./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:00:16,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:00:16,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:00:16,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:00:16,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:00:16,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:00:16,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:00:16,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:00:16,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:00:16,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:00:16,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:00:16,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:00:16,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:00:16,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:00:16,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:00:16,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:00:16,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:00:16,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:00:16,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:00:16,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:00:16,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:00:16,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:00:16,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:00:16,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:00:16,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:00:16,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:00:16,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:00:16,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:00:16,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:00:16,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:00:16,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:00:16,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:00:16,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:00:16,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:00:16,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:00:16,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:00:16,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:00:16,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:00:16,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:00:16,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:00:16,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:00:16,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:00:16,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:00:16,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:00:16,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:00:16,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:00:16,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:00:16,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:00:16,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:00:16,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:00:16,220 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:00:16,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:00:16,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:00:16,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:00:16,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:00:16,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:00:16,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:00:16,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:00:16,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:00:16,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:00:16,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:00:16,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:00:16,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:00:16,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:00:16,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:00:16,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:00:16,224 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:00:16,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:00:16,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:00:16,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:00:16,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2021-12-17 23:00:16,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:00:16,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:00:16,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:00:16,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:00:16,466 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:00:16,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-17 23:00:16,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b47739c4d/20a0745a4ca849f3b8cefb11f296e174/FLAG8dffcb48d [2021-12-17 23:00:16,895 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:00:16,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-17 23:00:16,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b47739c4d/20a0745a4ca849f3b8cefb11f296e174/FLAG8dffcb48d [2021-12-17 23:00:16,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b47739c4d/20a0745a4ca849f3b8cefb11f296e174 [2021-12-17 23:00:16,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:00:16,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:00:16,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:00:16,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:00:16,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:00:16,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:00:16" (1/1) ... [2021-12-17 23:00:16,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e123b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:16, skipping insertion in model container [2021-12-17 23:00:16,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:00:16" (1/1) ... [2021-12-17 23:00:16,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:00:16,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:00:17,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-17 23:00:17,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:00:17,155 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:00:17,185 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-17 23:00:17,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:00:17,205 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:00:17,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17 WrapperNode [2021-12-17 23:00:17,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:00:17,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:00:17,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:00:17,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:00:17,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,260 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2021-12-17 23:00:17,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:00:17,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:00:17,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:00:17,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:00:17,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:00:17,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:00:17,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:00:17,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:00:17,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (1/1) ... [2021-12-17 23:00:17,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:00:17,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:00:17,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 23:00:17,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 23:00:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:00:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:00:17,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:00:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:00:17,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:00:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:00:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:00:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:00:17,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:00:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:00:17,413 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:00:17,507 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:00:17,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:00:17,771 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:00:17,844 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:00:17,849 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 23:00:17,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:00:17 BoogieIcfgContainer [2021-12-17 23:00:17,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:00:17,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:00:17,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:00:17,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:00:17,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:00:16" (1/3) ... [2021-12-17 23:00:17,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78578cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:00:17, skipping insertion in model container [2021-12-17 23:00:17,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:00:17" (2/3) ... [2021-12-17 23:00:17,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78578cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:00:17, skipping insertion in model container [2021-12-17 23:00:17,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:00:17" (3/3) ... [2021-12-17 23:00:17,859 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2021-12-17 23:00:17,864 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:00:17,864 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:00:17,864 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:00:17,865 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:00:17,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:00:17,921 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 23:00:17,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:00:17,974 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:00:17,975 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 23:00:17,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2021-12-17 23:00:18,046 INFO L129 PetriNetUnfolder]: 15/187 cut-off events. [2021-12-17 23:00:18,051 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:00:18,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2021-12-17 23:00:18,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2021-12-17 23:00:18,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2021-12-17 23:00:18,102 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-12-17 23:00:18,102 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:00:18,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:18,104 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:18,104 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1982625687, now seen corresponding path program 1 times [2021-12-17 23:00:18,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:18,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157354745] [2021-12-17 23:00:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:18,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:00:18,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157354745] [2021-12-17 23:00:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157354745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:18,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:18,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:00:18,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890771449] [2021-12-17 23:00:18,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:18,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:00:18,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:00:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:00:18,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 189 [2021-12-17 23:00:18,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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) [2021-12-17 23:00:18,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:18,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 189 [2021-12-17 23:00:18,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:18,508 INFO L129 PetriNetUnfolder]: 14/193 cut-off events. [2021-12-17 23:00:18,508 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-17 23:00:18,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 193 events. 