES=214, PETRI_TRANSITIONS=689} [2023-08-31 02:58:47,948 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 189 predicate places. [2023-08-31 02:58:47,948 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 689 transitions, 8375 flow [2023-08-31 02:58:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 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) [2023-08-31 02:58:47,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:47,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:47,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 02:58:48,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:48,159 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:48,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:48,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1412565654, now seen corresponding path program 3 times [2023-08-31 02:58:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000601922] [2023-08-31 02:58:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:48,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:58:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000601922] [2023-08-31 02:58:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000601922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368131664] [2023-08-31 02:58:48,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:58:48,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:48,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:48,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:58:48,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:58:48,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:58:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:58:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:58:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:58:48,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:58:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:58:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368131664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:58:48,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:58:48,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-31 02:58:48,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585876209] [2023-08-31 02:58:48,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:58:48,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:58:48,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:48,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:58:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:58:48,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-31 02:58:48,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 689 transitions, 8375 flow. Second operand has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 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) [2023-08-31 02:58:48,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:48,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-31 02:58:48,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:52,070 INFO L130 PetriNetUnfolder]: 8196/13468 cut-off events. [2023-08-31 02:58:52,071 INFO L131 PetriNetUnfolder]: For 247820/248198 co-relation queries the response was YES. [2023-08-31 02:58:52,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111527 conditions, 13468 events. 8196/13468 cut-off events. For 247820/248198 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 95352 event pairs, 886 based on Foata normal form. 283/13670 useless extension candidates. Maximal degree in co-relation 111433. Up to 4670 conditions per place. [2023-08-31 02:58:52,267 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 1356 selfloop transitions, 291 changer transitions 0/1673 dead transitions. [2023-08-31 02:58:52,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1673 transitions, 23751 flow [2023-08-31 02:58:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:58:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:58:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1518 transitions. [2023-08-31 02:58:52,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-08-31 02:58:52,271 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1518 transitions. [2023-08-31 02:58:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1518 transitions. [2023-08-31 02:58:52,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:52,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1518 transitions. [2023-08-31 02:58:52,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.8) internal successors, (1518), 10 states have internal predecessors, (1518), 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) [2023-08-31 02:58:52,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 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) [2023-08-31 02:58:52,279 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 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) [2023-08-31 02:58:52,279 INFO L175 Difference]: Start difference. First operand has 214 places, 689 transitions, 8375 flow. Second operand 10 states and 1518 transitions. [2023-08-31 02:58:52,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1673 transitions, 23751 flow [2023-08-31 02:58:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1673 transitions, 23166 flow, removed 280 selfloop flow, removed 11 redundant places. [2023-08-31 02:58:53,156 INFO L231 Difference]: Finished difference. Result has 211 places, 857 transitions, 11735 flow [2023-08-31 02:58:53,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11735, PETRI_PLACES=211, PETRI_TRANSITIONS=857} [2023-08-31 02:58:53,157 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2023-08-31 02:58:53,157 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 857 transitions, 11735 flow [2023-08-31 02:58:53,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 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) [2023-08-31 02:58:53,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:53,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:53,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 02:58:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:53,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:53,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2087576016, now seen corresponding path program 4 times [2023-08-31 02:58:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:53,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018114704] [2023-08-31 02:58:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:58:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:58:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:58:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018114704] [2023-08-31 02:58:53,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018114704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:58:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322127841] [2023-08-31 02:58:53,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:58:53,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:53,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:58:53,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:58:53,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:58:53,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:58:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:58:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:58:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:58:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:58:53,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:58:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:58:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322127841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:58:53,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:58:53,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-08-31 02:58:53,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682914262] [2023-08-31 02:58:53,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:58:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:58:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:58:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:58:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:58:53,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-08-31 02:58:53,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 857 transitions, 11735 flow. Second operand has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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) [2023-08-31 02:58:53,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:58:53,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-08-31 02:58:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:58:57,437 INFO L130 PetriNetUnfolder]: 8132/13843 cut-off events. [2023-08-31 02:58:57,437 INFO L131 PetriNetUnfolder]: For 305625/305625 co-relation queries the response was YES. [2023-08-31 02:58:57,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120985 conditions, 13843 events. 