14/193 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 3 based on Foata normal form. 15/195 useless extension candidates. Maximal degree in co-relation 147. Up to 20 conditions per place. [2021-12-17 23:00:18,510 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 7 selfloop transitions, 0 changer transitions 6/168 dead transitions. [2021-12-17 23:00:18,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 362 flow [2021-12-17 23:00:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:00:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:00:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 359 transitions. [2021-12-17 23:00:18,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9497354497354498 [2021-12-17 23:00:18,533 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 359 transitions. [2021-12-17 23:00:18,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 359 transitions. [2021-12-17 23:00:18,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:18,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 359 transitions. [2021-12-17 23:00:18,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 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) [2021-12-17 23:00:18,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2021-12-17 23:00:18,549 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2021-12-17 23:00:18,550 INFO L186 Difference]: Start difference. First operand has 170 places, 178 transitions, 368 flow. Second operand 2 states and 359 transitions. [2021-12-17 23:00:18,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 362 flow [2021-12-17 23:00:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:00:18,558 INFO L242 Difference]: Finished difference. Result has 167 places, 162 transitions, 328 flow [2021-12-17 23:00:18,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2021-12-17 23:00:18,563 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2021-12-17 23:00:18,563 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 328 flow [2021-12-17 23:00:18,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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) [2021-12-17 23:00:18,564 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:18,564 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:18,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:00:18,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -955987473, now seen corresponding path program 1 times [2021-12-17 23:00:18,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097161795] [2021-12-17 23:00:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:18,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:00:18,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097161795] [2021-12-17 23:00:18,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097161795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:18,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:18,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:00:18,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867991582] [2021-12-17 23:00:18,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:18,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:00:18,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:00:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:00:18,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 189 [2021-12-17 23:00:18,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 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) [2021-12-17 23:00:18,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:18,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 189 [2021-12-17 23:00:18,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:18,901 INFO L129 PetriNetUnfolder]: 22/216 cut-off events. [2021-12-17 23:00:18,901 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-17 23:00:18,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 216 events. 22/216 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 296 event pairs, 3 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 283. Up to 38 conditions per place. [2021-12-17 23:00:18,904 INFO L132 encePairwiseOnDemand]: 184/189 looper letters, 37 selfloop transitions, 2 changer transitions 4/171 dead transitions. [2021-12-17 23:00:18,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 171 transitions, 434 flow [2021-12-17 23:00:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:00:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:00:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2021-12-17 23:00:18,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7767195767195767 [2021-12-17 23:00:18,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2021-12-17 23:00:18,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2021-12-17 23:00:18,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:18,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2021-12-17 23:00:18,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 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) [2021-12-17 23:00:18,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 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) [2021-12-17 23:00:18,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 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) [2021-12-17 23:00:18,913 INFO L186 Difference]: Start difference. First operand has 167 places, 162 transitions, 328 flow. Second operand 5 states and 734 transitions. [2021-12-17 23:00:18,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 171 transitions, 434 flow [2021-12-17 23:00:18,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 171 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:00:18,920 INFO L242 Difference]: Finished difference. Result has 168 places, 163 transitions, 344 flow [2021-12-17 23:00:18,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2021-12-17 23:00:18,922 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -2 predicate places. [2021-12-17 23:00:18,922 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 344 flow [2021-12-17 23:00:18,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 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) [2021-12-17 23:00:18,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:18,923 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:18,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:00:18,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1493556367, now seen corresponding path program 1 times [2021-12-17 23:00:18,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:18,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905175328] [2021-12-17 23:00:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:18,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:00:19,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905175328] [2021-12-17 23:00:19,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905175328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:19,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:19,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:00:19,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660017136] [2021-12-17 23:00:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:19,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:00:19,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:00:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:00:19,046 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 189 [2021-12-17 23:00:19,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 344 flow. Second operand has 5 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) [2021-12-17 23:00:19,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:19,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 189 [2021-12-17 23:00:19,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:19,179 INFO L129 PetriNetUnfolder]: 103/466 cut-off events. [2021-12-17 23:00:19,179 INFO L130 PetriNetUnfolder]: For 21/25 co-relation queries the response was YES. [2021-12-17 23:00:19,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 466 events. 103/466 cut-off events. For 21/25 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1727 event pairs, 21 based on Foata normal form. 8/419 useless extension candidates. Maximal degree in co-relation 700. Up to 81 conditions per place. [2021-12-17 23:00:19,183 INFO L132 encePairwiseOnDemand]: 181/189 looper letters, 34 selfloop transitions, 9 changer transitions 10/192 dead transitions. [2021-12-17 23:00:19,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 192 transitions, 516 flow [2021-12-17 23:00:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:00:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:00:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2021-12-17 23:00:19,189 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8641975308641975 [2021-12-17 23:00:19,189 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2021-12-17 23:00:19,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2021-12-17 23:00:19,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:19,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2021-12-17 23:00:19,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 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) [2021-12-17 23:00:19,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 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) [2021-12-17 23:00:19,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 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) [2021-12-17 23:00:19,194 INFO L186 Difference]: Start difference. First operand has 168 places, 163 transitions, 344 flow. Second operand 6 states and 980 transitions. [2021-12-17 23:00:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 192 transitions, 516 flow [2021-12-17 23:00:19,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 192 transitions, 510 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 23:00:19,199 INFO L242 Difference]: Finished difference. Result has 171 places, 170 transitions, 396 flow [2021-12-17 23:00:19,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2021-12-17 23:00:19,201 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 1 predicate places. [2021-12-17 23:00:19,201 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 