8132/13843 cut-off events. For 305625/305625 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100297 event pairs, 1010 based on Foata normal form. 594/14437 useless extension candidates. Maximal degree in co-relation 118446. Up to 4517 conditions per place. [2023-08-31 02:58:57,564 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 730 selfloop transitions, 172 changer transitions 83/985 dead transitions. [2023-08-31 02:58:57,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 985 transitions, 15496 flow [2023-08-31 02:58:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:58:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:58:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2023-08-31 02:58:57,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45211038961038963 [2023-08-31 02:58:57,567 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2023-08-31 02:58:57,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2023-08-31 02:58:57,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:58:57,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2023-08-31 02:58:57,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 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) [2023-08-31 02:58:57,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 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) [2023-08-31 02:58:57,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 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) [2023-08-31 02:58:57,573 INFO L175 Difference]: Start difference. First operand has 211 places, 857 transitions, 11735 flow. Second operand 7 states and 1114 transitions. [2023-08-31 02:58:57,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 985 transitions, 15496 flow [2023-08-31 02:58:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 985 transitions, 15093 flow, removed 136 selfloop flow, removed 9 redundant places. [2023-08-31 02:58:59,084 INFO L231 Difference]: Finished difference. Result has 205 places, 719 transitions, 10406 flow [2023-08-31 02:58:59,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10406, PETRI_PLACES=205, PETRI_TRANSITIONS=719} [2023-08-31 02:58:59,085 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-08-31 02:58:59,085 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 719 transitions, 10406 flow [2023-08-31 02:58:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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) [2023-08-31 02:58:59,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:58:59,086 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:58:59,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:58:59,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:58:59,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:58:59,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:58:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 377650720, now seen corresponding path program 5 times [2023-08-31 02:58:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:58:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881279530] [2023-08-31 02:58:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:58:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:58:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:59:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:59:00,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:59:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881279530] [2023-08-31 02:59:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881279530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:59:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799891585] [2023-08-31 02:59:00,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:59:00,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:59:00,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:59:00,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:59:00,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:59:00,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:59:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:59:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 02:59:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:59:00,854 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2023-08-31 02:59:00,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 38 [2023-08-31 02:59:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:59:01,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:59:01,306 INFO L321 Elim1Store]: treesize reduction 34, result has 60.0 percent of original size [2023-08-31 02:59:01,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 76 [2023-08-31 02:59:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:59:01,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799891585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:59:01,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:59:01,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-31 02:59:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881929961] [2023-08-31 02:59:01,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:59:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-31 02:59:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:59:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-31 02:59:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-08-31 02:59:03,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 352 [2023-08-31 02:59:03,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 719 transitions, 10406 flow. Second operand has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 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) [2023-08-31 02:59:03,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:59:03,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 352 [2023-08-31 02:59:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:59:09,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:59:16,462 INFO L130 PetriNetUnfolder]: 14209/25067 cut-off events. [2023-08-31 02:59:16,462 INFO L131 PetriNetUnfolder]: For 498437/498437 co-relation queries the response was YES. [2023-08-31 02:59:16,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221018 conditions, 25067 events. 14209/25067 cut-off events. For 498437/498437 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 207146 event pairs, 157 based on Foata normal form. 42/25109 useless extension candidates. Maximal degree in co-relation 218651. Up to 8140 conditions per place. [2023-08-31 02:59:16,965 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 1088 selfloop transitions, 1037 changer transitions 266/2391 dead transitions. [2023-08-31 02:59:16,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 2391 transitions, 42407 flow [2023-08-31 02:59:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-31 02:59:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-31 02:59:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 10091 transitions. [2023-08-31 02:59:16,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295128004179728 [2023-08-31 02:59:16,979 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 10091 transitions. [2023-08-31 02:59:16,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 10091 transitions. [2023-08-31 02:59:16,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:59:16,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 10091 transitions. [2023-08-31 02:59:16,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 115.98850574712644) internal successors, (10091), 87 states have internal predecessors, (10091), 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) [2023-08-31 02:59:17,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 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) [2023-08-31 02:59:17,009 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 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) [2023-08-31 02:59:17,009 INFO L175 Difference]: Start difference. First operand has 205 places, 719 transitions, 10406 flow. Second operand 87 states and 10091 transitions. [2023-08-31 02:59:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 2391 transitions, 42407 flow [2023-08-31 02:59:21,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 2391 transitions, 41838 flow, removed 