396 flow [2021-12-17 23:00:19,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2021-12-17 23:00:19,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:19,202 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:19,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:00:19,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1590314738, now seen corresponding path program 1 times [2021-12-17 23:00:19,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694578795] [2021-12-17 23:00:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:00:19,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694578795] [2021-12-17 23:00:19,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694578795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:19,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:19,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:00:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426547565] [2021-12-17 23:00:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:00:19,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:00:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:00:19,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 189 [2021-12-17 23:00:19,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 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) [2021-12-17 23:00:19,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:19,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 189 [2021-12-17 23:00:19,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:19,444 INFO L129 PetriNetUnfolder]: 31/373 cut-off events. [2021-12-17 23:00:19,444 INFO L130 PetriNetUnfolder]: For 74/88 co-relation queries the response was YES. [2021-12-17 23:00:19,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 373 events. 31/373 cut-off events. For 74/88 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 961 event pairs, 8 based on Foata normal form. 6/367 useless extension candidates. Maximal degree in co-relation 560. Up to 47 conditions per place. [2021-12-17 23:00:19,447 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 31 selfloop transitions, 8 changer transitions 18/192 dead transitions. [2021-12-17 23:00:19,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 192 transitions, 562 flow [2021-12-17 23:00:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:00:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 23:00:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2021-12-17 23:00:19,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8001175778953556 [2021-12-17 23:00:19,450 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2021-12-17 23:00:19,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2021-12-17 23:00:19,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:19,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2021-12-17 23:00:19,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 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) [2021-12-17 23:00:19,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2021-12-17 23:00:19,457 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2021-12-17 23:00:19,457 INFO L186 Difference]: Start difference. First operand has 171 places, 170 transitions, 396 flow. Second operand 9 states and 1361 transitions. [2021-12-17 23:00:19,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 192 transitions, 562 flow [2021-12-17 23:00:19,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 192 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:00:19,461 INFO L242 Difference]: Finished difference. Result has 181 places, 171 transitions, 424 flow [2021-12-17 23:00:19,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=181, PETRI_TRANSITIONS=171} [2021-12-17 23:00:19,462 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 11 predicate places. [2021-12-17 23:00:19,463 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 171 transitions, 424 flow [2021-12-17 23:00:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 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) [2021-12-17 23:00:19,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:19,463 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:19,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:00:19,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash -496358003, now seen corresponding path program 1 times [2021-12-17 23:00:19,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:19,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090324392] [2021-12-17 23:00:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:19,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:00:19,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090324392] [2021-12-17 23:00:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090324392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:19,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:19,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:00:19,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898436652] [2021-12-17 23:00:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:19,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:00:19,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:00:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:00:19,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 189 [2021-12-17 23:00:19,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 171 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 142.28571428571428) internal successors, (996), 7 states have internal predecessors, (996), 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) [2021-12-17 23:00:19,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:19,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 189 [2021-12-17 23:00:19,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:19,800 INFO L129 PetriNetUnfolder]: 93/578 cut-off events. [2021-12-17 23:00:19,800 INFO L130 PetriNetUnfolder]: For 196/200 co-relation queries the response was YES. [2021-12-17 23:00:19,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 578 events. 93/578 cut-off events. For 196/200 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2599 event pairs, 19 based on Foata normal form. 4/555 useless extension candidates. Maximal degree in co-relation 1052. Up to 137 conditions per place. [2021-12-17 23:00:19,804 INFO L132 encePairwiseOnDemand]: 178/189 looper letters, 56 selfloop transitions, 9 changer transitions 13/201 dead transitions. [2021-12-17 23:00:19,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 201 transitions, 691 flow [2021-12-17 23:00:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:00:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 23:00:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1301 transitions. [2021-12-17 23:00:19,806 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7648442092886537 [2021-12-17 23:00:19,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1301 transitions. [2021-12-17 23:00:19,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1301 transitions. [2021-12-17 23:00:19,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:19,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1301 transitions. [2021-12-17 23:00:19,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 144.55555555555554) internal successors, (1301), 9 states have internal predecessors, (1301), 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) [2021-12-17 23:00:19,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2021-12-17 23:00:19,811 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2021-12-17 23:00:19,812 INFO L186 Difference]: Start difference. First operand has 181 places, 171 transitions, 424 flow. Second operand 9 states and 1301 transitions. [2021-12-17 23:00:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 201 transitions, 691 flow [2021-12-17 23:00:19,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 201 transitions, 671 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-17 23:00:19,817 INFO L242 Difference]: Finished difference. Result has 184 places, 174 transitions, 459 flow [2021-12-17 23:00:19,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=459, PETRI_PLACES=184, PETRI_TRANSITIONS=174} [2021-12-17 23:00:19,821 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 14 predicate places. [2021-12-17 23:00:19,821 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 174 transitions, 459 flow [2021-12-17 23:00:19,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.28571428571428) internal successors, (996), 7 states have internal predecessors, (996), 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) [2021-12-17 23:00:19,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:19,822 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:19,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:00:19,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1666740558, now seen corresponding path program 1 times [2021-12-17 23:00:19,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:19,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400207425] [2021-12-17 23:00:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:19,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:00:19,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400207425] [2021-12-17 23:00:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400207425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:00:19,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:00:19,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:00:19,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807696236] [2021-12-17 23:00:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:00:19,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:00:19,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:00:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:00:19,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 189 [2021-12-17 23:00:19,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 174 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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) [2021-12-17 23:00:19,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:19,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 189 [2021-12-17 23:00:19,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:20,087 INFO L129 PetriNetUnfolder]: 198/745 cut-off events. [2021-12-17 23:00:20,087 INFO L130 PetriNetUnfolder]: For 392/396 co-relation queries the response was YES. [2021-12-17 23:00:20,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 745 events. 198/745 cut-off events. For 392/396 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3714 event pairs, 41 based on Foata normal form. 25/741 useless extension candidates. Maximal degree in co-relation 1605. Up to 127 conditions per place. [2021-12-17 23:00:20,094 INFO L132 encePairwiseOnDemand]: 184/189 looper letters, 36 selfloop transitions, 17 changer transitions 0/198 dead transitions. [2021-12-17 23:00:20,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 674 flow [2021-12-17 23:00:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:00:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:00:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 831 transitions. [2021-12-17 23:00:20,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8793650793650793 [2021-12-17 23:00:20,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 831 transitions. [2021-12-17 23:00:20,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 831 transitions. [2021-12-17 23:00:20,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:20,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 831 transitions. [2021-12-17 23:00:20,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 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) [2021-12-17 23:00:20,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 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) [2021-12-17 23:00:20,102 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 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) [2021-12-17 23:00:20,102 INFO L186 Difference]: Start difference. First operand has 184 places, 174 transitions, 459 flow. Second operand 5 states and 831 transitions. [2021-12-17 23:00:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 674 flow [2021-12-17 23:00:20,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 198 transitions, 653 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-17 23:00:20,108 INFO L242 Difference]: Finished difference. Result has 184 places, 183 transitions, 557 flow [2021-12-17 23:00:20,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=184, PETRI_TRANSITIONS=183} [2021-12-17 23:00:20,110 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 14 predicate places. [2021-12-17 23:00:20,110 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 183 transitions, 557 flow [2021-12-17 23:00:20,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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) [2021-12-17 23:00:20,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:20,111 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:00:20,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1403839526, now seen corresponding path program 2 times [2021-12-17 23:00:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:20,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427048514] [2021-12-17 23:00:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:20,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427048514] [2021-12-17 23:00:20,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427048514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:00:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616907274] [2021-12-17 23:00:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:00:20,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:20,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:00:20,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:00:20,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:00:20,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:00:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:00:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 23:00:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:00:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 23:00:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:22,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:00:23,275 INFO L354 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-17 23:00:23,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 49 [2021-12-17 23:00:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616907274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:00:24,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:00:24,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 18] total 54 [2021-12-17 23:00:24,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448866817] [2021-12-17 23:00:24,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:00:24,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 23:00:24,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 23:00:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2383, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 23:00:24,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 189 [2021-12-17 23:00:24,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 183 transitions, 557 flow. Second operand has 54 states, 54 states have (on average 70.0925925925926) internal successors, (3785), 54 states have internal predecessors, (3785), 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) [2021-12-17 23:00:24,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:24,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 189 [2021-12-17 23:00:24,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:28,792 INFO L129 PetriNetUnfolder]: 3450/7123 cut-off events. [2021-12-17 23:00:28,792 INFO L130 PetriNetUnfolder]: For 6763/6763 co-relation queries the response was YES. [2021-12-17 23:00:28,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19249 conditions, 7123 events. 3450/7123 cut-off events. For 6763/6763 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 58961 event pairs, 468 based on Foata normal form. 2/6842 useless extension candidates. Maximal degree in co-relation 19234. Up to 1624 conditions per place. [2021-12-17 23:00:28,834 INFO L132 encePairwiseOnDemand]: 146/189 looper letters, 412 selfloop transitions, 135 changer transitions 161/763 dead transitions. [2021-12-17 23:00:28,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 763 transitions, 4387 flow [2021-12-17 23:00:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-17 23:00:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-17 23:00:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5898 transitions. [2021-12-17 23:00:28,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38526357044875564 [2021-12-17 23:00:28,847 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5898 transitions. [2021-12-17 23:00:28,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5898 transitions. [2021-12-17 23:00:28,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:28,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5898 transitions. [2021-12-17 23:00:28,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 72.81481481481481) internal successors, (5898), 81 states have internal predecessors, (5898), 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) [2021-12-17 23:00:28,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 189.0) internal successors, (15498), 82 states have internal predecessors, (15498), 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) [2021-12-17 23:00:28,883 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 189.0) internal successors, (15498), 82 states have internal predecessors, (15498), 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) [2021-12-17 23:00:28,883 INFO L186 Difference]: Start difference. First operand has 184 places, 183 transitions, 557 flow. Second operand 81 states and 5898 transitions. [2021-12-17 23:00:28,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 763 transitions, 4387 flow [2021-12-17 23:00:28,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 763 transitions, 4387 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:00:28,906 INFO L242 Difference]: Finished difference. Result has 312 places, 306 transitions, 1742 flow [2021-12-17 23:00:28,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=1742, PETRI_PLACES=312, PETRI_TRANSITIONS=306} [2021-12-17 23:00:28,907 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 142 predicate places. [2021-12-17 23:00:28,907 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 306 transitions, 1742 flow [2021-12-17 23:00:28,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 70.0925925925926) internal successors, (3785), 54 states have internal predecessors, (3785), 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) [2021-12-17 23:00:28,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:28,909 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:28,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:00:29,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:29,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1442441672, now seen corresponding path program 3 times [2021-12-17 23:00:29,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679177152] [2021-12-17 23:00:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:29,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:29,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679177152] [2021-12-17 23:00:29,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679177152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:00:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485722195] [2021-12-17 23:00:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:00:29,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:00:29,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:00:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:00:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:00:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:00:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 23:00:29,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:00:30,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-17 23:00:30,506 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 23:00:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 23:00:30,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2021-12-17 23:00:31,279 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-17 23:00:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 23:00:31,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:00:31,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:00:31,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:00:32,039 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-12-17 23:00:32,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 13 [2021-12-17 23:00:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:00:32,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:00:35,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 131 treesize of output 95 [2021-12-17 23:00:35,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26612 treesize of output 24618 [2021-12-17 23:00:35,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:35,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24564 treesize of output 21540 [2021-12-17 23:00:35,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:35,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21492 treesize of output 15396 [2021-12-17 23:00:36,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:36,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15348 treesize of output 13860 [2021-12-17 23:00:36,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:00:36,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:00:36,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 23:00:36,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157739522] [2021-12-17 23:00:36,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:00:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 23:00:36,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 23:00:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=3479, Unknown=51, NotChecked=0, Total=4032 [2021-12-17 23:00:36,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 189 [2021-12-17 23:00:36,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 306 transitions, 1742 flow. Second operand has 23 states, 23 states have (on average 73.3913043478261) internal successors, (1688), 23 states have internal predecessors, (1688), 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) [2021-12-17 23:00:36,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:36,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 189 [2021-12-17 23:00:36,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:39,454 INFO L129 PetriNetUnfolder]: 3728/7479 cut-off events. [2021-12-17 23:00:39,454 INFO L130 PetriNetUnfolder]: For 63287/63716 co-relation queries the response was YES. [2021-12-17 23:00:39,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40052 conditions, 7479 events. 