259 selfloop flow, removed 2 redundant places. [2023-08-31 02:59:21,036 INFO L231 Difference]: Finished difference. Result has 325 places, 1438 transitions, 24735 flow [2023-08-31 02:59:21,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=10297, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=24735, PETRI_PLACES=325, PETRI_TRANSITIONS=1438} [2023-08-31 02:59:21,037 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 300 predicate places. [2023-08-31 02:59:21,037 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1438 transitions, 24735 flow [2023-08-31 02:59:21,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 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) [2023-08-31 02:59:21,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:59:21,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:59:21,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:59:21,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:59:21,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:59:21,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:59:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1445197890, now seen corresponding path program 6 times [2023-08-31 02:59:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:59:21,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914804162] [2023-08-31 02:59:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:59:21,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:59:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:59:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:59:22,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:59:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914804162] [2023-08-31 02:59:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914804162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:59:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851134120] [2023-08-31 02:59:22,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:59:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:59:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:59:22,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:59:22,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:59:22,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:59:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:59:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 02:59:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:59:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:59:22,913 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 02:59:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:59:22,997 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 02:59:23,179 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-31 02:59:23,180 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 10 [2023-08-31 02:59:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:59:23,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:59:27,604 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) (and (<= c_~N~0 c_~i~0) (<= c_~end~0 c_~start~0))) is different from false [2023-08-31 02:59:27,634 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) is different from false [2023-08-31 02:59:27,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:59:27,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1886 treesize of output 1758 [2023-08-31 02:59:27,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:59:27,897 INFO L350 Elim1Store]: Elim1 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 792 treesize of output 771 [2023-08-31 02:59:27,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:59:27,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 690 treesize of output 623 [2023-08-31 02:59:27,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:59:27,957 INFO L350 Elim1Store]: Elim1 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 582 treesize of output 503 [2023-08-31 02:59:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-08-31 02:59:53,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851134120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:59:53,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:59:53,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 32 [2023-08-31 02:59:53,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030361835] [2023-08-31 02:59:53,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:59:53,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 02:59:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:59:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 02:59:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=831, Unknown=2, NotChecked=122, Total=1122 [2023-08-31 02:59:53,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 352 [2023-08-31 02:59:53,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1438 transitions, 24735 flow. Second operand has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 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) [2023-08-31 02:59:53,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:59:53,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 352 [2023-08-31 02:59:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:00:08,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:00:15,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:00:39,997 INFO L130 PetriNetUnfolder]: 15848/27215 cut-off events. [2023-08-31 03:00:39,997 INFO L131 PetriNetUnfolder]: For 885120/885120 co-relation queries the response was YES. [2023-08-31 03:00:40,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286542 conditions, 27215 events. 15848/27215 cut-off events. For 885120/885120 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 217524 event pairs, 1284 based on Foata normal form. 14/27229 useless extension candidates. Maximal degree in co-relation 285626. Up to 9081 conditions per place. [2023-08-31 03:00:40,565 INFO L137 encePairwiseOnDemand]: 336/352 looper letters, 1264 selfloop transitions, 807 changer transitions 97/2168 dead transitions. [2023-08-31 03:00:40,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 2168 transitions, 43327 flow [2023-08-31 03:00:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-31 03:00:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-31 03:00:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4346 transitions. [2023-08-31 03:00:40,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24209001782531195 [2023-08-31 03:00:40,592 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4346 transitions. [2023-08-31 03:00:40,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4346 transitions. [2023-08-31 03:00:40,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:00:40,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4346 transitions. [2023-08-31 03:00:40,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 85.2156862745098) internal successors, (4346), 51 states have internal predecessors, (4346), 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) [2023-08-31 03:00:40,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 352.0) internal successors, (18304), 52 states have internal predecessors, (18304), 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) [2023-08-31 03:00:40,609 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 352.0) internal successors, (18304), 52 states have internal predecessors, (18304), 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) [2023-08-31 03:00:40,609 INFO L175 Difference]: Start difference. First operand has 325 places, 1438 transitions, 24735 flow. Second operand 51 states and 4346 transitions. [2023-08-31 03:00:40,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 2168 transitions, 43327 flow [2023-08-31 03:00:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 2168 transitions, 39629 flow, removed 1816 selfloop flow, removed 16 redundant places. [2023-08-31 03:00:52,473 INFO L231 Difference]: Finished difference. Result has 364 places, 1735 transitions, 30211 flow [2023-08-31 03:00:52,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=22812, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=30211, PETRI_PLACES=364, PETRI_TRANSITIONS=1735} [2023-08-31 03:00:52,475 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 339 predicate places. [2023-08-31 03:00:52,475 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1735 transitions, 30211 flow [2023-08-31 03:00:52,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 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) [2023-08-31 03:00:52,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:00:52,477 