3728/7479 cut-off events. For 63287/63716 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 61545 event pairs, 853 based on Foata normal form. 14/7239 useless extension candidates. Maximal degree in co-relation 39988. Up to 2404 conditions per place. [2021-12-17 23:00:39,539 INFO L132 encePairwiseOnDemand]: 158/189 looper letters, 333 selfloop transitions, 53 changer transitions 10/462 dead transitions. [2021-12-17 23:00:39,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 462 transitions, 3718 flow [2021-12-17 23:00:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:00:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:00:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2312 transitions. [2021-12-17 23:00:39,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4077601410934744 [2021-12-17 23:00:39,543 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2312 transitions. [2021-12-17 23:00:39,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2312 transitions. [2021-12-17 23:00:39,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:39,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2312 transitions. [2021-12-17 23:00:39,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 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) [2021-12-17 23:00:39,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 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) [2021-12-17 23:00:39,553 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 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) [2021-12-17 23:00:39,553 INFO L186 Difference]: Start difference. First operand has 312 places, 306 transitions, 1742 flow. Second operand 30 states and 2312 transitions. [2021-12-17 23:00:39,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 462 transitions, 3718 flow [2021-12-17 23:00:39,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 462 transitions, 3455 flow, removed 119 selfloop flow, removed 22 redundant places. [2021-12-17 23:00:39,660 INFO L242 Difference]: Finished difference. Result has 301 places, 320 transitions, 1907 flow [2021-12-17 23:00:39,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1907, PETRI_PLACES=301, PETRI_TRANSITIONS=320} [2021-12-17 23:00:39,661 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 131 predicate places. [2021-12-17 23:00:39,661 INFO L470 AbstractCegarLoop]: Abstraction has has 301 places, 320 transitions, 1907 flow [2021-12-17 23:00:39,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.3913043478261) internal successors, (1688), 23 states have internal predecessors, (1688), 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) [2021-12-17 23:00:39,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:39,662 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:39,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:00:39,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 23:00:39,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash -353593456, now seen corresponding path program 4 times [2021-12-17 23:00:39,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:39,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248447222] [2021-12-17 23:00:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:39,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:40,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248447222] [2021-12-17 23:00:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248447222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:00:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633090984] [2021-12-17 23:00:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:00:40,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:00:40,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:00:40,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:00:40,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:00:40,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:00:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 23:00:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:00:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-17 23:00:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:00:41,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-17 23:00:41,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:00:42,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:00:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:00:42,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:00:42,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-12-17 23:00:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:00:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:00:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:00:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:00:44,211 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:00:44,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2021-12-17 23:00:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:44,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:00:53,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 92 [2021-12-17 23:00:53,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:53,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40308 treesize of output 36778 [2021-12-17 23:00:53,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:53,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36724 treesize of output 29092 [2021-12-17 23:00:53,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29044 treesize of output 26404 [2021-12-17 23:00:53,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:00:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26356 treesize of output 21028 [2021-12-17 23:00:53,624 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:00:53,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:00:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-17 23:00:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447463393] [2021-12-17 23:00:53,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:00:53,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:00:53,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:00:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:00:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=6225, Unknown=67, NotChecked=0, Total=6972 [2021-12-17 23:00:53,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 189 [2021-12-17 23:00:53,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 320 transitions, 1907 flow. Second operand has 30 states, 30 states have (on average 66.5) internal successors, (1995), 30 states have internal predecessors, (1995), 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) [2021-12-17 23:00:53,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:00:53,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 189 [2021-12-17 23:00:53,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:00:57,580 INFO L129 PetriNetUnfolder]: 4410/8797 cut-off events. [2021-12-17 23:00:57,581 INFO L130 PetriNetUnfolder]: For 62127/62575 co-relation queries the response was YES. [2021-12-17 23:00:57,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44709 conditions, 8797 events. 4410/8797 cut-off events. For 62127/62575 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 75024 event pairs, 997 based on Foata normal form. 14/8525 useless extension candidates. Maximal degree in co-relation 44654. Up to 2308 conditions per place. [2021-12-17 23:00:57,671 INFO L132 encePairwiseOnDemand]: 150/189 looper letters, 337 selfloop transitions, 72 changer transitions 10/481 dead transitions. [2021-12-17 23:00:57,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 481 transitions, 3880 flow [2021-12-17 23:00:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:00:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:00:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2651 transitions. [2021-12-17 23:00:57,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3691172375382902 [2021-12-17 23:00:57,677 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2651 transitions. [2021-12-17 23:00:57,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2651 transitions. [2021-12-17 23:00:57,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:00:57,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2651 transitions. [2021-12-17 23:00:57,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 69.76315789473684) internal successors, (2651), 38 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:00:57,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 189.0) internal successors, (7371), 39 states have internal predecessors, (7371), 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) [2021-12-17 23:00:57,695 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 189.0) internal successors, (7371), 39 states have internal predecessors, (7371), 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) [2021-12-17 23:00:57,695 INFO L186 Difference]: Start difference. First operand has 301 places, 320 transitions, 1907 flow. Second operand 38 states and 2651 transitions. [2021-12-17 23:00:57,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 481 transitions, 3880 flow [2021-12-17 23:00:57,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 481 transitions, 3795 flow, removed 9 selfloop flow, removed 26 redundant places. [2021-12-17 23:00:57,800 INFO L242 Difference]: Finished difference. Result has 324 places, 338 transitions, 2209 flow [2021-12-17 23:00:57,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2209, PETRI_PLACES=324, PETRI_TRANSITIONS=338} [2021-12-17 23:00:57,801 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 154 predicate places. [2021-12-17 23:00:57,801 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 338 transitions, 2209 flow [2021-12-17 23:00:57,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 66.5) internal successors, (1995), 30 states have internal predecessors, (1995), 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) [2021-12-17 23:00:57,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:00:57,802 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:00:57,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:00:58,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:58,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:00:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:00:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1842335448, now seen corresponding path program 5 times [2021-12-17 23:00:58,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:00:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770141102] [2021-12-17 23:00:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:00:58,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:00:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:00:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:00:58,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:00:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770141102] [2021-12-17 23:00:58,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770141102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:00:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097591230] [2021-12-17 23:00:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:00:58,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:00:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:00:58,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:00:58,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:00:58,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:00:58,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:00:58,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 23:00:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:00:58,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-17 23:00:59,219 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 23:00:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 23:00:59,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2021-12-17 23:00:59,778 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-17 23:00:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 23:00:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:01:00,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:01:00,287 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-17 23:01:00,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-17 23:01:00,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-17 23:01:00,611 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 23:01:00,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 23:01:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:01:00,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:01:22,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 122 treesize of output 86 [2021-12-17 23:01:22,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:22,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8320 treesize of output 7393 [2021-12-17 23:01:22,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:22,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7393 treesize of output 5905 [2021-12-17 23:01:22,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5905 treesize of output 5185 [2021-12-17 23:01:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4093 treesize of output 3325 [2021-12-17 23:01:22,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:01:22,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:01:22,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-17 23:01:22,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934603497] [2021-12-17 23:01:22,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:01:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 23:01:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:01:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 23:01:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=4738, Unknown=45, NotChecked=0, Total=5256 [2021-12-17 23:01:22,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 189 [2021-12-17 23:01:22,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 338 transitions, 2209 flow. Second operand has 25 states, 25 states have (on average 65.24) internal successors, (1631), 25 states have internal predecessors, (1631), 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) [2021-12-17 23:01:22,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:01:22,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 189 [2021-12-17 23:01:22,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:01:25,975 INFO L129 PetriNetUnfolder]: 5120/10123 cut-off events. [2021-12-17 23:01:25,975 INFO L130 PetriNetUnfolder]: For 84814/85276 co-relation queries the response was YES. [2021-12-17 23:01:26,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54237 conditions, 10123 events. 5120/10123 cut-off events. For 84814/85276 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 87593 event pairs, 1192 based on Foata normal form. 14/9812 useless extension candidates. Maximal degree in co-relation 54170. Up to 2662 conditions per place. [2021-12-17 23:01:26,067 INFO L132 encePairwiseOnDemand]: 157/189 looper letters, 351 selfloop transitions, 66 changer transitions 10/489 dead transitions. [2021-12-17 23:01:26,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 489 transitions, 4226 flow [2021-12-17 23:01:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:01:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:01:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2153 transitions. [2021-12-17 23:01:26,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3674688513398191 [2021-12-17 23:01:26,072 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2153 transitions. [2021-12-17 23:01:26,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2153 transitions. [2021-12-17 23:01:26,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:01:26,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2153 transitions. [2021-12-17 23:01:26,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 69.45161290322581) internal successors, (2153), 31 states have internal predecessors, (2153), 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) [2021-12-17 23:01:26,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 189.0) internal successors, (6048), 32 states have internal predecessors, (6048), 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) [2021-12-17 23:01:26,083 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 189.0) internal successors, (6048), 32 states have internal predecessors, (6048), 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) [2021-12-17 23:01:26,083 INFO L186 Difference]: Start difference. First operand has 324 places, 338 transitions, 2209 flow. Second operand 31 states and 2153 transitions. [2021-12-17 23:01:26,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 489 transitions, 4226 flow [2021-12-17 23:01:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 489 transitions, 4141 flow, removed 13 selfloop flow, removed 23 redundant places. [2021-12-17 23:01:26,219 INFO L242 Difference]: Finished difference. Result has 334 places, 347 transitions, 2456 flow [2021-12-17 23:01:26,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2456, PETRI_PLACES=334, PETRI_TRANSITIONS=347} [2021-12-17 23:01:26,221 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 164 predicate places. [2021-12-17 23:01:26,221 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 347 transitions, 2456 flow [2021-12-17 23:01:26,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 65.24) internal successors, (1631), 25 states have internal predecessors, (1631), 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) [2021-12-17 23:01:26,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:01:26,221 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:01:26,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 23:01:26,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:01:26,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:01:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:01:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash 867329468, now seen corresponding path program 6 times [2021-12-17 23:01:26,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:01:26,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155270516] [2021-12-17 23:01:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:01:26,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:01:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:01:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:01:26,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:01:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155270516] [2021-12-17 23:01:26,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155270516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:01:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209567030] [2021-12-17 23:01:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 23:01:26,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:01:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:01:26,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:01:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:01:26,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 23:01:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:01:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 23:01:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:01:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:01:26,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:01:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:01:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209567030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:01:27,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:01:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2021-12-17 23:01:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269986327] [2021-12-17 23:01:27,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:01:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:01:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:01:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:01:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:01:27,298 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 189 [2021-12-17 23:01:27,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 347 transitions, 2456 flow. Second operand has 20 states, 20 states have (on average 132.7) internal successors, (2654), 20 states have internal predecessors, (2654), 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) [2021-12-17 23:01:27,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:01:27,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 189 [2021-12-17 23:01:27,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:01:29,314 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([538] L49-5-->L59: Formula: (= v_~i~0_15 (+ v_~i~0_16 1)) InVars {~i~0=v_~i~0_16} OutVars{thread1Thread1of1ForFork0_#t~post6#1=|v_thread1Thread1of1ForFork0_#t~post6#1_1|, ~i~0=v_~i~0_15} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post6#1, ~i~0][416], [Black: 1291#(and (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0) (= ~queue~0.offset 0) (= ~ok~0 1) (<= ~n~0 1) (= |ULTIMATE.start_create_fresh_int_array_#res#1.offset| 0) (<= ~start~0 ~end~0) (<= ~end~0 ~start~0) (= |ULTIMATE.start_main_#t~ret12#1.offset| 0) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1)), Black: 251#(< ~i~0 ~N~0), Black: 1289#(and (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0) (= ~ok~0 1) (<= ~n~0 1) (= 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|ULTIMATE.start_create_fresh_int_array_#res#1.offset| 0) (<= ~start~0 ~end~0) (<= ~end~0 ~start~0) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1)), Black: 1311#(and (= ~queue~0.offset 0) (= ~ok~0 1) (or (<= (+ (* 4 ~end~0) ~queue~0.offset) 0) (<= ~n~0 1)) (exists ((~A~0.offset Int) (v_~end~0_60 Int) (~A~0.base Int)) (and (< v_~end~0_60 1) (<= ~start~0 v_~end~0_60) (= (select (select |#memory_int| ~queue~0.base) (+ (* v_~end~0_60 4) ~queue~0.offset)) (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4)))) (<= 0 v_~end~0_60) (<= (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4))) ~v_old~0) (<= v_~end~0_60 ~start~0))) (< ~i~0 ~N~0) (or (<= (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4))) ~v_old~0) (not (= (* 4 ~start~0) (* 4 ~end~0)))) (= ~last~0 ~v_old~0) (or (not (= 0 (+ (* 4 ~end~0) ~queue~0.offset))) (= (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4))) |thread1Thread1of1ForFork0_#t~mem1#1|))), Black: 1281#(and (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0) (= ~ok~0 1) (= |ULTIMATE.start_create_fresh_int_array_#t~post22#1| 0) (<= ~start~0 ~end~0) (<= ~end~0 ~start~0) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1)), Black: 1287#(and (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0) (= ~ok~0 1) (<= ~n~0 1) (= |ULTIMATE.start_create_fresh_int_array_#res#1.offset| 0) (<= ~start~0 ~end~0) (<= ~end~0 ~start~0) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 1)), Black: 1361#(and (= ~ok~0 1) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~start~0 4) ~queue~0.offset)) ~v_old~0) (or (<= 1 ~end~0) (= (* 4 ~start~0) (* 4 ~end~0)) (< ~end~0 0))), Black: 701#(and (= ~queue~0.offset 0) (= ~ok~0 1) (= |thread2Thread1of1ForFork1_~cond~0#1| 1) (exists ((~A~0.offset Int) (v_~end~0_60 Int) (~i~0 Int) (~A~0.base Int)) (and (< v_~end~0_60 1) (<= ~start~0 v_~end~0_60) (= (select (select |#memory_int| ~queue~0.base) (+ (* v_~end~0_60 4) ~queue~0.offset)) (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4)))) (<= 0 v_~end~0_60) (<= (select (select |#memory_int| ~A~0.base) (+ ~A~0.offset (* ~i~0 4))) ~v_old~0) (<= v_~end~0_60 ~start~0))))]) [2021-12-17 23:01:29,314 INFO L384 tUnfolder$Statistics]: this new event has 169 ancestors and is cut-off event [2021-12-17 23:01:29,314 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2021-12-17 23:01:29,315 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2021-12-17 23:01:29,315 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2021-12-17 23:01:29,327 INFO L129 PetriNetUnfolder]: 3393/9878 cut-off events. [2021-12-17 23:01:29,327 INFO L130 PetriNetUnfolder]: For 78736/79608 co-relation queries the response was YES. [2021-12-17 23:01:29,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45795 conditions, 9878 events. 3393/9878 cut-off events. For 78736/79608 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 99677 event pairs, 1024 based on Foata normal form. 502/10021 useless extension candidates. Maximal degree in co-relation 45725. Up to 1584 conditions per place. [2021-12-17 23:01:29,450 INFO L132 encePairwiseOnDemand]: 166/189 looper letters, 159 selfloop transitions, 49 changer transitions 211/546 dead transitions. [2021-12-17 23:01:29,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 546 transitions, 4818 flow [2021-12-17 23:01:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:01:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:01:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3880 transitions. [2021-12-17 23:01:29,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7079000182448458 [2021-12-17 23:01:29,455 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3880 transitions. [2021-12-17 23:01:29,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3880 transitions. [2021-12-17 23:01:29,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:01:29,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3880 transitions. [2021-12-17 23:01:29,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 133.79310344827587) internal successors, (3880), 29 states have internal predecessors, (3880), 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) [2021-12-17 23:01:29,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 189.0) internal successors, (5670), 30 states have internal predecessors, (5670), 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) [2021-12-17 23:01:29,465 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 189.0) internal successors, (5670), 30 states have internal predecessors, (5670), 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) [2021-12-17 23:01:29,465 INFO L186 Difference]: Start difference. First operand has 334 places, 347 transitions, 2456 flow. Second operand 29 states and 3880 transitions. [2021-12-17 23:01:29,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 546 transitions, 4818 flow [2021-12-17 23:01:29,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 546 transitions, 4695 flow, removed 26 selfloop flow, removed 27 redundant places. [2021-12-17 23:01:29,608 INFO L242 Difference]: Finished difference. Result has 341 places, 273 transitions, 1655 flow [2021-12-17 23:01:29,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1655, PETRI_PLACES=341, PETRI_TRANSITIONS=273} [2021-12-17 23:01:29,609 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 171 predicate places. [2021-12-17 23:01:29,609 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 273 transitions, 1655 flow [2021-12-17 23:01:29,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 132.7) internal successors, (2654), 20 states have internal predecessors, (2654), 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) [2021-12-17 23:01:29,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:01:29,610 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:01:29,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:01:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 23:01:29,828 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:01:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:01:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2110115041, now seen corresponding path program 7 times [2021-12-17 23:01:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:01:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732334965] [2021-12-17 23:01:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:01:29,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:01:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:01:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:30,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:01:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732334965] [2021-12-17 23:01:30,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732334965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:01:30,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566120356] [2021-12-17 23:01:30,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 23:01:30,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:01:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:01:30,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:01:30,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:01:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:01:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 23:01:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:01:32,236 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:01:32,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2021-12-17 23:01:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:01:32,613 INFO L354 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-17 23:01:32,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 49 [2021-12-17 23:01:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566120356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:01:33,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:01:33,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 22] total 61 [2021-12-17 23:01:33,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164177423] [2021-12-17 23:01:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:01:33,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 23:01:33,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:01:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 23:01:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=3104, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 23:01:33,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 189 [2021-12-17 23:01:33,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 273 transitions, 1655 flow. Second operand has 61 states, 61 states have (on average 69.77049180327869) internal successors, (4256), 61 states have internal predecessors, (4256), 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) [2021-12-17 23:01:33,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:01:33,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 189 [2021-12-17 23:01:33,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:01:41,422 INFO L129 PetriNetUnfolder]: 10798/21421 cut-off events. [2021-12-17 23:01:41,422 INFO L130 PetriNetUnfolder]: For 203401/203816 co-relation queries the response was YES. [2021-12-17 23:01:41,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117456 conditions, 21421 events. 10798/21421 cut-off events. For 203401/203816 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 197453 event pairs, 1767 based on Foata normal form. 32/21363 useless extension candidates. Maximal degree in co-relation 117380. Up to 6324 conditions per place. [2021-12-17 23:01:41,692 INFO L132 encePairwiseOnDemand]: 140/189 looper letters, 510 selfloop transitions, 209 changer transitions 142/916 dead transitions. [2021-12-17 23:01:41,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 916 transitions, 9181 flow [2021-12-17 23:01:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-17 23:01:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-12-17 23:01:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5389 transitions. [2021-12-17 23:01:41,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3801763668430335 [2021-12-17 23:01:41,699 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5389 transitions. [2021-12-17 23:01:41,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5389 transitions. [2021-12-17 23:01:41,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:01:41,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5389 transitions. [2021-12-17 23:01:41,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 71.85333333333334) internal successors, (5389), 75 states have internal predecessors, (5389), 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) [2021-12-17 23:01:41,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 189.0) internal successors, (14364), 76 states have internal predecessors, (14364), 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) [2021-12-17 23:01:41,715 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 189.0) internal successors, (14364), 76 states have internal predecessors, (14364), 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) [2021-12-17 23:01:41,715 INFO L186 Difference]: Start difference. First operand has 341 places, 273 transitions, 1655 flow. Second operand 75 states and 5389 transitions. [2021-12-17 23:01:41,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 916 transitions, 9181 flow [2021-12-17 23:01:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 916 transitions, 7880 flow, removed 552 selfloop flow, removed 48 redundant places. [2021-12-17 23:01:42,550 INFO L242 Difference]: Finished difference. Result has 370 places, 447 transitions, 3875 flow [2021-12-17 23:01:42,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3875, PETRI_PLACES=370, PETRI_TRANSITIONS=447} [2021-12-17 23:01:42,551 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 200 predicate places. [2021-12-17 23:01:42,551 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 447 