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:00:52,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 03:00:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 03:00:52,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:00:52,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:00:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2087366540, now seen corresponding path program 7 times [2023-08-31 03:00:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:00:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538448883] [2023-08-31 03:00:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:00:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:00:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:00:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:00:53,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:00:53,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538448883] [2023-08-31 03:00:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538448883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:00:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491275010] [2023-08-31 03:00:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:00:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:00:53,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:00:53,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:00:53,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:00:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:00:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 03:00:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:00:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:00:54,170 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 03:00:54,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-31 03:00:54,176 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 15 [2023-08-31 03:00:54,264 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2023-08-31 03:00:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:00:54,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:00:54,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:00:54,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 94 treesize of output 135 [2023-08-31 03:00:54,536 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 36 [2023-08-31 03:00:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 03:00:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491275010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:00:54,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:00:54,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2023-08-31 03:00:54,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466757615] [2023-08-31 03:00:54,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:00:54,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:00:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:00:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:00:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 03:00:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 352 [2023-08-31 03:00:56,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1735 transitions, 30211 flow. Second operand has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 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) [2023-08-31 03:00:56,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:00:56,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 352 [2023-08-31 03:00:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:01:10,209 INFO L130 PetriNetUnfolder]: 17913/30707 cut-off events. [2023-08-31 03:01:10,209 INFO L131 PetriNetUnfolder]: For 889789/889789 co-relation queries the response was YES. [2023-08-31 03:01:10,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314896 conditions, 30707 events. 17913/30707 cut-off events. For 889789/889789 co-relation queries the response was YES. Maximal size of possible extension queue 1218. Compared 249657 event pairs, 613 based on Foata normal form. 14/30721 useless extension candidates. Maximal degree in co-relation 314749. Up to 10841 conditions per place. [2023-08-31 03:01:10,985 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1232 selfloop transitions, 933 changer transitions 97/2262 dead transitions. [2023-08-31 03:01:10,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2262 transitions, 44834 flow [2023-08-31 03:01:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:01:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:01:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2000 transitions. [2023-08-31 03:01:10,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342245989304813 [2023-08-31 03:01:10,988 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2000 transitions. [2023-08-31 03:01:10,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2000 transitions. [2023-08-31 03:01:10,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:01:10,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2000 transitions. [2023-08-31 03:01:10,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.6470588235294) internal successors, (2000), 17 states have internal predecessors, (2000), 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) [2023-08-31 03:01:10,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 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) [2023-08-31 03:01:10,993 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 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) [2023-08-31 03:01:10,993 INFO L175 Difference]: Start difference. First operand has 364 places, 1735 transitions, 30211 flow. Second operand 17 states and 2000 transitions. [2023-08-31 03:01:10,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2262 transitions, 44834 flow [2023-08-31 03:01:23,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 2262 transitions, 44502 flow, removed 144 selfloop flow, removed 13 redundant places. [2023-08-31 03:01:23,530 INFO L231 Difference]: Finished difference. Result has 371 places, 1858 transitions, 35524 flow [2023-08-31 03:01:23,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=29939, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=35524, PETRI_PLACES=371, PETRI_TRANSITIONS=1858} [2023-08-31 03:01:23,531 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 346 predicate places. [2023-08-31 03:01:23,532 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1858 transitions, 35524 flow [2023-08-31 03:01:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 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) [2023-08-31 03:01:23,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:01:23,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:01:23,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 03:01:23,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 03:01:23,738 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:01:23,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:01:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash -517867998, now seen corresponding path program 8 times [2023-08-31 03:01:23,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:01:23,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072817613] [2023-08-31 03:01:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:01:23,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:01:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:01:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:01:24,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:01:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072817613] [2023-08-31 03:01:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072817613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:01:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665076482] [2023-08-31 03:01:24,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:01:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:01:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:01:24,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:01:24,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:01:24,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:01:24,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:01:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 03:01:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:01:25,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:01:25,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:01:25,187 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:01:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:01:25,252 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:01:25,410 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-31 03:01:25,411 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 10 [2023-08-31 03:01:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:01:25,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:01:29,909 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 (+ .cse1 ~queue~0.offset)) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse4 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) is different from false [2023-08-31 03:01:29,971 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse2 (+ (* c_~i~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse0 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))))) (not (= (mod c_~ok~0 256) 0))) (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (not (= (select .cse3 (+ .cse1 ~queue~0.offset)) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))) (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1)))))))) is different from false [2023-08-31 03:01:29,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:29,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-31 03:01:29,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:29,995 INFO L350 Elim1Store]: Elim1 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 422 treesize of output 378 [2023-08-31 03:01:30,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,009 INFO L350 Elim1Store]: Elim1 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 358 treesize of output 279 [2023-08-31 03:01:30,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,023 INFO L350 Elim1Store]: Elim1 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 262 treesize of output 231 [2023-08-31 03:01:30,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2023-08-31 03:01:30,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,269 INFO L350 Elim1Store]: Elim1 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 979 treesize of output 951 [2023-08-31 03:01:30,355 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-31 03:01:30,355 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 672 [2023-08-31 03:01:30,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 569 treesize of output 543 [2023-08-31 03:01:30,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:01:30,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 586 treesize of output 494 [2023-08-31 03:01:34,453 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-08-31 03:01:34,454 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 53 [2023-08-31 03:01:34,481 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-08-31 03:01:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-31 03:01:34,518 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-08-31 03:01:34,518 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 53 [2023-08-31 03:01:34,540 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:01:34,540 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-08-31 03:01:34,551 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-31 03:01:34,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2023-08-31 03:01:34,558 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:01:34,558 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 1 [2023-08-31 03:01:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2023-08-31 03:01:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665076482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:01:34,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:01:34,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 34 [2023-08-31 03:01:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898479587] [2023-08-31 03:01:34,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:01:34,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:01:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:01:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:01:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=942, Unknown=3, NotChecked=130, Total=1260 [2023-08-31 03:01:34,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-08-31 03:01:34,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1858 transitions, 35524 flow. Second operand has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 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) [2023-08-31 03:01:34,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:01:34,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-08-31 03:01:34,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:01:52,557 INFO L130 PetriNetUnfolder]: 19430/32918 cut-off events. [2023-08-31 03:01:52,558 INFO L131 PetriNetUnfolder]: For 1067769/1067769 co-relation queries the response was YES. [2023-08-31 03:01:53,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356863 conditions, 32918 events. 19430/32918 cut-off events. For 1067769/1067769 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 264673 event pairs, 1099 based on Foata normal form. 14/32932 useless extension candidates. Maximal degree in co-relation 356686. Up to 11739 conditions per place. [2023-08-31 03:01:53,600 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1314 selfloop transitions, 1049 changer transitions 91/2454 dead transitions. [2023-08-31 03:01:53,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 2454 transitions, 51635 flow [2023-08-31 03:01:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:01:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:01:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2526 transitions. [2023-08-31 03:01:53,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562905844155844 [2023-08-31 03:01:53,603 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2526 transitions. [2023-08-31 03:01:53,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2526 transitions. [2023-08-31 03:01:53,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:01:53,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2526 transitions. [2023-08-31 03:01:53,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 90.21428571428571) internal successors, (2526), 28 states have internal predecessors, (2526), 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) [2023-08-31 03:01:53,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 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) [2023-08-31 03:01:53,611 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 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) [2023-08-31 03:01:53,611 INFO L175 Difference]: Start difference. First operand has 371 places, 1858 transitions, 35524 flow. Second operand 28 states and 2526 transitions. [2023-08-31 03:01:53,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 2454 transitions, 51635 flow [2023-08-31 03:02:10,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2454 transitions, 50799 flow, removed 243 selfloop flow, removed 12 redundant places. [2023-08-31 03:02:10,543 INFO L231 Difference]: Finished difference. Result has 390 places, 2041 transitions, 42022 flow [2023-08-31 03:02:10,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=35025, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=42022, PETRI_PLACES=390, PETRI_TRANSITIONS=2041} [2023-08-31 03:02:10,545 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 365 predicate places. [2023-08-31 03:02:10,545 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 2041 transitions, 42022 flow [2023-08-31 03:02:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 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) [2023-08-31 03:02:10,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:02:10,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:02:10,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:02:10,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:02:10,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:02:10,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:02:10,751 INFO L85 PathProgramCache]: Analyzing trace with hash 152669718, now seen corresponding path program 9 times [2023-08-31 03:02:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:02:10,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049568998] [2023-08-31 03:02:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:02:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:02:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:02:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 03:02:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:02:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049568998] [2023-08-31 03:02:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049568998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:02:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980127774] [2023-08-31 03:02:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:02:10,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:02:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:02:10,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:02:10,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:02:10,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:02:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:02:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:02:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:02:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:02:11,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:02:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:02:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980127774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:02:11,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:02:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-31 03:02:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747780261] [2023-08-31 03:02:11,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:02:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 03:02:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:02:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 03:02:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-31 03:02:11,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 352 [2023-08-31 03:02:11,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 2041 transitions, 42022 flow. Second operand has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 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) [2023-08-31 03:02:11,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:02:11,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 352 [2023-08-31 03:02:11,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:02:23,983 INFO L130 PetriNetUnfolder]: 13393/23562 cut-off events. [2023-08-31 03:02:23,984 INFO L131 PetriNetUnfolder]: For 867076/867146 co-relation queries the response was YES. [2023-08-31 03:02:24,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262327 conditions, 23562 events. 13393/23562 cut-off events. For 867076/867146 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 187481 event pairs, 750 based on Foata normal form. 1080/24613 useless extension candidates. Maximal degree in co-relation 262153. Up to 12123 conditions per place. [2023-08-31 03:02:24,264 INFO L137 encePairwiseOnDemand]: 341/352 looper letters, 998 selfloop transitions, 115 changer transitions 1055/2243 dead transitions. [2023-08-31 03:02:24,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2243 transitions, 48334 flow [2023-08-31 03:02:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:02:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:02:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3715 transitions. [2023-08-31 03:02:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059222027972028 [2023-08-31 03:02:24,267 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3715 transitions. [2023-08-31 03:02:24,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3715 transitions. [2023-08-31 03:02:24,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:02:24,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3715 transitions. [2023-08-31 03:02:24,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 142.8846153846154) internal successors, (3715), 26 states have internal predecessors, (3715), 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) [2023-08-31 03:02:24,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 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) [2023-08-31 03:02:24,275 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 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) [2023-08-31 03:02:24,275 INFO L175 Difference]: Start difference. First operand has 390 places, 2041 transitions, 42022 flow. Second operand 26 states and 3715 transitions. [2023-08-31 03:02:24,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2243 transitions, 48334 flow [2023-08-31 03:02:32,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2243 transitions, 46620 flow, removed 328 selfloop flow, removed 15 redundant places. [2023-08-31 03:02:32,682 INFO L231 Difference]: Finished difference. Result has 400 places, 1040 transitions, 21315 flow [2023-08-31 03:02:32,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=33452, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=21315, PETRI_PLACES=400, PETRI_TRANSITIONS=1040} [2023-08-31 03:02:32,684 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 375 predicate places. [2023-08-31 03:02:32,684 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1040 transitions, 21315 flow [2023-08-31 03:02:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 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) [2023-08-31 03:02:32,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:02:32,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:02:32,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 03:02:32,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 03:02:32,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:02:32,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:02:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1092451830, now seen corresponding path program 10 times [2023-08-31 03:02:32,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:02:32,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158499514] [2023-08-31 03:02:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:02:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:02:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:02:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:02:34,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:02:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158499514] [2023-08-31 03:02:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158499514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:02:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788894864] [2023-08-31 03:02:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:02:34,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:02:34,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:02:34,390 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:02:34,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:02:34,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:02:34,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:02:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-31 03:02:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:02:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:02:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:02:34,534 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 03:02:34,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-31 03:02:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:02:34,677 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:02:34,677 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:02:34,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:02:34,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:02:34,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:02:34,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:02:36,241 INFO L321 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2023-08-31 03:02:36,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 82 treesize of output 65 [2023-08-31 03:02:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:02:36,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:02:38,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:02:38,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 167 [2023-08-31 03:02:38,309 INFO L321 Elim1Store]: treesize reduction 13, result has 93.5 percent of original size [2023-08-31 03:02:38,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 7507 treesize of output 7117 [2023-08-31 03:02:38,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:38,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:02:38,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 3550 treesize of output 2810 [2023-08-31 03:02:38,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:38,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:02:38,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2650 treesize of output 2360 [2023-08-31 03:02:39,012 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:02:39,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:02:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2098 treesize of output 2033 Killed by 15