transitions, 3875 flow [2021-12-17 23:01:42,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 69.77049180327869) internal successors, (4256), 61 states have internal predecessors, (4256), 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) [2021-12-17 23:01:42,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:01:42,552 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:01:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:01:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:01:42,770 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:01:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:01:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1954724359, now seen corresponding path program 8 times [2021-12-17 23:01:42,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:01:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141669363] [2021-12-17 23:01:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:01:42,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:01:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:01:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:44,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:01:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141669363] [2021-12-17 23:01:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141669363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:01:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279922610] [2021-12-17 23:01:44,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:01:44,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:01:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:01:44,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:01:44,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:01:44,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:01:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:01:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 23:01:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:01:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:01:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 23:01:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:01:46,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 23:01:46,422 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 23:01:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-12-17 23:01:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:46,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:01:47,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:47,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1015 treesize of output 963 [2021-12-17 23:01:47,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:47,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 864 treesize of output 804 [2021-12-17 23:01:47,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:01:47,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 756 treesize of output 588 [2021-12-17 23:01:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:01:54,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279922610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:01:54,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:01:54,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 85 [2021-12-17 23:01:54,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555251901] [2021-12-17 23:01:54,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:01:54,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 23:01:54,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:01:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 23:01:54,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=6380, Unknown=6, NotChecked=0, Total=7140 [2021-12-17 23:01:54,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 189 [2021-12-17 23:01:54,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 447 transitions, 3875 flow. Second operand has 85 states, 85 states have (on average 61.694117647058825) internal successors, (5244), 85 states have internal predecessors, (5244), 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) [2021-12-17 23:01:54,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:01:54,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 189 [2021-12-17 23:01:54,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:02:20,855 INFO L129 PetriNetUnfolder]: 34248/64838 cut-off events. [2021-12-17 23:02:20,856 INFO L130 PetriNetUnfolder]: For 2059325/2059863 co-relation queries the response was YES. [2021-12-17 23:02:22,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 533639 conditions, 64838 events. 34248/64838 cut-off events. For 2059325/2059863 co-relation queries the response was YES. Maximal size of possible extension queue 2241. Compared 669465 event pairs, 5631 based on Foata normal form. 24/64708 useless extension candidates. Maximal degree in co-relation 533545. Up to 17391 conditions per place. [2021-12-17 23:02:22,715 INFO L132 encePairwiseOnDemand]: 131/189 looper letters, 1211 selfloop transitions, 710 changer transitions 199/2172 dead transitions. [2021-12-17 23:02:22,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 2172 transitions, 28793 flow [2021-12-17 23:02:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-17 23:02:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-12-17 23:02:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 8303 transitions. [2021-12-17 23:02:22,723 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.34591509394659004 [2021-12-17 23:02:22,723 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 8303 transitions. [2021-12-17 23:02:22,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 8303 transitions. [2021-12-17 23:02:22,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:02:22,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 8303 transitions. [2021-12-17 23:02:22,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 65.37795275590551) internal successors, (8303), 127 states have internal predecessors, (8303), 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) [2021-12-17 23:02:22,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 189.0) internal successors, (24192), 128 states have internal predecessors, (24192), 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) [2021-12-17 23:02:22,748 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 189.0) internal successors, (24192), 128 states have internal predecessors, (24192), 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) [2021-12-17 23:02:22,748 INFO L186 Difference]: Start difference. First operand has 370 places, 447 transitions, 3875 flow. Second operand 127 states and 8303 transitions. [2021-12-17 23:02:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 2172 transitions, 28793 flow [2021-12-17 23:02:31,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 2172 transitions, 25987 flow, removed 1389 selfloop flow, removed 30 redundant places. [2021-12-17 23:02:31,141 INFO L242 Difference]: Finished difference. Result has 515 places, 1083 transitions, 14239 flow [2021-12-17 23:02:31,142 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=14239, PETRI_PLACES=515, PETRI_TRANSITIONS=1083} [2021-12-17 23:02:31,142 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 345 predicate places. [2021-12-17 23:02:31,142 INFO L470 AbstractCegarLoop]: Abstraction has has 515 places, 1083 transitions, 14239 flow [2021-12-17 23:02:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 61.694117647058825) internal successors, (5244), 85 states have internal predecessors, (5244), 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) [2021-12-17 23:02:31,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:02:31,144 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:02:31,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 23:02:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:02:31,360 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:02:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:02:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1930933171, now seen corresponding path program 9 times [2021-12-17 23:02:31,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:02:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626412762] [2021-12-17 23:02:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:02:31,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:02:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:02:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:02:33,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:02:33,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626412762] [2021-12-17 23:02:33,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626412762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:02:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886095872] [2021-12-17 23:02:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:02:33,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:02:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:02:33,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:02:33,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:02:33,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:02:33,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:02:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 23:02:33,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:02:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:02:34,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:02:34,560 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:02:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2021-12-17 23:02:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 23:02:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:02:35,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:02:35,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 151 treesize of output 157 [2021-12-17 23:02:35,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:02:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 118 [2021-12-17 23:02:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 23:02:36,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886095872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:02:36,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:02:36,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 21] total 67 [2021-12-17 23:02:36,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455082404] [2021-12-17 23:02:36,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:02:36,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 23:02:36,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:02:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 23:02:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=4024, Unknown=5, NotChecked=0, Total=4422 [2021-12-17 23:02:36,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 189 [2021-12-17 23:02:36,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1083 transitions, 14239 flow. Second operand has 67 states, 67 states have (on average 65.25373134328358) internal successors, (4372), 67 states have internal predecessors, (4372), 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) [2021-12-17 23:02:36,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:02:36,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 189 [2021-12-17 23:02:36,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand