./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy7.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/test-easy7.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 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:19:02,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:19:02,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:19:02,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:19:02,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:19:02,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:19:02,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:19:02,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:19:02,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:19:02,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:19:02,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:19:02,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:19:02,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:19:02,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:19:02,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:19:02,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:19:02,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:19:02,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:19:02,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:19:02,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:19:02,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:19:02,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:19:02,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:19:02,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:19:02,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:19:02,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:19:02,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:19:02,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:19:02,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:19:02,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:19:02,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:19:02,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:19:02,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:19:02,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:19:02,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:19:02,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:19:02,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:19:02,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:19:02,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:19:02,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:19:02,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:19:02,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:19:02,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:19:02,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:19:02,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:19:02,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:19:02,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:19:02,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:19:02,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:19:02,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:19:02,193 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:19:02,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:19:02,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:19:02,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:19:02,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:19:02,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:19:02,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:19:02,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:19:02,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:19:02,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:19:02,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:19:02,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:19:02,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:19:02,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:19:02,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:19:02,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:19:02,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:19:02,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:19:02,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:19:02,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:19:02,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:19:02,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2021-12-17 23:19:02,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:19:02,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:19:02,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:19:02,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:19:02,441 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:19:02,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-17 23:19:02,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e0f1d67c/fb72a20992474bcf8c000bfdd19bb74d/FLAG16016457b [2021-12-17 23:19:02,892 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:19:02,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-17 23:19:02,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e0f1d67c/fb72a20992474bcf8c000bfdd19bb74d/FLAG16016457b [2021-12-17 23:19:02,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e0f1d67c/fb72a20992474bcf8c000bfdd19bb74d [2021-12-17 23:19:02,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:19:02,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:19:02,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:19:02,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:19:02,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:19:02,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:19:02" (1/1) ... [2021-12-17 23:19:02,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f37d242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:02, skipping insertion in model container [2021-12-17 23:19:02,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:19:02" (1/1) ... [2021-12-17 23:19:02,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:19:02,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:19:03,095 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/test-easy7.wvr.c[1872,1885] [2021-12-17 23:19:03,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:19:03,104 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:19:03,125 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/test-easy7.wvr.c[1872,1885] [2021-12-17 23:19:03,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:19:03,143 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:19:03,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03 WrapperNode [2021-12-17 23:19:03,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:19:03,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:19:03,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:19:03,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:19:03,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,188 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-17 23:19:03,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:19:03,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:19:03,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:19:03,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:19:03,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:19:03,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:19:03,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:19:03,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:19:03,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (1/1) ... [2021-12-17 23:19:03,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:19:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:03,234 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 23:19:03,236 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 23:19:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:19:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:19:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:19:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:19:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:19:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:19:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:19:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:19:03,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:19:03,265 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 23:19:03,322 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:19:03,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:19:03,493 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:19:03,500 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:19:03,501 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 23:19:03,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:19:03 BoogieIcfgContainer [2021-12-17 23:19:03,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:19:03,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:19:03,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:19:03,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:19:03,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:19:02" (1/3) ... [2021-12-17 23:19:03,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6a817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:19:03, skipping insertion in model container [2021-12-17 23:19:03,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:03" (2/3) ... [2021-12-17 23:19:03,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6a817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:19:03, skipping insertion in model container [2021-12-17 23:19:03,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:19:03" (3/3) ... [2021-12-17 23:19:03,513 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2021-12-17 23:19:03,517 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:19:03,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:19:03,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:19:03,518 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:19:03,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,557 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,558 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,559 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,560 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,563 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,574 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,577 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,577 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,577 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,577 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,577 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,578 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,580 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:03,584 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 23:19:03,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:19:03,627 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 23:19:03,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 23:19:03,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 204 flow [2021-12-17 23:19:03,693 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-12-17 23:19:03,696 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:19:03,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2021-12-17 23:19:03,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 204 flow [2021-12-17 23:19:03,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 83 transitions, 178 flow [2021-12-17 23:19:03,729 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-12-17 23:19:03,729 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:19:03,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:03,730 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] [2021-12-17 23:19:03,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 126118782, now seen corresponding path program 1 times [2021-12-17 23:19:03,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365404849] [2021-12-17 23:19:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:03,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:04,780 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 23:19:04,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:04,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365404849] [2021-12-17 23:19:04,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365404849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:04,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:04,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:04,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295665018] [2021-12-17 23:19:04,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:04,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:04,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:04,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:04,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:04,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:04,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:04,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:06,150 INFO L129 PetriNetUnfolder]: 179/513 cut-off events. [2021-12-17 23:19:06,150 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-12-17 23:19:06,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 513 events. 179/513 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2096 event pairs, 133 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 822. Up to 332 conditions per place. [2021-12-17 23:19:06,156 INFO L132 encePairwiseOnDemand]: 60/94 looper letters, 47 selfloop transitions, 28 changer transitions 34/148 dead transitions. [2021-12-17 23:19:06,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 535 flow [2021-12-17 23:19:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:19:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:19:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1583 transitions. [2021-12-17 23:19:06,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613475177304964 [2021-12-17 23:19:06,174 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1583 transitions. [2021-12-17 23:19:06,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1583 transitions. [2021-12-17 23:19:06,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:06,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1583 transitions. [2021-12-17 23:19:06,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.766666666666666) internal successors, (1583), 30 states have internal predecessors, (1583), 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 23:19:06,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:06,199 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:06,200 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 178 flow. Second operand 30 states and 1583 transitions. [2021-12-17 23:19:06,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 535 flow [2021-12-17 23:19:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 521 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:19:06,211 INFO L242 Difference]: Finished difference. Result has 136 places, 103 transitions, 360 flow [2021-12-17 23:19:06,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=360, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2021-12-17 23:19:06,216 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 48 predicate places. [2021-12-17 23:19:06,217 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 360 flow [2021-12-17 23:19:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:06,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:06,218 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] [2021-12-17 23:19:06,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:19:06,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1479619674, now seen corresponding path program 2 times [2021-12-17 23:19:06,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80284657] [2021-12-17 23:19:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:06,741 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 23:19:06,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:06,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80284657] [2021-12-17 23:19:06,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80284657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:06,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:06,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:19:06,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215007778] [2021-12-17 23:19:06,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:19:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:19:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:19:06,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:06,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:19:06,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:06,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:06,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:07,874 INFO L129 PetriNetUnfolder]: 202/559 cut-off events. [2021-12-17 23:19:07,874 INFO L130 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2021-12-17 23:19:07,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 559 events. 202/559 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2482 event pairs, 22 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 1515. Up to 329 conditions per place. [2021-12-17 23:19:07,879 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 82 selfloop transitions, 42 changer transitions 36/199 dead transitions. [2021-12-17 23:19:07,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 1049 flow [2021-12-17 23:19:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:19:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:19:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1561 transitions. [2021-12-17 23:19:07,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5726338958180485 [2021-12-17 23:19:07,888 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1561 transitions. [2021-12-17 23:19:07,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1561 transitions. [2021-12-17 23:19:07,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:07,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1561 transitions. [2021-12-17 23:19:07,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 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 23:19:07,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:07,899 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:07,899 INFO L186 Difference]: Start difference. First operand has 136 places, 103 transitions, 360 flow. Second operand 29 states and 1561 transitions. [2021-12-17 23:19:07,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 1049 flow [2021-12-17 23:19:07,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 955 flow, removed 38 selfloop flow, removed 13 redundant places. [2021-12-17 23:19:07,913 INFO L242 Difference]: Finished difference. Result has 156 places, 139 transitions, 637 flow [2021-12-17 23:19:07,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=637, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2021-12-17 23:19:07,915 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 68 predicate places. [2021-12-17 23:19:07,915 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 637 flow [2021-12-17 23:19:07,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:19:07,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:07,916 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] [2021-12-17 23:19:07,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:19:07,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1215992582, now seen corresponding path program 3 times [2021-12-17 23:19:07,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693005150] [2021-12-17 23:19:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:07,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:08,333 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 23:19:08,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:08,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693005150] [2021-12-17 23:19:08,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693005150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:08,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:08,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:19:08,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912560072] [2021-12-17 23:19:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:08,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:19:08,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:19:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:19:08,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:08,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 637 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:19:08,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:08,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:08,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:09,920 INFO L129 PetriNetUnfolder]: 240/651 cut-off events. [2021-12-17 23:19:09,921 INFO L130 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2021-12-17 23:19:09,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 651 events. 240/651 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3070 event pairs, 42 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 2226. Up to 401 conditions per place. [2021-12-17 23:19:09,928 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 102 selfloop transitions, 56 changer transitions 43/240 dead transitions. [2021-12-17 23:19:09,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 1595 flow [2021-12-17 23:19:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:19:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:19:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-12-17 23:19:09,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-12-17 23:19:09,934 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-12-17 23:19:09,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-12-17 23:19:09,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:09,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-12-17 23:19:09,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 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 23:19:09,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:19:09,947 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:19:09,947 INFO L186 Difference]: Start difference. First operand has 156 places, 139 transitions, 637 flow. Second operand 39 states and 2062 transitions. [2021-12-17 23:19:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 1595 flow [2021-12-17 23:19:09,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 1454 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-12-17 23:19:09,963 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 1065 flow [2021-12-17 23:19:09,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1065, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2021-12-17 23:19:09,965 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 113 predicate places. [2021-12-17 23:19:09,965 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 1065 flow [2021-12-17 23:19:09,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:19:09,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:09,966 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] [2021-12-17 23:19:09,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:19:09,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1665333946, now seen corresponding path program 4 times [2021-12-17 23:19:09,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:09,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168682977] [2021-12-17 23:19:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:09,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:10,401 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 23:19:10,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168682977] [2021-12-17 23:19:10,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168682977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:10,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:10,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:10,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127913112] [2021-12-17 23:19:10,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:10,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:10,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 1065 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:10,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:10,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:10,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:11,532 INFO L129 PetriNetUnfolder]: 238/637 cut-off events. [2021-12-17 23:19:11,532 INFO L130 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2021-12-17 23:19:11,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 637 events. 238/637 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2989 event pairs, 3 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 2564. Up to 403 conditions per place. [2021-12-17 23:19:11,543 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 111 selfloop transitions, 53 changer transitions 44/247 dead transitions. [2021-12-17 23:19:11,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 1855 flow [2021-12-17 23:19:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 23:19:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-17 23:19:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1502 transitions. [2021-12-17 23:19:11,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706686930091185 [2021-12-17 23:19:11,550 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1502 transitions. [2021-12-17 23:19:11,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1502 transitions. [2021-12-17 23:19:11,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:11,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1502 transitions. [2021-12-17 23:19:11,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 53.642857142857146) internal successors, (1502), 28 states have internal predecessors, (1502), 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 23:19:11,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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 23:19:11,561 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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 23:19:11,562 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 1065 flow. Second operand 28 states and 1502 transitions. [2021-12-17 23:19:11,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 1855 flow [2021-12-17 23:19:11,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 247 transitions, 1633 flow, removed 89 selfloop flow, removed 18 redundant places. [2021-12-17 23:19:11,579 INFO L242 Difference]: Finished difference. Result has 213 places, 187 transitions, 1114 flow [2021-12-17 23:19:11,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1114, PETRI_PLACES=213, PETRI_TRANSITIONS=187} [2021-12-17 23:19:11,582 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 125 predicate places. [2021-12-17 23:19:11,582 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 187 transitions, 1114 flow [2021-12-17 23:19:11,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:11,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:11,583 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] [2021-12-17 23:19:11,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:19:11,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash 699227332, now seen corresponding path program 5 times [2021-12-17 23:19:11,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:11,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611811458] [2021-12-17 23:19:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:11,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:11,954 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 23:19:11,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:11,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611811458] [2021-12-17 23:19:11,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611811458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:11,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:11,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:11,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527593614] [2021-12-17 23:19:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:11,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:11,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:11,959 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:11,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 187 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:11,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:11,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:11,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:13,262 INFO L129 PetriNetUnfolder]: 261/695 cut-off events. [2021-12-17 23:19:13,262 INFO L130 PetriNetUnfolder]: For 1977/1977 co-relation queries the response was YES. [2021-12-17 23:19:13,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 695 events. 261/695 cut-off events. For 1977/1977 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3342 event pairs, 20 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 2932. Up to 446 conditions per place. [2021-12-17 23:19:13,271 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 61 changer transitions 43/274 dead transitions. [2021-12-17 23:19:13,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 274 transitions, 2242 flow [2021-12-17 23:19:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:19:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:19:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-17 23:19:13,275 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-17 23:19:13,275 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-17 23:19:13,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-17 23:19:13,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:13,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-17 23:19:13,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 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 23:19:13,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:19:13,284 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:19:13,284 INFO L186 Difference]: Start difference. First operand has 213 places, 187 transitions, 1114 flow. Second operand 35 states and 1861 transitions. [2021-12-17 23:19:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 274 transitions, 2242 flow [2021-12-17 23:19:13,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 274 transitions, 1993 flow, removed 66 selfloop flow, removed 24 redundant places. [2021-12-17 23:19:13,300 INFO L242 Difference]: Finished difference. Result has 234 places, 215 transitions, 1438 flow [2021-12-17 23:19:13,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1438, PETRI_PLACES=234, PETRI_TRANSITIONS=215} [2021-12-17 23:19:13,301 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 146 predicate places. [2021-12-17 23:19:13,301 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 215 transitions, 1438 flow [2021-12-17 23:19:13,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:13,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:13,302 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] [2021-12-17 23:19:13,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:19:13,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1519473010, now seen corresponding path program 6 times [2021-12-17 23:19:13,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999471839] [2021-12-17 23:19:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:13,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:13,668 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 23:19:13,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:13,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999471839] [2021-12-17 23:19:13,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999471839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:13,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:13,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:13,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051241963] [2021-12-17 23:19:13,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:13,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:13,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:13,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:13,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 215 transitions, 1438 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:13,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:13,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:13,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:14,818 INFO L129 PetriNetUnfolder]: 265/703 cut-off events. [2021-12-17 23:19:14,819 INFO L130 PetriNetUnfolder]: For 2379/2379 co-relation queries the response was YES. [2021-12-17 23:19:14,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 703 events. 265/703 cut-off events. For 2379/2379 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3416 event pairs, 19 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3094. Up to 459 conditions per place. [2021-12-17 23:19:14,828 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 74 changer transitions 43/282 dead transitions. [2021-12-17 23:19:14,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 282 transitions, 2337 flow [2021-12-17 23:19:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2021-12-17 23:19:14,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2021-12-17 23:19:14,832 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2021-12-17 23:19:14,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2021-12-17 23:19:14,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:14,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2021-12-17 23:19:14,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 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 23:19:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:14,841 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:14,841 INFO L186 Difference]: Start difference. First operand has 234 places, 215 transitions, 1438 flow. Second operand 31 states and 1657 transitions. [2021-12-17 23:19:14,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 282 transitions, 2337 flow [2021-12-17 23:19:14,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 282 transitions, 2057 flow, removed 109 selfloop flow, removed 23 redundant places. [2021-12-17 23:19:14,859 INFO L242 Difference]: Finished difference. Result has 245 places, 224 transitions, 1536 flow [2021-12-17 23:19:14,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=245, PETRI_TRANSITIONS=224} [2021-12-17 23:19:14,860 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 157 predicate places. [2021-12-17 23:19:14,861 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 224 transitions, 1536 flow [2021-12-17 23:19:14,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:14,861 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:14,861 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] [2021-12-17 23:19:14,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:19:14,862 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1201914780, now seen corresponding path program 7 times [2021-12-17 23:19:14,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:14,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788737986] [2021-12-17 23:19:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:14,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:15,293 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 23:19:15,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788737986] [2021-12-17 23:19:15,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788737986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:15,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:15,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:15,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922026099] [2021-12-17 23:19:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:15,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:15,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:15,296 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:15,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 224 transitions, 1536 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:15,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:15,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:15,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:16,413 INFO L129 PetriNetUnfolder]: 264/744 cut-off events. [2021-12-17 23:19:16,414 INFO L130 PetriNetUnfolder]: For 2495/2495 co-relation queries the response was YES. [2021-12-17 23:19:16,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 744 events. 264/744 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3693 event pairs, 27 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3200. Up to 448 conditions per place. [2021-12-17 23:19:16,423 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 124 selfloop transitions, 76 changer transitions 44/283 dead transitions. [2021-12-17 23:19:16,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 283 transitions, 2405 flow [2021-12-17 23:19:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-17 23:19:16,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-17 23:19:16,427 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-17 23:19:16,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-17 23:19:16,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:16,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-17 23:19:16,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 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 23:19:16,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:16,435 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:16,435 INFO L186 Difference]: Start difference. First operand has 245 places, 224 transitions, 1536 flow. Second operand 31 states and 1658 transitions. [2021-12-17 23:19:16,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 283 transitions, 2405 flow [2021-12-17 23:19:16,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 283 transitions, 2194 flow, removed 48 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:16,455 INFO L242 Difference]: Finished difference. Result has 255 places, 224 transitions, 1617 flow [2021-12-17 23:19:16,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1617, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2021-12-17 23:19:16,456 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 167 predicate places. [2021-12-17 23:19:16,456 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 1617 flow [2021-12-17 23:19:16,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:16,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:16,457 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] [2021-12-17 23:19:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 23:19:16,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083334, now seen corresponding path program 8 times [2021-12-17 23:19:16,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711881498] [2021-12-17 23:19:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:16,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:16,828 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 23:19:16,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711881498] [2021-12-17 23:19:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711881498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:16,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:16,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:16,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714420748] [2021-12-17 23:19:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:16,834 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:16,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 1617 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:16,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:16,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:16,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:17,897 INFO L129 PetriNetUnfolder]: 260/739 cut-off events. [2021-12-17 23:19:17,897 INFO L130 PetriNetUnfolder]: For 2601/2601 co-relation queries the response was YES. [2021-12-17 23:19:17,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 739 events. 260/739 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3694 event pairs, 33 based on Foata normal form. 1/738 useless extension candidates. Maximal degree in co-relation 3265. Up to 456 conditions per place. [2021-12-17 23:19:17,909 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 73 changer transitions 39/277 dead transitions. [2021-12-17 23:19:17,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 277 transitions, 2429 flow [2021-12-17 23:19:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:19:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:19:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1603 transitions. [2021-12-17 23:19:17,935 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5684397163120567 [2021-12-17 23:19:17,935 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1603 transitions. [2021-12-17 23:19:17,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1603 transitions. [2021-12-17 23:19:17,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:17,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1603 transitions. [2021-12-17 23:19:17,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.43333333333333) internal successors, (1603), 30 states have internal predecessors, (1603), 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 23:19:17,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:17,944 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:17,944 INFO L186 Difference]: Start difference. First operand has 255 places, 224 transitions, 1617 flow. Second operand 30 states and 1603 transitions. [2021-12-17 23:19:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 277 transitions, 2429 flow [2021-12-17 23:19:17,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 277 transitions, 2192 flow, removed 35 selfloop flow, removed 29 redundant places. [2021-12-17 23:19:17,964 INFO L242 Difference]: Finished difference. Result has 256 places, 223 transitions, 1629 flow [2021-12-17 23:19:17,965 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=223} [2021-12-17 23:19:17,965 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-17 23:19:17,966 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 223 transitions, 1629 flow [2021-12-17 23:19:17,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:17,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:17,966 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] [2021-12-17 23:19:17,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:19:17,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash -944030314, now seen corresponding path program 9 times [2021-12-17 23:19:17,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:17,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672404896] [2021-12-17 23:19:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:17,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:18,365 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 23:19:18,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672404896] [2021-12-17 23:19:18,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672404896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:18,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:18,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:19:18,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341648105] [2021-12-17 23:19:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:18,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:19:18,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:19:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:19:18,368 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:18,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 223 transitions, 1629 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:19:18,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:18,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:18,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:20,565 INFO L129 PetriNetUnfolder]: 261/726 cut-off events. [2021-12-17 23:19:20,565 INFO L130 PetriNetUnfolder]: For 2958/2958 co-relation queries the response was YES. [2021-12-17 23:19:20,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 726 events. 261/726 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3615 event pairs, 28 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 3326. Up to 460 conditions per place. [2021-12-17 23:19:20,574 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 94 changer transitions 29/291 dead transitions. [2021-12-17 23:19:20,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 291 transitions, 2637 flow [2021-12-17 23:19:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:19:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 23:19:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2021-12-17 23:19:20,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-12-17 23:19:20,585 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2021-12-17 23:19:20,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2021-12-17 23:19:20,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:20,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2021-12-17 23:19:20,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 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 23:19:20,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:19:20,612 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:19:20,612 INFO L186 Difference]: Start difference. First operand has 256 places, 223 transitions, 1629 flow. Second operand 42 states and 2205 transitions. [2021-12-17 23:19:20,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 291 transitions, 2637 flow [2021-12-17 23:19:20,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 2381 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-12-17 23:19:20,635 INFO L242 Difference]: Finished difference. Result has 273 places, 244 transitions, 1891 flow [2021-12-17 23:19:20,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1891, PETRI_PLACES=273, PETRI_TRANSITIONS=244} [2021-12-17 23:19:20,637 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 185 predicate places. [2021-12-17 23:19:20,637 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 244 transitions, 1891 flow [2021-12-17 23:19:20,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:19:20,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:20,638 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] [2021-12-17 23:19:20,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 23:19:20,638 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -984614164, now seen corresponding path program 10 times [2021-12-17 23:19:20,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077080834] [2021-12-17 23:19:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:20,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:21,052 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 23:19:21,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:21,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077080834] [2021-12-17 23:19:21,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077080834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:21,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:21,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:21,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973560180] [2021-12-17 23:19:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:21,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:21,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:21,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:21,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:21,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 244 transitions, 1891 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:21,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:21,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:21,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:22,801 INFO L129 PetriNetUnfolder]: 261/745 cut-off events. [2021-12-17 23:19:22,801 INFO L130 PetriNetUnfolder]: For 3271/3271 co-relation queries the response was YES. [2021-12-17 23:19:22,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 745 events. 261/745 cut-off events. For 3271/3271 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3789 event pairs, 30 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3521. Up to 477 conditions per place. [2021-12-17 23:19:22,810 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 78 changer transitions 32/287 dead transitions. [2021-12-17 23:19:22,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 287 transitions, 2626 flow [2021-12-17 23:19:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:19:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:19:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-12-17 23:19:22,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-12-17 23:19:22,814 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-12-17 23:19:22,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-12-17 23:19:22,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:22,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-12-17 23:19:22,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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 23:19:22,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:22,821 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:22,821 INFO L186 Difference]: Start difference. First operand has 273 places, 244 transitions, 1891 flow. Second operand 33 states and 1745 transitions. [2021-12-17 23:19:22,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 287 transitions, 2626 flow [2021-12-17 23:19:22,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 287 transitions, 2308 flow, removed 96 selfloop flow, removed 27 redundant places. [2021-12-17 23:19:22,847 INFO L242 Difference]: Finished difference. Result has 280 places, 241 transitions, 1804 flow [2021-12-17 23:19:22,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1804, PETRI_PLACES=280, PETRI_TRANSITIONS=241} [2021-12-17 23:19:22,850 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 192 predicate places. [2021-12-17 23:19:22,850 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 241 transitions, 1804 flow [2021-12-17 23:19:22,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:22,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:22,851 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] [2021-12-17 23:19:22,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 23:19:22,851 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 531479520, now seen corresponding path program 11 times [2021-12-17 23:19:22,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391091846] [2021-12-17 23:19:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:22,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:23,218 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 23:19:23,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:23,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391091846] [2021-12-17 23:19:23,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391091846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:23,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:23,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:23,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127122435] [2021-12-17 23:19:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:23,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:23,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:23,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:23,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 241 transitions, 1804 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:23,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:23,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:23,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:24,218 INFO L129 PetriNetUnfolder]: 251/709 cut-off events. [2021-12-17 23:19:24,219 INFO L130 PetriNetUnfolder]: For 2910/2910 co-relation queries the response was YES. [2021-12-17 23:19:24,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 709 events. 251/709 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3481 event pairs, 22 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 3355. Up to 465 conditions per place. [2021-12-17 23:19:24,227 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 134 selfloop transitions, 75 changer transitions 26/274 dead transitions. [2021-12-17 23:19:24,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 274 transitions, 2427 flow [2021-12-17 23:19:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-17 23:19:24,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-17 23:19:24,229 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-17 23:19:24,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-17 23:19:24,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:24,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-17 23:19:24,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 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 23:19:24,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:24,236 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:24,236 INFO L186 Difference]: Start difference. First operand has 280 places, 241 transitions, 1804 flow. Second operand 31 states and 1639 transitions. [2021-12-17 23:19:24,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 274 transitions, 2427 flow [2021-12-17 23:19:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 274 transitions, 2189 flow, removed 25 selfloop flow, removed 33 redundant places. [2021-12-17 23:19:24,258 INFO L242 Difference]: Finished difference. Result has 274 places, 234 transitions, 1729 flow [2021-12-17 23:19:24,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1729, PETRI_PLACES=274, PETRI_TRANSITIONS=234} [2021-12-17 23:19:24,259 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2021-12-17 23:19:24,259 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 234 transitions, 1729 flow [2021-12-17 23:19:24,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:24,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:24,260 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] [2021-12-17 23:19:24,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 23:19:24,260 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash -94536446, now seen corresponding path program 12 times [2021-12-17 23:19:24,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:24,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235156365] [2021-12-17 23:19:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:24,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:24,635 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 23:19:24,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235156365] [2021-12-17 23:19:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235156365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:24,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:19:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718466345] [2021-12-17 23:19:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:24,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:19:24,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:19:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:19:24,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:24,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 234 transitions, 1729 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:19:24,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:24,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:24,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:25,763 INFO L129 PetriNetUnfolder]: 244/703 cut-off events. [2021-12-17 23:19:25,763 INFO L130 PetriNetUnfolder]: For 2607/2607 co-relation queries the response was YES. [2021-12-17 23:19:25,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 703 events. 244/703 cut-off events. For 2607/2607 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3416 event pairs, 26 based on Foata normal form. 1/703 useless extension candidates. Maximal degree in co-relation 3215. Up to 460 conditions per place. [2021-12-17 23:19:25,770 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 130 selfloop transitions, 75 changer transitions 19/263 dead transitions. [2021-12-17 23:19:25,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 263 transitions, 2301 flow [2021-12-17 23:19:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1633 transitions. [2021-12-17 23:19:25,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.560398078242965 [2021-12-17 23:19:25,773 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1633 transitions. [2021-12-17 23:19:25,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1633 transitions. [2021-12-17 23:19:25,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:25,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1633 transitions. [2021-12-17 23:19:25,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.67741935483871) internal successors, (1633), 31 states have internal predecessors, (1633), 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 23:19:25,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:25,779 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:25,779 INFO L186 Difference]: Start difference. First operand has 274 places, 234 transitions, 1729 flow. Second operand 31 states and 1633 transitions. [2021-12-17 23:19:25,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 263 transitions, 2301 flow [2021-12-17 23:19:25,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 263 transitions, 2097 flow, removed 17 selfloop flow, removed 33 redundant places. [2021-12-17 23:19:25,799 INFO L242 Difference]: Finished difference. Result has 267 places, 231 transitions, 1700 flow [2021-12-17 23:19:25,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1700, PETRI_PLACES=267, PETRI_TRANSITIONS=231} [2021-12-17 23:19:25,800 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 179 predicate places. [2021-12-17 23:19:25,800 INFO L470 AbstractCegarLoop]: Abstraction has has 267 places, 231 transitions, 1700 flow [2021-12-17 23:19:25,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:19:25,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:25,801 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] [2021-12-17 23:19:25,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 23:19:25,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1982707728, now seen corresponding path program 13 times [2021-12-17 23:19:25,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:25,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852430951] [2021-12-17 23:19:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:25,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:26,188 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 23:19:26,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852430951] [2021-12-17 23:19:26,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852430951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:26,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:26,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:19:26,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363247368] [2021-12-17 23:19:26,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:26,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:19:26,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:19:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:19:26,191 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:26,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 231 transitions, 1700 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:19:26,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:26,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:26,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:27,281 INFO L129 PetriNetUnfolder]: 238/685 cut-off events. [2021-12-17 23:19:27,281 INFO L130 PetriNetUnfolder]: For 2351/2351 co-relation queries the response was YES. [2021-12-17 23:19:27,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 685 events. 238/685 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3224 event pairs, 29 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 3103. Up to 452 conditions per place. [2021-12-17 23:19:27,288 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 65 changer transitions 26/253 dead transitions. [2021-12-17 23:19:27,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 253 transitions, 2225 flow [2021-12-17 23:19:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:19:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:19:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1677 transitions. [2021-12-17 23:19:27,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575132978723404 [2021-12-17 23:19:27,290 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1677 transitions. [2021-12-17 23:19:27,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1677 transitions. [2021-12-17 23:19:27,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:27,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1677 transitions. [2021-12-17 23:19:27,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.40625) internal successors, (1677), 32 states have internal predecessors, (1677), 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 23:19:27,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:27,301 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:27,301 INFO L186 Difference]: Start difference. First operand has 267 places, 231 transitions, 1700 flow. Second operand 32 states and 1677 transitions. [2021-12-17 23:19:27,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 253 transitions, 2225 flow [2021-12-17 23:19:27,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2037 flow, removed 9 selfloop flow, removed 31 redundant places. [2021-12-17 23:19:27,320 INFO L242 Difference]: Finished difference. Result has 264 places, 215 transitions, 1558 flow [2021-12-17 23:19:27,320 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1558, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2021-12-17 23:19:27,322 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2021-12-17 23:19:27,322 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 1558 flow [2021-12-17 23:19:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:19:27,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:27,322 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] [2021-12-17 23:19:27,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 23:19:27,323 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1690499486, now seen corresponding path program 14 times [2021-12-17 23:19:27,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730614459] [2021-12-17 23:19:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:27,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:27,661 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 23:19:27,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:27,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730614459] [2021-12-17 23:19:27,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730614459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:27,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:27,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741145419] [2021-12-17 23:19:27,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:27,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:27,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:27,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:27,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 1558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:27,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:27,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:27,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:28,864 INFO L129 PetriNetUnfolder]: 260/745 cut-off events. [2021-12-17 23:19:28,864 INFO L130 PetriNetUnfolder]: For 2600/2600 co-relation queries the response was YES. [2021-12-17 23:19:28,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 745 events. 260/745 cut-off events. For 2600/2600 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3749 event pairs, 38 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3287. Up to 436 conditions per place. [2021-12-17 23:19:28,875 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 42/284 dead transitions. [2021-12-17 23:19:28,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 284 transitions, 2512 flow [2021-12-17 23:19:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:19:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:19:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-17 23:19:28,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-17 23:19:28,881 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-17 23:19:28,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-17 23:19:28,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:28,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-17 23:19:28,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 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 23:19:28,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:19:28,888 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:19:28,888 INFO L186 Difference]: Start difference. First operand has 264 places, 215 transitions, 1558 flow. Second operand 35 states and 1861 transitions. [2021-12-17 23:19:28,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 284 transitions, 2512 flow [2021-12-17 23:19:28,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 284 transitions, 2221 flow, removed 45 selfloop flow, removed 29 redundant places. [2021-12-17 23:19:28,908 INFO L242 Difference]: Finished difference. Result has 256 places, 224 transitions, 1654 flow [2021-12-17 23:19:28,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1654, PETRI_PLACES=256, PETRI_TRANSITIONS=224} [2021-12-17 23:19:28,909 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-17 23:19:28,909 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 224 transitions, 1654 flow [2021-12-17 23:19:28,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:28,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:28,910 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] [2021-12-17 23:19:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 23:19:28,910 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash -958827984, now seen corresponding path program 15 times [2021-12-17 23:19:28,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:28,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649007187] [2021-12-17 23:19:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:28,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:29,284 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 23:19:29,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:29,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649007187] [2021-12-17 23:19:29,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649007187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:29,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:29,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:29,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570877029] [2021-12-17 23:19:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:29,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:29,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:29,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:29,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 224 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:29,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:29,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:29,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:30,429 INFO L129 PetriNetUnfolder]: 272/766 cut-off events. [2021-12-17 23:19:30,429 INFO L130 PetriNetUnfolder]: For 3723/3723 co-relation queries the response was YES. [2021-12-17 23:19:30,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 766 events. 272/766 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3741 event pairs, 23 based on Foata normal form. 1/764 useless extension candidates. Maximal degree in co-relation 3600. Up to 458 conditions per place. [2021-12-17 23:19:30,438 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 101 changer transitions 22/300 dead transitions. [2021-12-17 23:19:30,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 300 transitions, 2850 flow [2021-12-17 23:19:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:19:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:19:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1818 transitions. [2021-12-17 23:19:30,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688360450563203 [2021-12-17 23:19:30,441 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1818 transitions. [2021-12-17 23:19:30,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1818 transitions. [2021-12-17 23:19:30,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:30,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1818 transitions. [2021-12-17 23:19:30,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.470588235294116) internal successors, (1818), 34 states have internal predecessors, (1818), 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 23:19:30,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:19:30,449 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:19:30,449 INFO L186 Difference]: Start difference. First operand has 256 places, 224 transitions, 1654 flow. Second operand 34 states and 1818 transitions. [2021-12-17 23:19:30,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 300 transitions, 2850 flow [2021-12-17 23:19:30,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 2572 flow, removed 73 selfloop flow, removed 29 redundant places. [2021-12-17 23:19:30,479 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 2016 flow [2021-12-17 23:19:30,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2016, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2021-12-17 23:19:30,481 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2021-12-17 23:19:30,481 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 2016 flow [2021-12-17 23:19:30,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:30,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:30,482 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] [2021-12-17 23:19:30,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 23:19:30,482 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2084111022, now seen corresponding path program 16 times [2021-12-17 23:19:30,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:30,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91399379] [2021-12-17 23:19:30,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:30,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:30,883 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 23:19:30,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:30,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91399379] [2021-12-17 23:19:30,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91399379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:30,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:30,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:19:30,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984468078] [2021-12-17 23:19:30,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:30,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:19:30,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:19:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:19:30,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:30,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 2016 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:19:30,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:30,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:30,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:31,859 INFO L129 PetriNetUnfolder]: 280/785 cut-off events. [2021-12-17 23:19:31,859 INFO L130 PetriNetUnfolder]: For 3920/3920 co-relation queries the response was YES. [2021-12-17 23:19:31,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 785 events. 280/785 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3957 event pairs, 24 based on Foata normal form. 1/783 useless extension candidates. Maximal degree in co-relation 3839. Up to 487 conditions per place. [2021-12-17 23:19:31,867 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 89 changer transitions 29/308 dead transitions. [2021-12-17 23:19:31,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 308 transitions, 3040 flow [2021-12-17 23:19:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:19:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:19:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1560 transitions. [2021-12-17 23:19:31,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5722670579603815 [2021-12-17 23:19:31,869 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1560 transitions. [2021-12-17 23:19:31,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1560 transitions. [2021-12-17 23:19:31,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:31,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1560 transitions. [2021-12-17 23:19:31,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.793103448275865) internal successors, (1560), 29 states have internal predecessors, (1560), 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 23:19:31,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:31,875 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:31,875 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 2016 flow. Second operand 29 states and 1560 transitions. [2021-12-17 23:19:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 308 transitions, 3040 flow [2021-12-17 23:19:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 308 transitions, 2719 flow, removed 122 selfloop flow, removed 14 redundant places. [2021-12-17 23:19:31,902 INFO L242 Difference]: Finished difference. Result has 278 places, 259 transitions, 2077 flow [2021-12-17 23:19:31,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2077, PETRI_PLACES=278, PETRI_TRANSITIONS=259} [2021-12-17 23:19:31,903 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 190 predicate places. [2021-12-17 23:19:31,903 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 259 transitions, 2077 flow [2021-12-17 23:19:31,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:19:31,903 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:31,903 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] [2021-12-17 23:19:31,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 23:19:31,904 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 331956586, now seen corresponding path program 17 times [2021-12-17 23:19:31,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237249823] [2021-12-17 23:19:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:31,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:32,284 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 23:19:32,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237249823] [2021-12-17 23:19:32,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237249823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:32,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:32,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:32,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645520095] [2021-12-17 23:19:32,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:32,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:32,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:32,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:32,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 259 transitions, 2077 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:32,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:32,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:32,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:33,283 INFO L129 PetriNetUnfolder]: 278/780 cut-off events. [2021-12-17 23:19:33,283 INFO L130 PetriNetUnfolder]: For 4197/4197 co-relation queries the response was YES. [2021-12-17 23:19:33,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 780 events. 278/780 cut-off events. For 4197/4197 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3900 event pairs, 25 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 3910. Up to 483 conditions per place. [2021-12-17 23:19:33,291 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 85 changer transitions 35/308 dead transitions. [2021-12-17 23:19:33,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 308 transitions, 3007 flow [2021-12-17 23:19:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-17 23:19:33,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-17 23:19:33,293 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-17 23:19:33,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-17 23:19:33,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:33,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-17 23:19:33,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 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 23:19:33,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:33,299 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:33,299 INFO L186 Difference]: Start difference. First operand has 278 places, 259 transitions, 2077 flow. Second operand 31 states and 1658 transitions. [2021-12-17 23:19:33,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 308 transitions, 3007 flow [2021-12-17 23:19:33,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 308 transitions, 2721 flow, removed 64 selfloop flow, removed 27 redundant places. [2021-12-17 23:19:33,325 INFO L242 Difference]: Finished difference. Result has 286 places, 256 transitions, 2053 flow [2021-12-17 23:19:33,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2053, PETRI_PLACES=286, PETRI_TRANSITIONS=256} [2021-12-17 23:19:33,326 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-17 23:19:33,326 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 256 transitions, 2053 flow [2021-12-17 23:19:33,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:33,327 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:33,327 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] [2021-12-17 23:19:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 23:19:33,327 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1742136890, now seen corresponding path program 18 times [2021-12-17 23:19:33,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337332786] [2021-12-17 23:19:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:33,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:33,714 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 23:19:33,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:33,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337332786] [2021-12-17 23:19:33,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337332786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:33,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:33,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:33,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901450597] [2021-12-17 23:19:33,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:33,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:33,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:33,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:33,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 256 transitions, 2053 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:33,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:33,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:33,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:34,789 INFO L129 PetriNetUnfolder]: 274/768 cut-off events. [2021-12-17 23:19:34,789 INFO L130 PetriNetUnfolder]: For 3942/3942 co-relation queries the response was YES. [2021-12-17 23:19:34,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 768 events. 274/768 cut-off events. For 3942/3942 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3827 event pairs, 24 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3868. Up to 481 conditions per place. [2021-12-17 23:19:34,797 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 92 changer transitions 26/304 dead transitions. [2021-12-17 23:19:34,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 2973 flow [2021-12-17 23:19:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:19:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:19:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1606 transitions. [2021-12-17 23:19:34,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5695035460992908 [2021-12-17 23:19:34,801 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1606 transitions. [2021-12-17 23:19:34,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1606 transitions. [2021-12-17 23:19:34,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:34,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1606 transitions. [2021-12-17 23:19:34,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.53333333333333) internal successors, (1606), 30 states have internal predecessors, (1606), 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 23:19:34,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:34,807 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:34,807 INFO L186 Difference]: Start difference. First operand has 286 places, 256 transitions, 2053 flow. Second operand 30 states and 1606 transitions. [2021-12-17 23:19:34,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 2973 flow [2021-12-17 23:19:34,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 2719 flow, removed 24 selfloop flow, removed 28 redundant places. [2021-12-17 23:19:34,835 INFO L242 Difference]: Finished difference. Result has 286 places, 259 transitions, 2104 flow [2021-12-17 23:19:34,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2104, PETRI_PLACES=286, PETRI_TRANSITIONS=259} [2021-12-17 23:19:34,836 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-17 23:19:34,836 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 259 transitions, 2104 flow [2021-12-17 23:19:34,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:34,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:34,837 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] [2021-12-17 23:19:34,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 23:19:34,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2093389318, now seen corresponding path program 19 times [2021-12-17 23:19:34,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:34,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311453766] [2021-12-17 23:19:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:34,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:35,194 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 23:19:35,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:35,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311453766] [2021-12-17 23:19:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311453766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:35,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:35,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:35,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164631194] [2021-12-17 23:19:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:35,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:35,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:35,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:35,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 259 transitions, 2104 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:35,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:35,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:35,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:36,251 INFO L129 PetriNetUnfolder]: 280/787 cut-off events. [2021-12-17 23:19:36,252 INFO L130 PetriNetUnfolder]: For 4345/4345 co-relation queries the response was YES. [2021-12-17 23:19:36,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 787 events. 280/787 cut-off events. For 4345/4345 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4001 event pairs, 26 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 4008. Up to 511 conditions per place. [2021-12-17 23:19:36,258 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 78 changer transitions 30/312 dead transitions. [2021-12-17 23:19:36,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 312 transitions, 3125 flow [2021-12-17 23:19:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1651 transitions. [2021-12-17 23:19:36,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5665751544269046 [2021-12-17 23:19:36,260 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1651 transitions. [2021-12-17 23:19:36,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1651 transitions. [2021-12-17 23:19:36,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:36,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1651 transitions. [2021-12-17 23:19:36,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.25806451612903) internal successors, (1651), 31 states have internal predecessors, (1651), 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 23:19:36,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:36,265 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:36,266 INFO L186 Difference]: Start difference. First operand has 286 places, 259 transitions, 2104 flow. Second operand 31 states and 1651 transitions. [2021-12-17 23:19:36,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 312 transitions, 3125 flow [2021-12-17 23:19:36,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 312 transitions, 2890 flow, removed 47 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:36,291 INFO L242 Difference]: Finished difference. Result has 297 places, 266 transitions, 2244 flow [2021-12-17 23:19:36,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2244, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2021-12-17 23:19:36,292 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-12-17 23:19:36,292 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 2244 flow [2021-12-17 23:19:36,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:36,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:36,292 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] [2021-12-17 23:19:36,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 23:19:36,292 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1511959520, now seen corresponding path program 20 times [2021-12-17 23:19:36,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:36,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057504398] [2021-12-17 23:19:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:36,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:36,672 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 23:19:36,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:36,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057504398] [2021-12-17 23:19:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057504398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:36,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:36,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348430925] [2021-12-17 23:19:36,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:36,674 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:36,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 2244 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:36,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:36,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:36,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:37,941 INFO L129 PetriNetUnfolder]: 278/777 cut-off events. [2021-12-17 23:19:37,942 INFO L130 PetriNetUnfolder]: For 4500/4500 co-relation queries the response was YES. [2021-12-17 23:19:37,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 777 events. 278/777 cut-off events. For 4500/4500 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3913 event pairs, 24 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 4055. Up to 503 conditions per place. [2021-12-17 23:19:37,949 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 86 changer transitions 30/310 dead transitions. [2021-12-17 23:19:37,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 310 transitions, 3174 flow [2021-12-17 23:19:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:19:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:19:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2021-12-17 23:19:37,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2021-12-17 23:19:37,952 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2021-12-17 23:19:37,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2021-12-17 23:19:37,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:37,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2021-12-17 23:19:37,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 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 23:19:37,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:37,958 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:37,958 INFO L186 Difference]: Start difference. First operand has 297 places, 266 transitions, 2244 flow. Second operand 32 states and 1701 transitions. [2021-12-17 23:19:37,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 310 transitions, 3174 flow [2021-12-17 23:19:37,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 310 transitions, 2977 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:37,992 INFO L242 Difference]: Finished difference. Result has 304 places, 264 transitions, 2304 flow [2021-12-17 23:19:37,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2304, PETRI_PLACES=304, PETRI_TRANSITIONS=264} [2021-12-17 23:19:37,993 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2021-12-17 23:19:37,993 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 264 transitions, 2304 flow [2021-12-17 23:19:37,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:37,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:37,994 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] [2021-12-17 23:19:37,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 23:19:37,994 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2051343124, now seen corresponding path program 21 times [2021-12-17 23:19:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:37,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287335337] [2021-12-17 23:19:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:37,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:38,368 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 23:19:38,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287335337] [2021-12-17 23:19:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287335337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:38,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:38,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:38,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873790649] [2021-12-17 23:19:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:38,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:38,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:38,370 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:38,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 264 transitions, 2304 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:38,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:38,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:38,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:39,493 INFO L129 PetriNetUnfolder]: 281/795 cut-off events. [2021-12-17 23:19:39,493 INFO L130 PetriNetUnfolder]: For 4956/4956 co-relation queries the response was YES. [2021-12-17 23:19:39,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4288 conditions, 795 events. 281/795 cut-off events. For 4956/4956 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4026 event pairs, 23 based on Foata normal form. 1/792 useless extension candidates. Maximal degree in co-relation 4196. Up to 476 conditions per place. [2021-12-17 23:19:39,502 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 115 changer transitions 20/325 dead transitions. [2021-12-17 23:19:39,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 325 transitions, 3423 flow [2021-12-17 23:19:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:19:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:19:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-12-17 23:19:39,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-12-17 23:19:39,505 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-12-17 23:19:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-12-17 23:19:39,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:39,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-12-17 23:19:39,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 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 23:19:39,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:19:39,511 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:19:39,511 INFO L186 Difference]: Start difference. First operand has 304 places, 264 transitions, 2304 flow. Second operand 34 states and 1817 transitions. [2021-12-17 23:19:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 325 transitions, 3423 flow [2021-12-17 23:19:39,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 325 transitions, 3154 flow, removed 63 selfloop flow, removed 30 redundant places. [2021-12-17 23:19:39,549 INFO L242 Difference]: Finished difference. Result has 308 places, 280 transitions, 2581 flow [2021-12-17 23:19:39,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2581, PETRI_PLACES=308, PETRI_TRANSITIONS=280} [2021-12-17 23:19:39,550 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2021-12-17 23:19:39,551 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 280 transitions, 2581 flow [2021-12-17 23:19:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:39,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:39,551 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] [2021-12-17 23:19:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 23:19:39,552 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1916503756, now seen corresponding path program 22 times [2021-12-17 23:19:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715073905] [2021-12-17 23:19:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:39,929 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 23:19:39,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:39,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715073905] [2021-12-17 23:19:39,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715073905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:39,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:39,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:39,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917816966] [2021-12-17 23:19:39,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:39,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:39,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:39,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:39,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 280 transitions, 2581 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:39,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:39,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:39,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:41,470 INFO L129 PetriNetUnfolder]: 284/809 cut-off events. [2021-12-17 23:19:41,470 INFO L130 PetriNetUnfolder]: For 4572/4572 co-relation queries the response was YES. [2021-12-17 23:19:41,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 809 events. 284/809 cut-off events. For 4572/4572 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4138 event pairs, 18 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 4352. Up to 513 conditions per place. [2021-12-17 23:19:41,477 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 102 changer transitions 21/327 dead transitions. [2021-12-17 23:19:41,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 327 transitions, 3543 flow [2021-12-17 23:19:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:19:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:19:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-17 23:19:41,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-17 23:19:41,478 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-17 23:19:41,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-17 23:19:41,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:41,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-17 23:19:41,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 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 23:19:41,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:41,483 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:41,483 INFO L186 Difference]: Start difference. First operand has 308 places, 280 transitions, 2581 flow. Second operand 33 states and 1758 transitions. [2021-12-17 23:19:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 327 transitions, 3543 flow [2021-12-17 23:19:41,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 327 transitions, 3330 flow, removed 47 selfloop flow, removed 21 redundant places. [2021-12-17 23:19:41,511 INFO L242 Difference]: Finished difference. Result has 324 places, 286 transitions, 2726 flow [2021-12-17 23:19:41,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2726, PETRI_PLACES=324, PETRI_TRANSITIONS=286} [2021-12-17 23:19:41,512 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 236 predicate places. [2021-12-17 23:19:41,512 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 286 transitions, 2726 flow [2021-12-17 23:19:41,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:41,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:41,513 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] [2021-12-17 23:19:41,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 23:19:41,513 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 31959134, now seen corresponding path program 23 times [2021-12-17 23:19:41,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:41,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421758056] [2021-12-17 23:19:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:41,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:41,815 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 23:19:41,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:41,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421758056] [2021-12-17 23:19:41,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421758056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:41,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:41,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:41,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504320911] [2021-12-17 23:19:41,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:41,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:41,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:41,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 286 transitions, 2726 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:41,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:41,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:41,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:42,817 INFO L129 PetriNetUnfolder]: 278/795 cut-off events. [2021-12-17 23:19:42,817 INFO L130 PetriNetUnfolder]: For 5015/5015 co-relation queries the response was YES. [2021-12-17 23:19:42,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 795 events. 278/795 cut-off events. For 5015/5015 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4101 event pairs, 18 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 4419. Up to 491 conditions per place. [2021-12-17 23:19:42,825 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 156 selfloop transitions, 104 changer transitions 26/325 dead transitions. [2021-12-17 23:19:42,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 325 transitions, 3580 flow [2021-12-17 23:19:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-17 23:19:42,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-17 23:19:42,829 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-17 23:19:42,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-17 23:19:42,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:42,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-17 23:19:42,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 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 23:19:42,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:42,834 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:42,834 INFO L186 Difference]: Start difference. First operand has 324 places, 286 transitions, 2726 flow. Second operand 31 states and 1658 transitions. [2021-12-17 23:19:42,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 325 transitions, 3580 flow [2021-12-17 23:19:42,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 325 transitions, 3376 flow, removed 33 selfloop flow, removed 27 redundant places. [2021-12-17 23:19:42,875 INFO L242 Difference]: Finished difference. Result has 328 places, 278 transitions, 2727 flow [2021-12-17 23:19:42,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2727, PETRI_PLACES=328, PETRI_TRANSITIONS=278} [2021-12-17 23:19:42,876 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 240 predicate places. [2021-12-17 23:19:42,877 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 278 transitions, 2727 flow [2021-12-17 23:19:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:42,877 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:42,877 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] [2021-12-17 23:19:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 23:19:42,877 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 608355172, now seen corresponding path program 24 times [2021-12-17 23:19:42,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:42,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674511704] [2021-12-17 23:19:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:42,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:43,173 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 23:19:43,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:43,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674511704] [2021-12-17 23:19:43,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674511704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:43,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:43,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:43,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778417192] [2021-12-17 23:19:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:43,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:43,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:43,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 278 transitions, 2727 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:43,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:43,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:43,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:44,170 INFO L129 PetriNetUnfolder]: 271/784 cut-off events. [2021-12-17 23:19:44,171 INFO L130 PetriNetUnfolder]: For 4867/4867 co-relation queries the response was YES. [2021-12-17 23:19:44,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 784 events. 271/784 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4016 event pairs, 20 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 4401. Up to 508 conditions per place. [2021-12-17 23:19:44,182 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 92 changer transitions 18/311 dead transitions. [2021-12-17 23:19:44,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 311 transitions, 3473 flow [2021-12-17 23:19:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:19:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:19:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1597 transitions. [2021-12-17 23:19:44,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663120567375887 [2021-12-17 23:19:44,185 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1597 transitions. [2021-12-17 23:19:44,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1597 transitions. [2021-12-17 23:19:44,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:44,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1597 transitions. [2021-12-17 23:19:44,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.233333333333334) internal successors, (1597), 30 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:44,189 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:44,190 INFO L186 Difference]: Start difference. First operand has 328 places, 278 transitions, 2727 flow. Second operand 30 states and 1597 transitions. [2021-12-17 23:19:44,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 311 transitions, 3473 flow [2021-12-17 23:19:44,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 311 transitions, 3185 flow, removed 17 selfloop flow, removed 31 redundant places. [2021-12-17 23:19:44,229 INFO L242 Difference]: Finished difference. Result has 322 places, 275 transitions, 2649 flow [2021-12-17 23:19:44,229 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2649, PETRI_PLACES=322, PETRI_TRANSITIONS=275} [2021-12-17 23:19:44,230 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 234 predicate places. [2021-12-17 23:19:44,230 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 275 transitions, 2649 flow [2021-12-17 23:19:44,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:44,230 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:44,230 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] [2021-12-17 23:19:44,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 23:19:44,231 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1450990916, now seen corresponding path program 25 times [2021-12-17 23:19:44,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231855645] [2021-12-17 23:19:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:44,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:44,575 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 23:19:44,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231855645] [2021-12-17 23:19:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231855645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:44,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:44,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:44,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265884993] [2021-12-17 23:19:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:44,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:44,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:44,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:44,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 275 transitions, 2649 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:44,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:44,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:44,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:45,821 INFO L129 PetriNetUnfolder]: 278/802 cut-off events. [2021-12-17 23:19:45,821 INFO L130 PetriNetUnfolder]: For 5200/5200 co-relation queries the response was YES. [2021-12-17 23:19:45,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 802 events. 278/802 cut-off events. For 5200/5200 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4112 event pairs, 18 based on Foata normal form. 1/801 useless extension candidates. Maximal degree in co-relation 4490. Up to 501 conditions per place. [2021-12-17 23:19:45,829 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 157 selfloop transitions, 105 changer transitions 21/322 dead transitions. [2021-12-17 23:19:45,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 322 transitions, 3642 flow [2021-12-17 23:19:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:19:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:19:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2021-12-17 23:19:45,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2021-12-17 23:19:45,832 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2021-12-17 23:19:45,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2021-12-17 23:19:45,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:45,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2021-12-17 23:19:45,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 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 23:19:45,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:45,836 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:45,837 INFO L186 Difference]: Start difference. First operand has 322 places, 275 transitions, 2649 flow. Second operand 33 states and 1756 transitions. [2021-12-17 23:19:45,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 322 transitions, 3642 flow [2021-12-17 23:19:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 322 transitions, 3376 flow, removed 21 selfloop flow, removed 31 redundant places. [2021-12-17 23:19:45,875 INFO L242 Difference]: Finished difference. Result has 326 places, 281 transitions, 2779 flow [2021-12-17 23:19:45,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2779, PETRI_PLACES=326, PETRI_TRANSITIONS=281} [2021-12-17 23:19:45,876 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 238 predicate places. [2021-12-17 23:19:45,876 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 281 transitions, 2779 flow [2021-12-17 23:19:45,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:45,877 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:45,877 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] [2021-12-17 23:19:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 23:19:45,877 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -914775274, now seen corresponding path program 26 times [2021-12-17 23:19:45,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764561808] [2021-12-17 23:19:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:45,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:46,221 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 23:19:46,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764561808] [2021-12-17 23:19:46,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764561808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:46,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:46,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:46,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902309829] [2021-12-17 23:19:46,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:46,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:46,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:46,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:46,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:46,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:46,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 281 transitions, 2779 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:46,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:46,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:46,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:47,330 INFO L129 PetriNetUnfolder]: 271/797 cut-off events. [2021-12-17 23:19:47,330 INFO L130 PetriNetUnfolder]: For 5483/5483 co-relation queries the response was YES. [2021-12-17 23:19:47,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 797 events. 271/797 cut-off events. For 5483/5483 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4149 event pairs, 22 based on Foata normal form. 1/795 useless extension candidates. Maximal degree in co-relation 4496. Up to 511 conditions per place. [2021-12-17 23:19:47,341 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 96 changer transitions 18/314 dead transitions. [2021-12-17 23:19:47,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 314 transitions, 3533 flow [2021-12-17 23:19:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1647 transitions. [2021-12-17 23:19:47,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5652024708304736 [2021-12-17 23:19:47,343 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1647 transitions. [2021-12-17 23:19:47,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1647 transitions. [2021-12-17 23:19:47,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:47,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1647 transitions. [2021-12-17 23:19:47,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.12903225806452) internal successors, (1647), 31 states have internal predecessors, (1647), 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 23:19:47,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:47,348 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:47,348 INFO L186 Difference]: Start difference. First operand has 326 places, 281 transitions, 2779 flow. Second operand 31 states and 1647 transitions. [2021-12-17 23:19:47,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 314 transitions, 3533 flow [2021-12-17 23:19:47,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 314 transitions, 3325 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:47,390 INFO L242 Difference]: Finished difference. Result has 331 places, 278 transitions, 2788 flow [2021-12-17 23:19:47,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2788, PETRI_PLACES=331, PETRI_TRANSITIONS=278} [2021-12-17 23:19:47,391 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2021-12-17 23:19:47,391 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 278 transitions, 2788 flow [2021-12-17 23:19:47,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:47,392 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:47,392 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] [2021-12-17 23:19:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 23:19:47,392 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2013754086, now seen corresponding path program 27 times [2021-12-17 23:19:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:47,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004456639] [2021-12-17 23:19:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:47,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:47,757 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 23:19:47,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004456639] [2021-12-17 23:19:47,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004456639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:47,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:47,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:47,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612714580] [2021-12-17 23:19:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:47,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:47,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:47,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:47,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 278 transitions, 2788 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:47,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:47,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:47,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:48,914 INFO L129 PetriNetUnfolder]: 278/817 cut-off events. [2021-12-17 23:19:48,915 INFO L130 PetriNetUnfolder]: For 5596/5596 co-relation queries the response was YES. [2021-12-17 23:19:48,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 817 events. 278/817 cut-off events. For 5596/5596 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4247 event pairs, 19 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 4647. Up to 536 conditions per place. [2021-12-17 23:19:48,923 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 178 selfloop transitions, 84 changer transitions 21/322 dead transitions. [2021-12-17 23:19:48,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 322 transitions, 3757 flow [2021-12-17 23:19:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:19:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:19:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1748 transitions. [2021-12-17 23:19:48,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635074145712443 [2021-12-17 23:19:48,925 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1748 transitions. [2021-12-17 23:19:48,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1748 transitions. [2021-12-17 23:19:48,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:48,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1748 transitions. [2021-12-17 23:19:48,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.96969696969697) internal successors, (1748), 33 states have internal predecessors, (1748), 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 23:19:48,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:48,930 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:48,930 INFO L186 Difference]: Start difference. First operand has 331 places, 278 transitions, 2788 flow. Second operand 33 states and 1748 transitions. [2021-12-17 23:19:48,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 322 transitions, 3757 flow [2021-12-17 23:19:48,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 322 transitions, 3429 flow, removed 29 selfloop flow, removed 33 redundant places. [2021-12-17 23:19:48,986 INFO L242 Difference]: Finished difference. Result has 333 places, 284 transitions, 2794 flow [2021-12-17 23:19:48,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2794, PETRI_PLACES=333, PETRI_TRANSITIONS=284} [2021-12-17 23:19:48,987 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-17 23:19:48,987 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 284 transitions, 2794 flow [2021-12-17 23:19:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:48,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:48,988 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] [2021-12-17 23:19:48,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 23:19:48,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2005848438, now seen corresponding path program 28 times [2021-12-17 23:19:48,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211235742] [2021-12-17 23:19:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:48,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:49,287 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 23:19:49,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211235742] [2021-12-17 23:19:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211235742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:49,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:49,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:49,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406811443] [2021-12-17 23:19:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:49,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:49,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:49,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:49,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 284 transitions, 2794 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:49,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:49,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:49,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:50,337 INFO L129 PetriNetUnfolder]: 271/808 cut-off events. [2021-12-17 23:19:50,337 INFO L130 PetriNetUnfolder]: For 5581/5581 co-relation queries the response was YES. [2021-12-17 23:19:50,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 808 events. 271/808 cut-off events. For 5581/5581 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4249 event pairs, 21 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 4515. Up to 540 conditions per place. [2021-12-17 23:19:50,346 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 179 selfloop transitions, 78 changer transitions 18/314 dead transitions. [2021-12-17 23:19:50,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 314 transitions, 3522 flow [2021-12-17 23:19:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:19:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:19:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-17 23:19:50,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-17 23:19:50,353 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-17 23:19:50,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-17 23:19:50,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:50,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-17 23:19:50,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 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 23:19:50,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:50,358 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:19:50,358 INFO L186 Difference]: Start difference. First operand has 333 places, 284 transitions, 2794 flow. Second operand 31 states and 1639 transitions. [2021-12-17 23:19:50,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 314 transitions, 3522 flow [2021-12-17 23:19:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 314 transitions, 3340 flow, removed 33 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:50,401 INFO L242 Difference]: Finished difference. Result has 338 places, 281 transitions, 2759 flow [2021-12-17 23:19:50,402 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2759, PETRI_PLACES=338, PETRI_TRANSITIONS=281} [2021-12-17 23:19:50,407 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-17 23:19:50,407 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 281 transitions, 2759 flow [2021-12-17 23:19:50,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:50,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:50,407 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] [2021-12-17 23:19:50,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 23:19:50,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 924134558, now seen corresponding path program 29 times [2021-12-17 23:19:50,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041478214] [2021-12-17 23:19:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:50,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:50,774 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 23:19:50,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041478214] [2021-12-17 23:19:50,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041478214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:50,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:50,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:50,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82896326] [2021-12-17 23:19:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:50,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:50,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:50,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 281 transitions, 2759 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:50,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:50,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:50,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:51,724 INFO L129 PetriNetUnfolder]: 271/815 cut-off events. [2021-12-17 23:19:51,725 INFO L130 PetriNetUnfolder]: For 5692/5692 co-relation queries the response was YES. [2021-12-17 23:19:51,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 815 events. 271/815 cut-off events. For 5692/5692 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4285 event pairs, 19 based on Foata normal form. 1/813 useless extension candidates. Maximal degree in co-relation 4579. Up to 486 conditions per place. [2021-12-17 23:19:51,735 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 154 selfloop transitions, 115 changer transitions 21/329 dead transitions. [2021-12-17 23:19:51,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 329 transitions, 3793 flow [2021-12-17 23:19:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:19:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:19:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1555 transitions. [2021-12-17 23:19:51,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5704328686720469 [2021-12-17 23:19:51,737 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1555 transitions. [2021-12-17 23:19:51,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1555 transitions. [2021-12-17 23:19:51,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:51,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1555 transitions. [2021-12-17 23:19:51,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.62068965517241) internal successors, (1555), 29 states have internal predecessors, (1555), 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 23:19:51,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:51,741 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:51,741 INFO L186 Difference]: Start difference. First operand has 338 places, 281 transitions, 2759 flow. Second operand 29 states and 1555 transitions. [2021-12-17 23:19:51,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 329 transitions, 3793 flow [2021-12-17 23:19:51,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 329 transitions, 3575 flow, removed 16 selfloop flow, removed 32 redundant places. [2021-12-17 23:19:51,775 INFO L242 Difference]: Finished difference. Result has 333 places, 286 transitions, 2919 flow [2021-12-17 23:19:51,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2919, PETRI_PLACES=333, PETRI_TRANSITIONS=286} [2021-12-17 23:19:51,776 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-17 23:19:51,776 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 286 transitions, 2919 flow [2021-12-17 23:19:51,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:51,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:51,776 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] [2021-12-17 23:19:51,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 23:19:51,777 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash -439693616, now seen corresponding path program 30 times [2021-12-17 23:19:51,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:51,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963654548] [2021-12-17 23:19:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:51,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:52,125 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 23:19:52,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963654548] [2021-12-17 23:19:52,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963654548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:52,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:52,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966132059] [2021-12-17 23:19:52,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:52,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:52,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 286 transitions, 2919 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:52,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:52,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:52,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:53,231 INFO L129 PetriNetUnfolder]: 271/790 cut-off events. [2021-12-17 23:19:53,231 INFO L130 PetriNetUnfolder]: For 6066/6066 co-relation queries the response was YES. [2021-12-17 23:19:53,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 790 events. 271/790 cut-off events. For 6066/6066 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4015 event pairs, 19 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 4592. Up to 474 conditions per place. [2021-12-17 23:19:53,238 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 152 selfloop transitions, 119 changer transitions 17/327 dead transitions. [2021-12-17 23:19:53,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 327 transitions, 3830 flow [2021-12-17 23:19:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:19:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:19:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-17 23:19:53,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-17 23:19:53,241 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-17 23:19:53,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-17 23:19:53,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:53,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-17 23:19:53,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 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 23:19:53,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:53,246 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:19:53,246 INFO L186 Difference]: Start difference. First operand has 333 places, 286 transitions, 2919 flow. Second operand 33 states and 1758 transitions. [2021-12-17 23:19:53,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 327 transitions, 3830 flow [2021-12-17 23:19:53,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 327 transitions, 3458 flow, removed 60 selfloop flow, removed 28 redundant places. [2021-12-17 23:19:53,290 INFO L242 Difference]: Finished difference. Result has 338 places, 288 transitions, 2900 flow [2021-12-17 23:19:53,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2900, PETRI_PLACES=338, PETRI_TRANSITIONS=288} [2021-12-17 23:19:53,291 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-17 23:19:53,291 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 288 transitions, 2900 flow [2021-12-17 23:19:53,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:53,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:53,292 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] [2021-12-17 23:19:53,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 23:19:53,292 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:53,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1178169136, now seen corresponding path program 31 times [2021-12-17 23:19:53,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:53,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463008968] [2021-12-17 23:19:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:53,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:53,648 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 23:19:53,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:53,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463008968] [2021-12-17 23:19:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463008968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:53,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:53,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:53,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668169028] [2021-12-17 23:19:53,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:53,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:53,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:53,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:53,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 288 transitions, 2900 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:53,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:53,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:53,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:54,889 INFO L129 PetriNetUnfolder]: 269/783 cut-off events. [2021-12-17 23:19:54,889 INFO L130 PetriNetUnfolder]: For 4995/4995 co-relation queries the response was YES. [2021-12-17 23:19:54,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 783 events. 269/783 cut-off events. For 4995/4995 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3948 event pairs, 20 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 4421. Up to 474 conditions per place. [2021-12-17 23:19:54,900 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 150 selfloop transitions, 109 changer transitions 25/323 dead transitions. [2021-12-17 23:19:54,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 323 transitions, 3727 flow [2021-12-17 23:19:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:19:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:19:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1703 transitions. [2021-12-17 23:19:54,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566156914893617 [2021-12-17 23:19:54,903 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1703 transitions. [2021-12-17 23:19:54,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1703 transitions. [2021-12-17 23:19:54,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:54,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1703 transitions. [2021-12-17 23:19:54,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.21875) internal successors, (1703), 32 states have internal predecessors, (1703), 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 23:19:54,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:54,907 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:54,908 INFO L186 Difference]: Start difference. First operand has 338 places, 288 transitions, 2900 flow. Second operand 32 states and 1703 transitions. [2021-12-17 23:19:54,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 323 transitions, 3727 flow [2021-12-17 23:19:54,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 323 transitions, 3449 flow, removed 30 selfloop flow, removed 26 redundant places. [2021-12-17 23:19:54,954 INFO L242 Difference]: Finished difference. Result has 344 places, 277 transitions, 2813 flow [2021-12-17 23:19:54,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2813, PETRI_PLACES=344, PETRI_TRANSITIONS=277} [2021-12-17 23:19:54,955 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 256 predicate places. [2021-12-17 23:19:54,955 INFO L470 AbstractCegarLoop]: Abstraction has has 344 places, 277 transitions, 2813 flow [2021-12-17 23:19:54,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:54,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:54,955 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] [2021-12-17 23:19:54,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 23:19:54,956 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 400484758, now seen corresponding path program 32 times [2021-12-17 23:19:54,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:54,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519077002] [2021-12-17 23:19:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:54,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:55,276 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 23:19:55,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519077002] [2021-12-17 23:19:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519077002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:55,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:55,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:55,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565240418] [2021-12-17 23:19:55,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:55,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:55,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:55,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:55,278 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:55,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 277 transitions, 2813 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:55,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:55,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:55,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:57,473 INFO L129 PetriNetUnfolder]: 262/761 cut-off events. [2021-12-17 23:19:57,473 INFO L130 PetriNetUnfolder]: For 5125/5125 co-relation queries the response was YES. [2021-12-17 23:19:57,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 761 events. 262/761 cut-off events. For 5125/5125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3810 event pairs, 18 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4394. Up to 494 conditions per place. [2021-12-17 23:19:57,482 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 92 changer transitions 15/309 dead transitions. [2021-12-17 23:19:57,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 309 transitions, 3593 flow [2021-12-17 23:19:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:19:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:19:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1694 transitions. [2021-12-17 23:19:57,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631648936170213 [2021-12-17 23:19:57,484 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1694 transitions. [2021-12-17 23:19:57,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1694 transitions. [2021-12-17 23:19:57,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:57,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1694 transitions. [2021-12-17 23:19:57,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.9375) internal successors, (1694), 32 states have internal predecessors, (1694), 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 23:19:57,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:57,488 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:19:57,488 INFO L186 Difference]: Start difference. First operand has 344 places, 277 transitions, 2813 flow. Second operand 32 states and 1694 transitions. [2021-12-17 23:19:57,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 309 transitions, 3593 flow [2021-12-17 23:19:57,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 309 transitions, 3256 flow, removed 28 selfloop flow, removed 36 redundant places. [2021-12-17 23:19:57,523 INFO L242 Difference]: Finished difference. Result has 336 places, 276 transitions, 2698 flow [2021-12-17 23:19:57,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2698, PETRI_PLACES=336, PETRI_TRANSITIONS=276} [2021-12-17 23:19:57,523 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 248 predicate places. [2021-12-17 23:19:57,524 INFO L470 AbstractCegarLoop]: Abstraction has has 336 places, 276 transitions, 2698 flow [2021-12-17 23:19:57,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:57,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:57,524 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] [2021-12-17 23:19:57,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 23:19:57,524 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:57,525 INFO L85 PathProgramCache]: Analyzing trace with hash 145279624, now seen corresponding path program 33 times [2021-12-17 23:19:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:57,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525401290] [2021-12-17 23:19:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:57,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:57,911 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 23:19:57,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525401290] [2021-12-17 23:19:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525401290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:57,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:19:57,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386997791] [2021-12-17 23:19:57,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:57,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:19:57,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:19:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:19:57,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:57,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 276 transitions, 2698 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:57,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:57,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:57,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:58,854 INFO L129 PetriNetUnfolder]: 257/748 cut-off events. [2021-12-17 23:19:58,854 INFO L130 PetriNetUnfolder]: For 4872/4872 co-relation queries the response was YES. [2021-12-17 23:19:58,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 748 events. 257/748 cut-off events. For 4872/4872 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3729 event pairs, 20 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 4239. Up to 461 conditions per place. [2021-12-17 23:19:58,861 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 106 changer transitions 20/306 dead transitions. [2021-12-17 23:19:58,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 306 transitions, 3432 flow [2021-12-17 23:19:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:19:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:19:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1600 transitions. [2021-12-17 23:19:58,862 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2021-12-17 23:19:58,863 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1600 transitions. [2021-12-17 23:19:58,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1600 transitions. [2021-12-17 23:19:58,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:58,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1600 transitions. [2021-12-17 23:19:58,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.333333333333336) internal successors, (1600), 30 states have internal predecessors, (1600), 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 23:19:58,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:58,867 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:19:58,867 INFO L186 Difference]: Start difference. First operand has 336 places, 276 transitions, 2698 flow. Second operand 30 states and 1600 transitions. [2021-12-17 23:19:58,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 306 transitions, 3432 flow [2021-12-17 23:19:58,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 306 transitions, 3217 flow, removed 15 selfloop flow, removed 31 redundant places. [2021-12-17 23:19:58,908 INFO L242 Difference]: Finished difference. Result has 333 places, 268 transitions, 2667 flow [2021-12-17 23:19:58,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2667, PETRI_PLACES=333, PETRI_TRANSITIONS=268} [2021-12-17 23:19:58,909 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-17 23:19:58,909 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 268 transitions, 2667 flow [2021-12-17 23:19:58,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:19:58,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:58,910 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] [2021-12-17 23:19:58,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 23:19:58,910 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1614481682, now seen corresponding path program 34 times [2021-12-17 23:19:58,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063306190] [2021-12-17 23:19:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:58,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:59,253 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 23:19:59,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063306190] [2021-12-17 23:19:59,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063306190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:59,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:59,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:19:59,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374347715] [2021-12-17 23:19:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:59,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:19:59,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:19:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:19:59,256 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:19:59,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 268 transitions, 2667 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:19:59,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:59,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:19:59,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:00,337 INFO L129 PetriNetUnfolder]: 249/716 cut-off events. [2021-12-17 23:20:00,337 INFO L130 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2021-12-17 23:20:00,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4192 conditions, 716 events. 249/716 cut-off events. For 4476/4476 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3471 event pairs, 18 based on Foata normal form. 1/714 useless extension candidates. Maximal degree in co-relation 4086. Up to 456 conditions per place. [2021-12-17 23:20:00,344 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 98 changer transitions 17/295 dead transitions. [2021-12-17 23:20:00,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 295 transitions, 3322 flow [2021-12-17 23:20:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:20:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:20:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1593 transitions. [2021-12-17 23:20:00,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5648936170212766 [2021-12-17 23:20:00,345 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1593 transitions. [2021-12-17 23:20:00,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1593 transitions. [2021-12-17 23:20:00,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:00,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1593 transitions. [2021-12-17 23:20:00,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.1) internal successors, (1593), 30 states have internal predecessors, (1593), 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 23:20:00,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:20:00,349 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:20:00,349 INFO L186 Difference]: Start difference. First operand has 333 places, 268 transitions, 2667 flow. Second operand 30 states and 1593 transitions. [2021-12-17 23:20:00,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 295 transitions, 3322 flow [2021-12-17 23:20:00,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 295 transitions, 3035 flow, removed 11 selfloop flow, removed 32 redundant places. [2021-12-17 23:20:00,388 INFO L242 Difference]: Finished difference. Result has 323 places, 261 transitions, 2546 flow [2021-12-17 23:20:00,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2546, PETRI_PLACES=323, PETRI_TRANSITIONS=261} [2021-12-17 23:20:00,388 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 235 predicate places. [2021-12-17 23:20:00,389 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 261 transitions, 2546 flow [2021-12-17 23:20:00,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:00,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:00,389 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] [2021-12-17 23:20:00,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 23:20:00,389 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1987275834, now seen corresponding path program 35 times [2021-12-17 23:20:00,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:00,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710159656] [2021-12-17 23:20:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:00,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:00,728 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 23:20:00,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:00,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710159656] [2021-12-17 23:20:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710159656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:00,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:00,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:00,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011159315] [2021-12-17 23:20:00,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:00,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:00,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:00,729 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:00,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 261 transitions, 2546 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:00,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:00,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:00,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:01,720 INFO L129 PetriNetUnfolder]: 247/706 cut-off events. [2021-12-17 23:20:01,720 INFO L130 PetriNetUnfolder]: For 3899/3899 co-relation queries the response was YES. [2021-12-17 23:20:01,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 706 events. 247/706 cut-off events. For 3899/3899 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3379 event pairs, 19 based on Foata normal form. 1/704 useless extension candidates. Maximal degree in co-relation 3951. Up to 460 conditions per place. [2021-12-17 23:20:01,728 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 148 selfloop transitions, 77 changer transitions 23/287 dead transitions. [2021-12-17 23:20:01,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 287 transitions, 3177 flow [2021-12-17 23:20:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:20:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:20:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1588 transitions. [2021-12-17 23:20:01,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2021-12-17 23:20:01,729 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1588 transitions. [2021-12-17 23:20:01,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1588 transitions. [2021-12-17 23:20:01,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:01,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1588 transitions. [2021-12-17 23:20:01,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.93333333333333) internal successors, (1588), 30 states have internal predecessors, (1588), 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 23:20:01,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:20:01,734 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:20:01,734 INFO L186 Difference]: Start difference. First operand has 323 places, 261 transitions, 2546 flow. Second operand 30 states and 1588 transitions. [2021-12-17 23:20:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 287 transitions, 3177 flow [2021-12-17 23:20:01,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 287 transitions, 2870 flow, removed 13 selfloop flow, removed 28 redundant places. [2021-12-17 23:20:01,769 INFO L242 Difference]: Finished difference. Result has 314 places, 249 transitions, 2275 flow [2021-12-17 23:20:01,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2275, PETRI_PLACES=314, PETRI_TRANSITIONS=249} [2021-12-17 23:20:01,770 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 226 predicate places. [2021-12-17 23:20:01,770 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 249 transitions, 2275 flow [2021-12-17 23:20:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:01,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:01,771 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] [2021-12-17 23:20:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 23:20:01,771 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1554589640, now seen corresponding path program 36 times [2021-12-17 23:20:01,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:01,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542534117] [2021-12-17 23:20:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:01,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:02,151 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 23:20:02,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:02,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542534117] [2021-12-17 23:20:02,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542534117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:02,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:02,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:02,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192759473] [2021-12-17 23:20:02,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:02,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:02,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:02,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:02,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 249 transitions, 2275 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:02,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:02,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:02,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:03,336 INFO L129 PetriNetUnfolder]: 245/699 cut-off events. [2021-12-17 23:20:03,336 INFO L130 PetriNetUnfolder]: For 3698/3698 co-relation queries the response was YES. [2021-12-17 23:20:03,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3868 conditions, 699 events. 245/699 cut-off events. For 3698/3698 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3317 event pairs, 17 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 3770. Up to 454 conditions per place. [2021-12-17 23:20:03,346 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 87 changer transitions 16/283 dead transitions. [2021-12-17 23:20:03,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 283 transitions, 3002 flow [2021-12-17 23:20:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:20:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:20:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1841 transitions. [2021-12-17 23:20:03,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-12-17 23:20:03,348 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1841 transitions. [2021-12-17 23:20:03,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1841 transitions. [2021-12-17 23:20:03,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:03,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1841 transitions. [2021-12-17 23:20:03,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.6) internal successors, (1841), 35 states have internal predecessors, (1841), 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 23:20:03,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:20:03,354 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:20:03,354 INFO L186 Difference]: Start difference. First operand has 314 places, 249 transitions, 2275 flow. Second operand 35 states and 1841 transitions. [2021-12-17 23:20:03,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 283 transitions, 3002 flow [2021-12-17 23:20:03,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 283 transitions, 2717 flow, removed 20 selfloop flow, removed 34 redundant places. [2021-12-17 23:20:03,387 INFO L242 Difference]: Finished difference. Result has 303 places, 251 transitions, 2242 flow [2021-12-17 23:20:03,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2242, PETRI_PLACES=303, PETRI_TRANSITIONS=251} [2021-12-17 23:20:03,388 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 215 predicate places. [2021-12-17 23:20:03,388 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 251 transitions, 2242 flow [2021-12-17 23:20:03,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:03,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:03,389 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] [2021-12-17 23:20:03,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 23:20:03,389 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash 141646928, now seen corresponding path program 37 times [2021-12-17 23:20:03,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:03,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866464549] [2021-12-17 23:20:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:03,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:03,736 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 23:20:03,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:03,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866464549] [2021-12-17 23:20:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866464549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:03,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:03,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978244217] [2021-12-17 23:20:03,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:03,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:03,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:03,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 251 transitions, 2242 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:03,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:03,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:03,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:04,896 INFO L129 PetriNetUnfolder]: 240/678 cut-off events. [2021-12-17 23:20:04,896 INFO L130 PetriNetUnfolder]: For 3710/3710 co-relation queries the response was YES. [2021-12-17 23:20:04,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 678 events. 240/678 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3150 event pairs, 19 based on Foata normal form. 1/676 useless extension candidates. Maximal degree in co-relation 3665. Up to 450 conditions per place. [2021-12-17 23:20:04,905 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 139 selfloop transitions, 73 changer transitions 23/274 dead transitions. [2021-12-17 23:20:04,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 274 transitions, 2835 flow [2021-12-17 23:20:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:20:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:20:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1685 transitions. [2021-12-17 23:20:04,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601728723404256 [2021-12-17 23:20:04,908 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1685 transitions. [2021-12-17 23:20:04,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1685 transitions. [2021-12-17 23:20:04,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:04,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1685 transitions. [2021-12-17 23:20:04,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.65625) internal successors, (1685), 32 states have internal predecessors, (1685), 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 23:20:04,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:04,912 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:04,913 INFO L186 Difference]: Start difference. First operand has 303 places, 251 transitions, 2242 flow. Second operand 32 states and 1685 transitions. [2021-12-17 23:20:04,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 274 transitions, 2835 flow [2021-12-17 23:20:04,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 274 transitions, 2597 flow, removed 31 selfloop flow, removed 30 redundant places. [2021-12-17 23:20:04,941 INFO L242 Difference]: Finished difference. Result has 302 places, 237 transitions, 2050 flow [2021-12-17 23:20:04,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2050, PETRI_PLACES=302, PETRI_TRANSITIONS=237} [2021-12-17 23:20:04,942 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 214 predicate places. [2021-12-17 23:20:04,943 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 237 transitions, 2050 flow [2021-12-17 23:20:04,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:04,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:04,943 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] [2021-12-17 23:20:04,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 23:20:04,943 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1861913176, now seen corresponding path program 38 times [2021-12-17 23:20:04,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:04,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742696325] [2021-12-17 23:20:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:04,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:05,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742696325] [2021-12-17 23:20:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742696325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:05,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:05,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889603034] [2021-12-17 23:20:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:05,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:05,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:05,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:05,288 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:05,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 237 transitions, 2050 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:05,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:05,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:05,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:08,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:20:08,935 INFO L129 PetriNetUnfolder]: 240/670 cut-off events. [2021-12-17 23:20:08,936 INFO L130 PetriNetUnfolder]: For 3545/3545 co-relation queries the response was YES. [2021-12-17 23:20:08,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 670 events. 240/670 cut-off events. For 3545/3545 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3094 event pairs, 19 based on Foata normal form. 1/669 useless extension candidates. Maximal degree in co-relation 3576. Up to 447 conditions per place. [2021-12-17 23:20:08,942 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 135 selfloop transitions, 80 changer transitions 16/270 dead transitions. [2021-12-17 23:20:08,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 270 transitions, 2751 flow [2021-12-17 23:20:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:20:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:20:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1837 transitions. [2021-12-17 23:20:08,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583586626139818 [2021-12-17 23:20:08,944 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1837 transitions. [2021-12-17 23:20:08,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1837 transitions. [2021-12-17 23:20:08,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:08,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1837 transitions. [2021-12-17 23:20:08,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.48571428571429) internal successors, (1837), 35 states have internal predecessors, (1837), 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 23:20:08,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:20:08,949 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:20:08,949 INFO L186 Difference]: Start difference. First operand has 302 places, 237 transitions, 2050 flow. Second operand 35 states and 1837 transitions. [2021-12-17 23:20:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 270 transitions, 2751 flow [2021-12-17 23:20:08,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 270 transitions, 2463 flow, removed 35 selfloop flow, removed 36 redundant places. [2021-12-17 23:20:08,983 INFO L242 Difference]: Finished difference. Result has 284 places, 239 transitions, 2014 flow [2021-12-17 23:20:08,984 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2014, PETRI_PLACES=284, PETRI_TRANSITIONS=239} [2021-12-17 23:20:08,984 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 196 predicate places. [2021-12-17 23:20:08,985 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 239 transitions, 2014 flow [2021-12-17 23:20:08,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:08,985 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:08,985 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] [2021-12-17 23:20:08,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 23:20:08,985 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -653631182, now seen corresponding path program 39 times [2021-12-17 23:20:08,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:08,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366474075] [2021-12-17 23:20:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:08,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:09,408 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 23:20:09,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366474075] [2021-12-17 23:20:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366474075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:09,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:09,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:09,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828090659] [2021-12-17 23:20:09,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:09,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:09,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:09,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:09,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 239 transitions, 2014 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:09,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:09,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:09,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:10,816 INFO L129 PetriNetUnfolder]: 235/660 cut-off events. [2021-12-17 23:20:10,816 INFO L130 PetriNetUnfolder]: For 3221/3221 co-relation queries the response was YES. [2021-12-17 23:20:10,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 660 events. 235/660 cut-off events. For 3221/3221 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3050 event pairs, 21 based on Foata normal form. 1/658 useless extension candidates. Maximal degree in co-relation 3420. Up to 443 conditions per place. [2021-12-17 23:20:10,822 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 132 selfloop transitions, 61 changer transitions 29/261 dead transitions. [2021-12-17 23:20:10,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 261 transitions, 2569 flow [2021-12-17 23:20:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:20:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:20:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1681 transitions. [2021-12-17 23:20:10,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558843085106383 [2021-12-17 23:20:10,824 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1681 transitions. [2021-12-17 23:20:10,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1681 transitions. [2021-12-17 23:20:10,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:10,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1681 transitions. [2021-12-17 23:20:10,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.53125) internal successors, (1681), 32 states have internal predecessors, (1681), 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 23:20:10,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:10,828 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:10,828 INFO L186 Difference]: Start difference. First operand has 284 places, 239 transitions, 2014 flow. Second operand 32 states and 1681 transitions. [2021-12-17 23:20:10,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 261 transitions, 2569 flow [2021-12-17 23:20:10,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 261 transitions, 2360 flow, removed 26 selfloop flow, removed 29 redundant places. [2021-12-17 23:20:10,854 INFO L242 Difference]: Finished difference. Result has 284 places, 220 transitions, 1792 flow [2021-12-17 23:20:10,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1792, PETRI_PLACES=284, PETRI_TRANSITIONS=220} [2021-12-17 23:20:10,855 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 196 predicate places. [2021-12-17 23:20:10,855 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 220 transitions, 1792 flow [2021-12-17 23:20:10,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:10,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:10,856 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] [2021-12-17 23:20:10,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 23:20:10,856 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1113334856, now seen corresponding path program 40 times [2021-12-17 23:20:10,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:10,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778643136] [2021-12-17 23:20:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:10,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:11,225 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 23:20:11,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:11,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778643136] [2021-12-17 23:20:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778643136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:11,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:11,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:11,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723596222] [2021-12-17 23:20:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:11,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:11,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:11,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:11,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 220 transitions, 1792 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:11,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:11,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:11,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:12,426 INFO L129 PetriNetUnfolder]: 238/662 cut-off events. [2021-12-17 23:20:12,427 INFO L130 PetriNetUnfolder]: For 3357/3357 co-relation queries the response was YES. [2021-12-17 23:20:12,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 662 events. 238/662 cut-off events. For 3357/3357 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3057 event pairs, 17 based on Foata normal form. 1/661 useless extension candidates. Maximal degree in co-relation 3391. Up to 433 conditions per place. [2021-12-17 23:20:12,433 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 75 changer transitions 22/256 dead transitions. [2021-12-17 23:20:12,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 256 transitions, 2483 flow [2021-12-17 23:20:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:20:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:20:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1739 transitions. [2021-12-17 23:20:12,435 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2021-12-17 23:20:12,435 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1739 transitions. [2021-12-17 23:20:12,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1739 transitions. [2021-12-17 23:20:12,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:12,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1739 transitions. [2021-12-17 23:20:12,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.696969696969695) internal successors, (1739), 33 states have internal predecessors, (1739), 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 23:20:12,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:20:12,438 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:20:12,438 INFO L186 Difference]: Start difference. First operand has 284 places, 220 transitions, 1792 flow. Second operand 33 states and 1739 transitions. [2021-12-17 23:20:12,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 256 transitions, 2483 flow [2021-12-17 23:20:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 256 transitions, 2239 flow, removed 33 selfloop flow, removed 34 redundant places. [2021-12-17 23:20:12,454 INFO L242 Difference]: Finished difference. Result has 262 places, 220 transitions, 1766 flow [2021-12-17 23:20:12,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1766, PETRI_PLACES=262, PETRI_TRANSITIONS=220} [2021-12-17 23:20:12,455 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 174 predicate places. [2021-12-17 23:20:12,455 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 220 transitions, 1766 flow [2021-12-17 23:20:12,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:12,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:12,455 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] [2021-12-17 23:20:12,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 23:20:12,456 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash -457638894, now seen corresponding path program 41 times [2021-12-17 23:20:12,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:12,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158378628] [2021-12-17 23:20:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:12,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:12,763 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 23:20:12,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:12,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158378628] [2021-12-17 23:20:12,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158378628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:12,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:12,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:12,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564483910] [2021-12-17 23:20:12,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:12,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:12,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:12,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:12,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:12,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 220 transitions, 1766 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:12,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:12,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:12,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:13,810 INFO L129 PetriNetUnfolder]: 231/634 cut-off events. [2021-12-17 23:20:13,810 INFO L130 PetriNetUnfolder]: For 3349/3349 co-relation queries the response was YES. [2021-12-17 23:20:13,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 634 events. 231/634 cut-off events. For 3349/3349 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2900 event pairs, 18 based on Foata normal form. 1/632 useless extension candidates. Maximal degree in co-relation 3307. Up to 434 conditions per place. [2021-12-17 23:20:13,816 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 121 selfloop transitions, 69 changer transitions 18/247 dead transitions. [2021-12-17 23:20:13,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 247 transitions, 2306 flow [2021-12-17 23:20:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:20:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:20:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1630 transitions. [2021-12-17 23:20:13,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5593685655456417 [2021-12-17 23:20:13,818 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1630 transitions. [2021-12-17 23:20:13,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1630 transitions. [2021-12-17 23:20:13,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:13,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1630 transitions. [2021-12-17 23:20:13,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.58064516129032) internal successors, (1630), 31 states have internal predecessors, (1630), 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 23:20:13,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:13,821 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:13,821 INFO L186 Difference]: Start difference. First operand has 262 places, 220 transitions, 1766 flow. Second operand 31 states and 1630 transitions. [2021-12-17 23:20:13,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 247 transitions, 2306 flow [2021-12-17 23:20:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 247 transitions, 2130 flow, removed 27 selfloop flow, removed 31 redundant places. [2021-12-17 23:20:13,840 INFO L242 Difference]: Finished difference. Result has 262 places, 217 transitions, 1742 flow [2021-12-17 23:20:13,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1742, PETRI_PLACES=262, PETRI_TRANSITIONS=217} [2021-12-17 23:20:13,840 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 174 predicate places. [2021-12-17 23:20:13,841 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 217 transitions, 1742 flow [2021-12-17 23:20:13,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:13,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:13,841 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] [2021-12-17 23:20:13,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 23:20:13,841 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2058534538, now seen corresponding path program 42 times [2021-12-17 23:20:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826750468] [2021-12-17 23:20:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:13,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:14,214 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 23:20:14,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826750468] [2021-12-17 23:20:14,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826750468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:14,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:14,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:20:14,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851193972] [2021-12-17 23:20:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:14,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:20:14,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:20:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:20:14,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:14,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 217 transitions, 1742 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:20:14,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:14,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:14,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:15,762 INFO L129 PetriNetUnfolder]: 227/617 cut-off events. [2021-12-17 23:20:15,762 INFO L130 PetriNetUnfolder]: For 3013/3013 co-relation queries the response was YES. [2021-12-17 23:20:15,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3327 conditions, 617 events. 227/617 cut-off events. For 3013/3013 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2739 event pairs, 17 based on Foata normal form. 1/615 useless extension candidates. Maximal degree in co-relation 3247. Up to 426 conditions per place. [2021-12-17 23:20:15,767 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 115 selfloop transitions, 71 changer transitions 15/240 dead transitions. [2021-12-17 23:20:15,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 240 transitions, 2276 flow [2021-12-17 23:20:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:20:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:20:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1727 transitions. [2021-12-17 23:20:15,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2021-12-17 23:20:15,769 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1727 transitions. [2021-12-17 23:20:15,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1727 transitions. [2021-12-17 23:20:15,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:15,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1727 transitions. [2021-12-17 23:20:15,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.333333333333336) internal successors, (1727), 33 states have internal predecessors, (1727), 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 23:20:15,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:20:15,773 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:20:15,773 INFO L186 Difference]: Start difference. First operand has 262 places, 217 transitions, 1742 flow. Second operand 33 states and 1727 transitions. [2021-12-17 23:20:15,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 240 transitions, 2276 flow [2021-12-17 23:20:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 240 transitions, 2062 flow, removed 12 selfloop flow, removed 32 redundant places. [2021-12-17 23:20:15,790 INFO L242 Difference]: Finished difference. Result has 259 places, 212 transitions, 1665 flow [2021-12-17 23:20:15,790 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1665, PETRI_PLACES=259, PETRI_TRANSITIONS=212} [2021-12-17 23:20:15,791 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 171 predicate places. [2021-12-17 23:20:15,791 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 212 transitions, 1665 flow [2021-12-17 23:20:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:20:15,791 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:15,791 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] [2021-12-17 23:20:15,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 23:20:15,791 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1379353922, now seen corresponding path program 43 times [2021-12-17 23:20:15,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072897161] [2021-12-17 23:20:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:15,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:16,162 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 23:20:16,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072897161] [2021-12-17 23:20:16,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072897161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:16,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:16,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:20:16,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984763062] [2021-12-17 23:20:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:16,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:20:16,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:20:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:20:16,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:16,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 212 transitions, 1665 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:20:16,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:16,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:16,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:17,173 INFO L129 PetriNetUnfolder]: 223/608 cut-off events. [2021-12-17 23:20:17,173 INFO L130 PetriNetUnfolder]: For 2982/2982 co-relation queries the response was YES. [2021-12-17 23:20:17,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 608 events. 223/608 cut-off events. For 2982/2982 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2725 event pairs, 18 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 3128. Up to 424 conditions per place. [2021-12-17 23:20:17,178 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 112 selfloop transitions, 55 changer transitions 27/233 dead transitions. [2021-12-17 23:20:17,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 233 transitions, 2138 flow [2021-12-17 23:20:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:20:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:20:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1622 transitions. [2021-12-17 23:20:17,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5566231983527797 [2021-12-17 23:20:17,180 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1622 transitions. [2021-12-17 23:20:17,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1622 transitions. [2021-12-17 23:20:17,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:17,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1622 transitions. [2021-12-17 23:20:17,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.32258064516129) internal successors, (1622), 31 states have internal predecessors, (1622), 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 23:20:17,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:17,183 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:17,183 INFO L186 Difference]: Start difference. First operand has 259 places, 212 transitions, 1665 flow. Second operand 31 states and 1622 transitions. [2021-12-17 23:20:17,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 233 transitions, 2138 flow [2021-12-17 23:20:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 233 transitions, 1904 flow, removed 12 selfloop flow, removed 33 redundant places. [2021-12-17 23:20:17,199 INFO L242 Difference]: Finished difference. Result has 252 places, 196 transitions, 1463 flow [2021-12-17 23:20:17,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1463, PETRI_PLACES=252, PETRI_TRANSITIONS=196} [2021-12-17 23:20:17,199 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 164 predicate places. [2021-12-17 23:20:17,200 INFO L470 AbstractCegarLoop]: Abstraction has has 252 places, 196 transitions, 1463 flow [2021-12-17 23:20:17,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:20:17,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:17,200 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] [2021-12-17 23:20:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 23:20:17,200 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1936159142, now seen corresponding path program 44 times [2021-12-17 23:20:17,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:17,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740599298] [2021-12-17 23:20:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:17,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:17,540 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 23:20:17,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:17,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740599298] [2021-12-17 23:20:17,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740599298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:17,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:17,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:17,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269884822] [2021-12-17 23:20:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:17,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:17,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:17,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:17,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 196 transitions, 1463 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:17,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:17,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:17,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:18,662 INFO L129 PetriNetUnfolder]: 260/729 cut-off events. [2021-12-17 23:20:18,662 INFO L130 PetriNetUnfolder]: For 3566/3566 co-relation queries the response was YES. [2021-12-17 23:20:18,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 729 events. 260/729 cut-off events. For 3566/3566 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3590 event pairs, 42 based on Foata normal form. 1/728 useless extension candidates. Maximal degree in co-relation 3576. Up to 435 conditions per place. [2021-12-17 23:20:18,668 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 115 selfloop transitions, 81 changer transitions 45/280 dead transitions. [2021-12-17 23:20:18,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 280 transitions, 2754 flow [2021-12-17 23:20:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:20:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:20:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1965 transitions. [2021-12-17 23:20:18,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5649798734905118 [2021-12-17 23:20:18,669 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1965 transitions. [2021-12-17 23:20:18,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1965 transitions. [2021-12-17 23:20:18,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:18,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1965 transitions. [2021-12-17 23:20:18,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.108108108108105) internal successors, (1965), 37 states have internal predecessors, (1965), 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 23:20:18,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:20:18,673 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:20:18,673 INFO L186 Difference]: Start difference. First operand has 252 places, 196 transitions, 1463 flow. Second operand 37 states and 1965 transitions. [2021-12-17 23:20:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 280 transitions, 2754 flow [2021-12-17 23:20:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 280 transitions, 2503 flow, removed 23 selfloop flow, removed 26 redundant places. [2021-12-17 23:20:18,687 INFO L242 Difference]: Finished difference. Result has 254 places, 221 transitions, 1845 flow [2021-12-17 23:20:18,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1845, PETRI_PLACES=254, PETRI_TRANSITIONS=221} [2021-12-17 23:20:18,687 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 166 predicate places. [2021-12-17 23:20:18,688 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 221 transitions, 1845 flow [2021-12-17 23:20:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:18,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:18,688 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] [2021-12-17 23:20:18,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 23:20:18,688 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1037193658, now seen corresponding path program 45 times [2021-12-17 23:20:18,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:18,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129276639] [2021-12-17 23:20:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:18,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:19,057 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 23:20:19,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:19,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129276639] [2021-12-17 23:20:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129276639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:19,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:19,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:19,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199664927] [2021-12-17 23:20:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:19,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:19,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:19,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:19,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 221 transitions, 1845 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:19,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:19,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:19,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:20,069 INFO L129 PetriNetUnfolder]: 258/725 cut-off events. [2021-12-17 23:20:20,069 INFO L130 PetriNetUnfolder]: For 4657/4657 co-relation queries the response was YES. [2021-12-17 23:20:20,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3895 conditions, 725 events. 258/725 cut-off events. For 4657/4657 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3574 event pairs, 43 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 3810. Up to 442 conditions per place. [2021-12-17 23:20:20,075 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 36/278 dead transitions. [2021-12-17 23:20:20,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 278 transitions, 2894 flow [2021-12-17 23:20:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1811 transitions. [2021-12-17 23:20:20,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5666458072590739 [2021-12-17 23:20:20,077 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1811 transitions. [2021-12-17 23:20:20,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1811 transitions. [2021-12-17 23:20:20,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:20,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1811 transitions. [2021-12-17 23:20:20,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.26470588235294) internal successors, (1811), 34 states have internal predecessors, (1811), 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 23:20:20,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:20,080 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:20,080 INFO L186 Difference]: Start difference. First operand has 254 places, 221 transitions, 1845 flow. Second operand 34 states and 1811 transitions. [2021-12-17 23:20:20,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 278 transitions, 2894 flow [2021-12-17 23:20:20,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 278 transitions, 2530 flow, removed 146 selfloop flow, removed 21 redundant places. [2021-12-17 23:20:20,100 INFO L242 Difference]: Finished difference. Result has 269 places, 228 transitions, 1896 flow [2021-12-17 23:20:20,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1896, PETRI_PLACES=269, PETRI_TRANSITIONS=228} [2021-12-17 23:20:20,100 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 181 predicate places. [2021-12-17 23:20:20,100 INFO L470 AbstractCegarLoop]: Abstraction has has 269 places, 228 transitions, 1896 flow [2021-12-17 23:20:20,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:20,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:20,101 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] [2021-12-17 23:20:20,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 23:20:20,101 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -567600750, now seen corresponding path program 46 times [2021-12-17 23:20:20,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:20,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187348974] [2021-12-17 23:20:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:20,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:20,445 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 23:20:20,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187348974] [2021-12-17 23:20:20,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187348974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:20,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:20,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:20,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052452970] [2021-12-17 23:20:20,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:20,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:20,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:20,447 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:20,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 228 transitions, 1896 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:20,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:20,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:20,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:21,600 INFO L129 PetriNetUnfolder]: 283/787 cut-off events. [2021-12-17 23:20:21,600 INFO L130 PetriNetUnfolder]: For 6001/6001 co-relation queries the response was YES. [2021-12-17 23:20:21,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4392 conditions, 787 events. 283/787 cut-off events. For 6001/6001 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3916 event pairs, 35 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 4305. Up to 494 conditions per place. [2021-12-17 23:20:21,608 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 153 selfloop transitions, 97 changer transitions 22/311 dead transitions. [2021-12-17 23:20:21,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 311 transitions, 3442 flow [2021-12-17 23:20:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:20:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:20:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2071 transitions. [2021-12-17 23:20:21,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5649208947081288 [2021-12-17 23:20:21,609 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2071 transitions. [2021-12-17 23:20:21,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2071 transitions. [2021-12-17 23:20:21,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:21,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2071 transitions. [2021-12-17 23:20:21,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.1025641025641) internal successors, (2071), 39 states have internal predecessors, (2071), 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 23:20:21,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:21,613 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:21,613 INFO L186 Difference]: Start difference. First operand has 269 places, 228 transitions, 1896 flow. Second operand 39 states and 2071 transitions. [2021-12-17 23:20:21,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 311 transitions, 3442 flow [2021-12-17 23:20:21,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 311 transitions, 3138 flow, removed 86 selfloop flow, removed 30 redundant places. [2021-12-17 23:20:21,638 INFO L242 Difference]: Finished difference. Result has 281 places, 265 transitions, 2479 flow [2021-12-17 23:20:21,638 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2479, PETRI_PLACES=281, PETRI_TRANSITIONS=265} [2021-12-17 23:20:21,638 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 193 predicate places. [2021-12-17 23:20:21,639 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 265 transitions, 2479 flow [2021-12-17 23:20:21,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:21,639 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:21,639 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] [2021-12-17 23:20:21,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 23:20:21,640 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -211797888, now seen corresponding path program 47 times [2021-12-17 23:20:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:21,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754168184] [2021-12-17 23:20:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:21,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:21,980 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 23:20:21,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:21,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754168184] [2021-12-17 23:20:21,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754168184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:21,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:21,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86442401] [2021-12-17 23:20:21,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:21,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:21,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:21,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 265 transitions, 2479 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:21,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:21,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:21,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:23,380 INFO L129 PetriNetUnfolder]: 299/842 cut-off events. [2021-12-17 23:20:23,380 INFO L130 PetriNetUnfolder]: For 7640/7640 co-relation queries the response was YES. [2021-12-17 23:20:23,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4941 conditions, 842 events. 299/842 cut-off events. For 7640/7640 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4396 event pairs, 55 based on Foata normal form. 1/841 useless extension candidates. Maximal degree in co-relation 4852. Up to 538 conditions per place. [2021-12-17 23:20:23,388 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 159 selfloop transitions, 96 changer transitions 38/332 dead transitions. [2021-12-17 23:20:23,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 332 transitions, 3792 flow [2021-12-17 23:20:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:20:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:20:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2115 transitions. [2021-12-17 23:20:23,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625 [2021-12-17 23:20:23,389 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2115 transitions. [2021-12-17 23:20:23,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2115 transitions. [2021-12-17 23:20:23,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:23,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2115 transitions. [2021-12-17 23:20:23,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.875) internal successors, (2115), 40 states have internal predecessors, (2115), 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 23:20:23,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:20:23,393 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:20:23,393 INFO L186 Difference]: Start difference. First operand has 281 places, 265 transitions, 2479 flow. Second operand 40 states and 2115 transitions. [2021-12-17 23:20:23,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 332 transitions, 3792 flow [2021-12-17 23:20:23,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 332 transitions, 3302 flow, removed 208 selfloop flow, removed 17 redundant places. [2021-12-17 23:20:23,424 INFO L242 Difference]: Finished difference. Result has 311 places, 281 transitions, 2537 flow [2021-12-17 23:20:23,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2537, PETRI_PLACES=311, PETRI_TRANSITIONS=281} [2021-12-17 23:20:23,425 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 223 predicate places. [2021-12-17 23:20:23,425 INFO L470 AbstractCegarLoop]: Abstraction has has 311 places, 281 transitions, 2537 flow [2021-12-17 23:20:23,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:23,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:23,426 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] [2021-12-17 23:20:23,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 23:20:23,426 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2109494696, now seen corresponding path program 48 times [2021-12-17 23:20:23,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:23,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078918272] [2021-12-17 23:20:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:23,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:23,743 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 23:20:23,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078918272] [2021-12-17 23:20:23,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078918272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:23,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:23,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:23,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148323654] [2021-12-17 23:20:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:23,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:23,744 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:23,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 281 transitions, 2537 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:23,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:23,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:23,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:24,790 INFO L129 PetriNetUnfolder]: 305/837 cut-off events. [2021-12-17 23:20:24,790 INFO L130 PetriNetUnfolder]: For 8148/8148 co-relation queries the response was YES. [2021-12-17 23:20:24,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5185 conditions, 837 events. 305/837 cut-off events. For 8148/8148 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4383 event pairs, 33 based on Foata normal form. 1/835 useless extension candidates. Maximal degree in co-relation 5084. Up to 536 conditions per place. [2021-12-17 23:20:24,798 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 176 selfloop transitions, 94 changer transitions 40/349 dead transitions. [2021-12-17 23:20:24,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 349 transitions, 3909 flow [2021-12-17 23:20:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:20:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:20:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1659 transitions. [2021-12-17 23:20:24,800 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5693205216197667 [2021-12-17 23:20:24,800 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1659 transitions. [2021-12-17 23:20:24,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1659 transitions. [2021-12-17 23:20:24,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:24,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1659 transitions. [2021-12-17 23:20:24,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.516129032258064) internal successors, (1659), 31 states have internal predecessors, (1659), 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 23:20:24,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:24,803 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:20:24,803 INFO L186 Difference]: Start difference. First operand has 311 places, 281 transitions, 2537 flow. Second operand 31 states and 1659 transitions. [2021-12-17 23:20:24,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 349 transitions, 3909 flow [2021-12-17 23:20:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 349 transitions, 3490 flow, removed 150 selfloop flow, removed 31 redundant places. [2021-12-17 23:20:24,840 INFO L242 Difference]: Finished difference. Result has 315 places, 292 transitions, 2680 flow [2021-12-17 23:20:24,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2680, PETRI_PLACES=315, PETRI_TRANSITIONS=292} [2021-12-17 23:20:24,841 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 227 predicate places. [2021-12-17 23:20:24,841 INFO L470 AbstractCegarLoop]: Abstraction has has 315 places, 292 transitions, 2680 flow [2021-12-17 23:20:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:24,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:24,841 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] [2021-12-17 23:20:24,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 23:20:24,842 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1665187988, now seen corresponding path program 49 times [2021-12-17 23:20:24,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916083462] [2021-12-17 23:20:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:24,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:25,152 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 23:20:25,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916083462] [2021-12-17 23:20:25,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916083462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:25,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:25,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:25,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781068983] [2021-12-17 23:20:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:25,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:25,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:25,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:25,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 292 transitions, 2680 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:25,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:25,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:25,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:26,278 INFO L129 PetriNetUnfolder]: 298/869 cut-off events. [2021-12-17 23:20:26,278 INFO L130 PetriNetUnfolder]: For 8741/8741 co-relation queries the response was YES. [2021-12-17 23:20:26,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 869 events. 298/869 cut-off events. For 8741/8741 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4681 event pairs, 50 based on Foata normal form. 1/868 useless extension candidates. Maximal degree in co-relation 5131. Up to 533 conditions per place. [2021-12-17 23:20:26,287 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 95 changer transitions 39/336 dead transitions. [2021-12-17 23:20:26,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 336 transitions, 3688 flow [2021-12-17 23:20:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:20:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:20:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1909 transitions. [2021-12-17 23:20:26,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641252955082743 [2021-12-17 23:20:26,289 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1909 transitions. [2021-12-17 23:20:26,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1909 transitions. [2021-12-17 23:20:26,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:26,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1909 transitions. [2021-12-17 23:20:26,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.02777777777778) internal successors, (1909), 36 states have internal predecessors, (1909), 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 23:20:26,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:26,292 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:26,292 INFO L186 Difference]: Start difference. First operand has 315 places, 292 transitions, 2680 flow. Second operand 36 states and 1909 transitions. [2021-12-17 23:20:26,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 336 transitions, 3688 flow [2021-12-17 23:20:26,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 336 transitions, 3483 flow, removed 55 selfloop flow, removed 26 redundant places. [2021-12-17 23:20:26,349 INFO L242 Difference]: Finished difference. Result has 325 places, 285 transitions, 2718 flow [2021-12-17 23:20:26,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2718, PETRI_PLACES=325, PETRI_TRANSITIONS=285} [2021-12-17 23:20:26,349 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 237 predicate places. [2021-12-17 23:20:26,349 INFO L470 AbstractCegarLoop]: Abstraction has has 325 places, 285 transitions, 2718 flow [2021-12-17 23:20:26,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:26,350 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:26,350 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] [2021-12-17 23:20:26,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 23:20:26,350 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1637791244, now seen corresponding path program 50 times [2021-12-17 23:20:26,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733112352] [2021-12-17 23:20:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:26,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:26,715 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 23:20:26,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733112352] [2021-12-17 23:20:26,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733112352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:26,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:26,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:20:26,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929436879] [2021-12-17 23:20:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:26,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:20:26,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:20:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:20:26,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:26,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 285 transitions, 2718 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:20:26,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:26,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:26,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:27,801 INFO L129 PetriNetUnfolder]: 298/870 cut-off events. [2021-12-17 23:20:27,801 INFO L130 PetriNetUnfolder]: For 8573/8573 co-relation queries the response was YES. [2021-12-17 23:20:27,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 870 events. 298/870 cut-off events. For 8573/8573 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4665 event pairs, 47 based on Foata normal form. 1/869 useless extension candidates. Maximal degree in co-relation 5224. Up to 555 conditions per place. [2021-12-17 23:20:27,809 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 184 selfloop transitions, 86 changer transitions 30/339 dead transitions. [2021-12-17 23:20:27,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 339 transitions, 3903 flow [2021-12-17 23:20:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1814 transitions. [2021-12-17 23:20:27,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.567584480600751 [2021-12-17 23:20:27,811 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1814 transitions. [2021-12-17 23:20:27,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1814 transitions. [2021-12-17 23:20:27,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:27,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1814 transitions. [2021-12-17 23:20:27,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.35294117647059) internal successors, (1814), 34 states have internal predecessors, (1814), 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 23:20:27,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:27,815 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:27,816 INFO L186 Difference]: Start difference. First operand has 325 places, 285 transitions, 2718 flow. Second operand 34 states and 1814 transitions. [2021-12-17 23:20:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 339 transitions, 3903 flow [2021-12-17 23:20:27,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 339 transitions, 3595 flow, removed 32 selfloop flow, removed 41 redundant places. [2021-12-17 23:20:27,854 INFO L242 Difference]: Finished difference. Result has 316 places, 293 transitions, 2793 flow [2021-12-17 23:20:27,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2793, PETRI_PLACES=316, PETRI_TRANSITIONS=293} [2021-12-17 23:20:27,854 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 228 predicate places. [2021-12-17 23:20:27,854 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 293 transitions, 2793 flow [2021-12-17 23:20:27,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:20:27,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:27,855 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] [2021-12-17 23:20:27,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 23:20:27,855 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2112350610, now seen corresponding path program 51 times [2021-12-17 23:20:27,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578744316] [2021-12-17 23:20:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:27,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:28,169 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 23:20:28,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:28,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578744316] [2021-12-17 23:20:28,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578744316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:28,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:28,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:28,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288885302] [2021-12-17 23:20:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:28,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:28,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:28,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:28,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 293 transitions, 2793 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:28,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:28,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:28,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:29,349 INFO L129 PetriNetUnfolder]: 317/925 cut-off events. [2021-12-17 23:20:29,349 INFO L130 PetriNetUnfolder]: For 9688/9688 co-relation queries the response was YES. [2021-12-17 23:20:29,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5686 conditions, 925 events. 317/925 cut-off events. For 9688/9688 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4988 event pairs, 54 based on Foata normal form. 1/924 useless extension candidates. Maximal degree in co-relation 5583. Up to 572 conditions per place. [2021-12-17 23:20:29,359 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 197 selfloop transitions, 108 changer transitions 24/368 dead transitions. [2021-12-17 23:20:29,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 368 transitions, 4501 flow [2021-12-17 23:20:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:20:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:20:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1970 transitions. [2021-12-17 23:20:29,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664174813110984 [2021-12-17 23:20:29,360 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1970 transitions. [2021-12-17 23:20:29,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1970 transitions. [2021-12-17 23:20:29,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:29,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1970 transitions. [2021-12-17 23:20:29,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.24324324324324) internal successors, (1970), 37 states have internal predecessors, (1970), 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 23:20:29,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:20:29,364 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:20:29,364 INFO L186 Difference]: Start difference. First operand has 316 places, 293 transitions, 2793 flow. Second operand 37 states and 1970 transitions. [2021-12-17 23:20:29,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 368 transitions, 4501 flow [2021-12-17 23:20:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 368 transitions, 4199 flow, removed 86 selfloop flow, removed 31 redundant places. [2021-12-17 23:20:29,407 INFO L242 Difference]: Finished difference. Result has 324 places, 320 transitions, 3331 flow [2021-12-17 23:20:29,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3331, PETRI_PLACES=324, PETRI_TRANSITIONS=320} [2021-12-17 23:20:29,408 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 236 predicate places. [2021-12-17 23:20:29,408 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 320 transitions, 3331 flow [2021-12-17 23:20:29,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:29,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:29,408 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] [2021-12-17 23:20:29,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 23:20:29,409 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1055737332, now seen corresponding path program 52 times [2021-12-17 23:20:29,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350017705] [2021-12-17 23:20:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:29,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:29,697 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 23:20:29,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350017705] [2021-12-17 23:20:29,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350017705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:29,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:29,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:20:29,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740877980] [2021-12-17 23:20:29,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:29,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:20:29,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:20:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:20:29,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:29,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 320 transitions, 3331 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:20:29,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:29,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:29,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:30,997 INFO L129 PetriNetUnfolder]: 325/937 cut-off events. [2021-12-17 23:20:30,998 INFO L130 PetriNetUnfolder]: For 10838/10838 co-relation queries the response was YES. [2021-12-17 23:20:31,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 937 events. 325/937 cut-off events. For 10838/10838 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5117 event pairs, 54 based on Foata normal form. 1/936 useless extension candidates. Maximal degree in co-relation 5913. Up to 598 conditions per place. [2021-12-17 23:20:31,008 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 210 selfloop transitions, 96 changer transitions 30/375 dead transitions. [2021-12-17 23:20:31,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 375 transitions, 4702 flow [2021-12-17 23:20:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:20:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:20:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1712 transitions. [2021-12-17 23:20:31,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2021-12-17 23:20:31,009 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1712 transitions. [2021-12-17 23:20:31,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1712 transitions. [2021-12-17 23:20:31,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:31,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1712 transitions. [2021-12-17 23:20:31,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.5) internal successors, (1712), 32 states have internal predecessors, (1712), 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 23:20:31,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:31,013 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:20:31,013 INFO L186 Difference]: Start difference. First operand has 324 places, 320 transitions, 3331 flow. Second operand 32 states and 1712 transitions. [2021-12-17 23:20:31,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 375 transitions, 4702 flow [2021-12-17 23:20:31,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 375 transitions, 4189 flow, removed 211 selfloop flow, removed 18 redundant places. [2021-12-17 23:20:31,069 INFO L242 Difference]: Finished difference. Result has 341 places, 328 transitions, 3290 flow [2021-12-17 23:20:31,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3290, PETRI_PLACES=341, PETRI_TRANSITIONS=328} [2021-12-17 23:20:31,069 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 253 predicate places. [2021-12-17 23:20:31,070 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 328 transitions, 3290 flow [2021-12-17 23:20:31,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:20:31,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:31,070 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] [2021-12-17 23:20:31,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 23:20:31,070 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1334758656, now seen corresponding path program 53 times [2021-12-17 23:20:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096305955] [2021-12-17 23:20:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:31,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:31,415 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 23:20:31,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096305955] [2021-12-17 23:20:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096305955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:31,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:31,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:31,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332973473] [2021-12-17 23:20:31,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:31,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:31,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:31,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 328 transitions, 3290 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:31,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:31,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:31,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:32,603 INFO L129 PetriNetUnfolder]: 323/931 cut-off events. [2021-12-17 23:20:32,603 INFO L130 PetriNetUnfolder]: For 10898/10898 co-relation queries the response was YES. [2021-12-17 23:20:32,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5973 conditions, 931 events. 323/931 cut-off events. For 10898/10898 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5109 event pairs, 50 based on Foata normal form. 1/930 useless extension candidates. Maximal degree in co-relation 5862. Up to 588 conditions per place. [2021-12-17 23:20:32,614 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 204 selfloop transitions, 92 changer transitions 40/375 dead transitions. [2021-12-17 23:20:32,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 375 transitions, 4485 flow [2021-12-17 23:20:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2021-12-17 23:20:32,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2021-12-17 23:20:32,615 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2021-12-17 23:20:32,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2021-12-17 23:20:32,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:32,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2021-12-17 23:20:32,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 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 23:20:32,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:32,618 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:32,618 INFO L186 Difference]: Start difference. First operand has 341 places, 328 transitions, 3290 flow. Second operand 34 states and 1810 transitions. [2021-12-17 23:20:32,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 375 transitions, 4485 flow [2021-12-17 23:20:32,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 375 transitions, 4183 flow, removed 75 selfloop flow, removed 28 redundant places. [2021-12-17 23:20:32,670 INFO L242 Difference]: Finished difference. Result has 351 places, 322 transitions, 3236 flow [2021-12-17 23:20:32,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3236, PETRI_PLACES=351, PETRI_TRANSITIONS=322} [2021-12-17 23:20:32,671 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 263 predicate places. [2021-12-17 23:20:32,671 INFO L470 AbstractCegarLoop]: Abstraction has has 351 places, 322 transitions, 3236 flow [2021-12-17 23:20:32,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:32,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:32,671 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] [2021-12-17 23:20:32,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 23:20:32,671 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1044700428, now seen corresponding path program 54 times [2021-12-17 23:20:32,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321781347] [2021-12-17 23:20:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:32,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:32,980 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 23:20:32,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321781347] [2021-12-17 23:20:32,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321781347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:32,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:32,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:32,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947927670] [2021-12-17 23:20:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:32,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:32,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:32,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:32,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 322 transitions, 3236 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:32,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:32,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:32,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:34,094 INFO L129 PetriNetUnfolder]: 324/926 cut-off events. [2021-12-17 23:20:34,095 INFO L130 PetriNetUnfolder]: For 10555/10555 co-relation queries the response was YES. [2021-12-17 23:20:34,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6025 conditions, 926 events. 324/926 cut-off events. For 10555/10555 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5037 event pairs, 61 based on Foata normal form. 1/925 useless extension candidates. Maximal degree in co-relation 5911. Up to 624 conditions per place. [2021-12-17 23:20:34,108 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 221 selfloop transitions, 85 changer transitions 34/379 dead transitions. [2021-12-17 23:20:34,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 379 transitions, 4539 flow [2021-12-17 23:20:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:20:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:20:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-12-17 23:20:34,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-12-17 23:20:34,111 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-12-17 23:20:34,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-12-17 23:20:34,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:34,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-12-17 23:20:34,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 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 23:20:34,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:34,116 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:34,116 INFO L186 Difference]: Start difference. First operand has 351 places, 322 transitions, 3236 flow. Second operand 36 states and 1910 transitions. [2021-12-17 23:20:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 379 transitions, 4539 flow [2021-12-17 23:20:34,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 379 transitions, 4194 flow, removed 64 selfloop flow, removed 33 redundant places. [2021-12-17 23:20:34,181 INFO L242 Difference]: Finished difference. Result has 356 places, 332 transitions, 3331 flow [2021-12-17 23:20:34,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3331, PETRI_PLACES=356, PETRI_TRANSITIONS=332} [2021-12-17 23:20:34,182 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 268 predicate places. [2021-12-17 23:20:34,182 INFO L470 AbstractCegarLoop]: Abstraction has has 356 places, 332 transitions, 3331 flow [2021-12-17 23:20:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:34,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:34,183 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] [2021-12-17 23:20:34,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 23:20:34,183 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1000441418, now seen corresponding path program 55 times [2021-12-17 23:20:34,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:34,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270744855] [2021-12-17 23:20:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:34,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:34,536 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 23:20:34,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270744855] [2021-12-17 23:20:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270744855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:34,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:34,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:20:34,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907175591] [2021-12-17 23:20:34,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:34,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:20:34,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:20:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:20:34,539 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:34,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 332 transitions, 3331 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:34,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:34,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:34,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:36,282 INFO L129 PetriNetUnfolder]: 365/1044 cut-off events. [2021-12-17 23:20:36,282 INFO L130 PetriNetUnfolder]: For 12669/12669 co-relation queries the response was YES. [2021-12-17 23:20:36,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6752 conditions, 1044 events. 365/1044 cut-off events. For 12669/12669 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5894 event pairs, 35 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 6636. Up to 651 conditions per place. [2021-12-17 23:20:36,293 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 242 selfloop transitions, 156 changer transitions 22/459 dead transitions. [2021-12-17 23:20:36,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 459 transitions, 5812 flow [2021-12-17 23:20:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 23:20:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-17 23:20:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2728 transitions. [2021-12-17 23:20:36,295 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55810147299509 [2021-12-17 23:20:36,295 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2728 transitions. [2021-12-17 23:20:36,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2728 transitions. [2021-12-17 23:20:36,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:36,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2728 transitions. [2021-12-17 23:20:36,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 52.46153846153846) internal successors, (2728), 52 states have internal predecessors, (2728), 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 23:20:36,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 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 23:20:36,300 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 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 23:20:36,300 INFO L186 Difference]: Start difference. First operand has 356 places, 332 transitions, 3331 flow. Second operand 52 states and 2728 transitions. [2021-12-17 23:20:36,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 459 transitions, 5812 flow [2021-12-17 23:20:36,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 459 transitions, 5560 flow, removed 71 selfloop flow, removed 28 redundant places. [2021-12-17 23:20:36,356 INFO L242 Difference]: Finished difference. Result has 391 places, 416 transitions, 4780 flow [2021-12-17 23:20:36,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4780, PETRI_PLACES=391, PETRI_TRANSITIONS=416} [2021-12-17 23:20:36,357 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 303 predicate places. [2021-12-17 23:20:36,357 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 416 transitions, 4780 flow [2021-12-17 23:20:36,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:20:36,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:36,357 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] [2021-12-17 23:20:36,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 23:20:36,357 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 715920864, now seen corresponding path program 56 times [2021-12-17 23:20:36,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:36,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598354288] [2021-12-17 23:20:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:36,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:36,675 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 23:20:36,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:36,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598354288] [2021-12-17 23:20:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598354288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:36,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:36,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:36,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514517299] [2021-12-17 23:20:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:36,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:36,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:36,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:36,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 416 transitions, 4780 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:36,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:36,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:36,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:37,916 INFO L129 PetriNetUnfolder]: 374/1049 cut-off events. [2021-12-17 23:20:37,916 INFO L130 PetriNetUnfolder]: For 14913/14913 co-relation queries the response was YES. [2021-12-17 23:20:37,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7404 conditions, 1049 events. 374/1049 cut-off events. For 14913/14913 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6024 event pairs, 38 based on Foata normal form. 1/1047 useless extension candidates. Maximal degree in co-relation 7276. Up to 718 conditions per place. [2021-12-17 23:20:37,926 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 292 selfloop transitions, 111 changer transitions 31/473 dead transitions. [2021-12-17 23:20:37,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 473 transitions, 6386 flow [2021-12-17 23:20:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:20:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:20:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2068 transitions. [2021-12-17 23:20:37,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2021-12-17 23:20:37,928 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2068 transitions. [2021-12-17 23:20:37,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2068 transitions. [2021-12-17 23:20:37,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:37,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2068 transitions. [2021-12-17 23:20:37,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.02564102564103) internal successors, (2068), 39 states have internal predecessors, (2068), 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 23:20:37,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:37,932 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:37,932 INFO L186 Difference]: Start difference. First operand has 391 places, 416 transitions, 4780 flow. Second operand 39 states and 2068 transitions. [2021-12-17 23:20:37,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 473 transitions, 6386 flow [2021-12-17 23:20:38,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 473 transitions, 5563 flow, removed 358 selfloop flow, removed 22 redundant places. [2021-12-17 23:20:38,019 INFO L242 Difference]: Finished difference. Result has 414 places, 426 transitions, 4491 flow [2021-12-17 23:20:38,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4491, PETRI_PLACES=414, PETRI_TRANSITIONS=426} [2021-12-17 23:20:38,020 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 326 predicate places. [2021-12-17 23:20:38,020 INFO L470 AbstractCegarLoop]: Abstraction has has 414 places, 426 transitions, 4491 flow [2021-12-17 23:20:38,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:38,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:38,021 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] [2021-12-17 23:20:38,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 23:20:38,021 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 81020710, now seen corresponding path program 57 times [2021-12-17 23:20:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74998831] [2021-12-17 23:20:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:38,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:38,334 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 23:20:38,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:38,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74998831] [2021-12-17 23:20:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74998831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:38,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:38,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:38,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577045431] [2021-12-17 23:20:38,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:38,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:38,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:38,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:38,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 426 transitions, 4491 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:38,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:38,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:38,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:39,517 INFO L129 PetriNetUnfolder]: 370/1074 cut-off events. [2021-12-17 23:20:39,518 INFO L130 PetriNetUnfolder]: For 13530/13530 co-relation queries the response was YES. [2021-12-17 23:20:39,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7143 conditions, 1074 events. 370/1074 cut-off events. For 13530/13530 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6256 event pairs, 39 based on Foata normal form. 1/1073 useless extension candidates. Maximal degree in co-relation 7007. Up to 720 conditions per place. [2021-12-17 23:20:39,531 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 295 selfloop transitions, 97 changer transitions 36/467 dead transitions. [2021-12-17 23:20:39,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 467 transitions, 5760 flow [2021-12-17 23:20:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:20:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:20:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1911 transitions. [2021-12-17 23:20:39,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647163120567376 [2021-12-17 23:20:39,532 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1911 transitions. [2021-12-17 23:20:39,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1911 transitions. [2021-12-17 23:20:39,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:39,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1911 transitions. [2021-12-17 23:20:39,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.083333333333336) internal successors, (1911), 36 states have internal predecessors, (1911), 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 23:20:39,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:39,537 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:20:39,537 INFO L186 Difference]: Start difference. First operand has 414 places, 426 transitions, 4491 flow. Second operand 36 states and 1911 transitions. [2021-12-17 23:20:39,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 467 transitions, 5760 flow [2021-12-17 23:20:39,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 467 transitions, 5422 flow, removed 93 selfloop flow, removed 30 redundant places. [2021-12-17 23:20:39,657 INFO L242 Difference]: Finished difference. Result has 422 places, 419 transitions, 4388 flow [2021-12-17 23:20:39,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4388, PETRI_PLACES=422, PETRI_TRANSITIONS=419} [2021-12-17 23:20:39,658 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 334 predicate places. [2021-12-17 23:20:39,658 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 419 transitions, 4388 flow [2021-12-17 23:20:39,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:39,658 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:39,658 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] [2021-12-17 23:20:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-17 23:20:39,659 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -788153972, now seen corresponding path program 58 times [2021-12-17 23:20:39,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409886505] [2021-12-17 23:20:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:39,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:39,988 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 23:20:39,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409886505] [2021-12-17 23:20:39,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409886505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:39,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:39,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:39,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292208025] [2021-12-17 23:20:39,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:39,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:39,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:39,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:39,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 419 transitions, 4388 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:39,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:39,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:39,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:42,660 INFO L129 PetriNetUnfolder]: 371/1087 cut-off events. [2021-12-17 23:20:42,660 INFO L130 PetriNetUnfolder]: For 13317/13317 co-relation queries the response was YES. [2021-12-17 23:20:42,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7210 conditions, 1087 events. 371/1087 cut-off events. For 13317/13317 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6424 event pairs, 43 based on Foata normal form. 1/1086 useless extension candidates. Maximal degree in co-relation 7073. Up to 714 conditions per place. [2021-12-17 23:20:42,675 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 296 selfloop transitions, 109 changer transitions 29/473 dead transitions. [2021-12-17 23:20:42,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 473 transitions, 5957 flow [2021-12-17 23:20:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:20:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:20:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2066 transitions. [2021-12-17 23:20:42,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.563557010365521 [2021-12-17 23:20:42,677 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2066 transitions. [2021-12-17 23:20:42,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2066 transitions. [2021-12-17 23:20:42,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:42,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2066 transitions. [2021-12-17 23:20:42,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.97435897435897) internal successors, (2066), 39 states have internal predecessors, (2066), 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 23:20:42,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:42,680 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:20:42,680 INFO L186 Difference]: Start difference. First operand has 422 places, 419 transitions, 4388 flow. Second operand 39 states and 2066 transitions. [2021-12-17 23:20:42,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 473 transitions, 5957 flow [2021-12-17 23:20:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 473 transitions, 5644 flow, removed 34 selfloop flow, removed 38 redundant places. [2021-12-17 23:20:42,781 INFO L242 Difference]: Finished difference. Result has 419 places, 428 transitions, 4552 flow [2021-12-17 23:20:42,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4552, PETRI_PLACES=419, PETRI_TRANSITIONS=428} [2021-12-17 23:20:42,782 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 331 predicate places. [2021-12-17 23:20:42,782 INFO L470 AbstractCegarLoop]: Abstraction has has 419 places, 428 transitions, 4552 flow [2021-12-17 23:20:42,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:42,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:42,783 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] [2021-12-17 23:20:42,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-17 23:20:42,783 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 803211426, now seen corresponding path program 59 times [2021-12-17 23:20:42,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:42,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026632990] [2021-12-17 23:20:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:42,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:43,138 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 23:20:43,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026632990] [2021-12-17 23:20:43,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026632990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:43,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:43,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:43,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641272661] [2021-12-17 23:20:43,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:43,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:43,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:43,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:43,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:43,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:43,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 428 transitions, 4552 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:43,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:43,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:43,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:45,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:20:46,887 INFO L129 PetriNetUnfolder]: 406/1188 cut-off events. [2021-12-17 23:20:46,887 INFO L130 PetriNetUnfolder]: For 16744/16744 co-relation queries the response was YES. [2021-12-17 23:20:46,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8043 conditions, 1188 events. 406/1188 cut-off events. For 16744/16744 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7195 event pairs, 48 based on Foata normal form. 1/1187 useless extension candidates. Maximal degree in co-relation 7909. Up to 699 conditions per place. [2021-12-17 23:20:46,900 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 267 selfloop transitions, 202 changer transitions 23/531 dead transitions. [2021-12-17 23:20:46,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 531 transitions, 7161 flow [2021-12-17 23:20:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 23:20:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-17 23:20:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2475 transitions. [2021-12-17 23:20:46,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.560208239022182 [2021-12-17 23:20:46,901 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2475 transitions. [2021-12-17 23:20:46,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2475 transitions. [2021-12-17 23:20:46,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:46,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2475 transitions. [2021-12-17 23:20:46,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.659574468085104) internal successors, (2475), 47 states have internal predecessors, (2475), 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 23:20:46,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:20:46,906 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:20:46,906 INFO L186 Difference]: Start difference. First operand has 419 places, 428 transitions, 4552 flow. Second operand 47 states and 2475 transitions. [2021-12-17 23:20:46,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 531 transitions, 7161 flow [2021-12-17 23:20:46,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 531 transitions, 6818 flow, removed 108 selfloop flow, removed 33 redundant places. [2021-12-17 23:20:47,000 INFO L242 Difference]: Finished difference. Result has 438 places, 482 transitions, 5852 flow [2021-12-17 23:20:47,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5852, PETRI_PLACES=438, PETRI_TRANSITIONS=482} [2021-12-17 23:20:47,000 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 350 predicate places. [2021-12-17 23:20:47,001 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 482 transitions, 5852 flow [2021-12-17 23:20:47,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:47,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:47,001 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] [2021-12-17 23:20:47,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 23:20:47,001 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash 406258926, now seen corresponding path program 60 times [2021-12-17 23:20:47,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593143230] [2021-12-17 23:20:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:47,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:47,390 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 23:20:47,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593143230] [2021-12-17 23:20:47,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593143230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:47,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:47,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:47,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89843090] [2021-12-17 23:20:47,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:47,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:47,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:47,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:47,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 482 transitions, 5852 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:47,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:47,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:47,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:48,886 INFO L129 PetriNetUnfolder]: 409/1202 cut-off events. [2021-12-17 23:20:48,887 INFO L130 PetriNetUnfolder]: For 19240/19240 co-relation queries the response was YES. [2021-12-17 23:20:48,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8648 conditions, 1202 events. 409/1202 cut-off events. For 19240/19240 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7367 event pairs, 51 based on Foata normal form. 1/1201 useless extension candidates. Maximal degree in co-relation 8507. Up to 787 conditions per place. [2021-12-17 23:20:48,902 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 332 selfloop transitions, 125 changer transitions 36/532 dead transitions. [2021-12-17 23:20:48,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 532 transitions, 7551 flow [2021-12-17 23:20:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:20:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-17 23:20:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2316 transitions. [2021-12-17 23:20:48,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5599613152804642 [2021-12-17 23:20:48,904 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2316 transitions. [2021-12-17 23:20:48,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2316 transitions. [2021-12-17 23:20:48,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:48,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2316 transitions. [2021-12-17 23:20:48,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.63636363636363) internal successors, (2316), 44 states have internal predecessors, (2316), 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 23:20:48,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:20:48,909 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:20:48,909 INFO L186 Difference]: Start difference. First operand has 438 places, 482 transitions, 5852 flow. Second operand 44 states and 2316 transitions. [2021-12-17 23:20:48,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 532 transitions, 7551 flow [2021-12-17 23:20:49,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 532 transitions, 6982 flow, removed 219 selfloop flow, removed 28 redundant places. [2021-12-17 23:20:49,050 INFO L242 Difference]: Finished difference. Result has 461 places, 483 transitions, 5747 flow [2021-12-17 23:20:49,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5747, PETRI_PLACES=461, PETRI_TRANSITIONS=483} [2021-12-17 23:20:49,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 373 predicate places. [2021-12-17 23:20:49,052 INFO L470 AbstractCegarLoop]: Abstraction has has 461 places, 483 transitions, 5747 flow [2021-12-17 23:20:49,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:49,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:49,052 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] [2021-12-17 23:20:49,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 23:20:49,052 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1351610720, now seen corresponding path program 61 times [2021-12-17 23:20:49,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873924888] [2021-12-17 23:20:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:49,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:49,420 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 23:20:49,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:49,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873924888] [2021-12-17 23:20:49,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873924888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:49,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:49,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:49,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595640918] [2021-12-17 23:20:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:49,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:49,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:49,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:49,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 483 transitions, 5747 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:49,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:49,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:49,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:50,609 INFO L129 PetriNetUnfolder]: 405/1182 cut-off events. [2021-12-17 23:20:50,609 INFO L130 PetriNetUnfolder]: For 18655/18655 co-relation queries the response was YES. [2021-12-17 23:20:50,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8556 conditions, 1182 events. 405/1182 cut-off events. For 18655/18655 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7172 event pairs, 57 based on Foata normal form. 1/1180 useless extension candidates. Maximal degree in co-relation 8405. Up to 835 conditions per place. [2021-12-17 23:20:50,626 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 369 selfloop transitions, 84 changer transitions 31/523 dead transitions. [2021-12-17 23:20:50,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 523 transitions, 7272 flow [2021-12-17 23:20:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1804 transitions. [2021-12-17 23:20:50,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644555694618273 [2021-12-17 23:20:50,628 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1804 transitions. [2021-12-17 23:20:50,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1804 transitions. [2021-12-17 23:20:50,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:50,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1804 transitions. [2021-12-17 23:20:50,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.05882352941177) internal successors, (1804), 34 states have internal predecessors, (1804), 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 23:20:50,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:50,634 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:50,634 INFO L186 Difference]: Start difference. First operand has 461 places, 483 transitions, 5747 flow. Second operand 34 states and 1804 transitions. [2021-12-17 23:20:50,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 523 transitions, 7272 flow [2021-12-17 23:20:50,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 523 transitions, 6853 flow, removed 72 selfloop flow, removed 42 redundant places. [2021-12-17 23:20:50,858 INFO L242 Difference]: Finished difference. Result has 451 places, 481 transitions, 5610 flow [2021-12-17 23:20:50,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5610, PETRI_PLACES=451, PETRI_TRANSITIONS=481} [2021-12-17 23:20:50,859 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 363 predicate places. [2021-12-17 23:20:50,859 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 481 transitions, 5610 flow [2021-12-17 23:20:50,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:50,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:50,860 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] [2021-12-17 23:20:50,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 23:20:50,860 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash 7749890, now seen corresponding path program 62 times [2021-12-17 23:20:50,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:50,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100130635] [2021-12-17 23:20:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:50,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:51,204 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 23:20:51,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100130635] [2021-12-17 23:20:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100130635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:51,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:51,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:51,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006157067] [2021-12-17 23:20:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:51,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:51,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:51,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:51,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 481 transitions, 5610 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:51,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:51,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:51,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:52,753 INFO L129 PetriNetUnfolder]: 407/1209 cut-off events. [2021-12-17 23:20:52,753 INFO L130 PetriNetUnfolder]: For 18136/18136 co-relation queries the response was YES. [2021-12-17 23:20:52,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8534 conditions, 1209 events. 407/1209 cut-off events. For 18136/18136 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7445 event pairs, 47 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 8385. Up to 785 conditions per place. [2021-12-17 23:20:52,769 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 330 selfloop transitions, 139 changer transitions 27/535 dead transitions. [2021-12-17 23:20:52,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 535 transitions, 7404 flow [2021-12-17 23:20:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:20:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:20:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2163 transitions. [2021-12-17 23:20:52,771 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612350804359107 [2021-12-17 23:20:52,771 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2163 transitions. [2021-12-17 23:20:52,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2163 transitions. [2021-12-17 23:20:52,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:52,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2163 transitions. [2021-12-17 23:20:52,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.75609756097561) internal successors, (2163), 41 states have internal predecessors, (2163), 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 23:20:52,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:20:52,775 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:20:52,775 INFO L186 Difference]: Start difference. First operand has 451 places, 481 transitions, 5610 flow. Second operand 41 states and 2163 transitions. [2021-12-17 23:20:52,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 535 transitions, 7404 flow [2021-12-17 23:20:52,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 535 transitions, 7144 flow, removed 60 selfloop flow, removed 32 redundant places. [2021-12-17 23:20:52,903 INFO L242 Difference]: Finished difference. Result has 459 places, 492 transitions, 5987 flow [2021-12-17 23:20:52,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5394, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5987, PETRI_PLACES=459, PETRI_TRANSITIONS=492} [2021-12-17 23:20:52,903 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-12-17 23:20:52,903 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 492 transitions, 5987 flow [2021-12-17 23:20:52,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:52,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:52,904 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] [2021-12-17 23:20:52,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-17 23:20:52,904 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -588333202, now seen corresponding path program 63 times [2021-12-17 23:20:52,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237035917] [2021-12-17 23:20:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:52,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:53,201 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 23:20:53,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237035917] [2021-12-17 23:20:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237035917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:53,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:53,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:20:53,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494870235] [2021-12-17 23:20:53,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:20:53,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:20:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:20:53,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:53,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 492 transitions, 5987 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:53,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:53,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:53,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:55,056 INFO L129 PetriNetUnfolder]: 408/1222 cut-off events. [2021-12-17 23:20:55,056 INFO L130 PetriNetUnfolder]: For 19108/19108 co-relation queries the response was YES. [2021-12-17 23:20:55,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8751 conditions, 1222 events. 408/1222 cut-off events. For 19108/19108 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7547 event pairs, 49 based on Foata normal form. 1/1221 useless extension candidates. Maximal degree in co-relation 8601. Up to 783 conditions per place. [2021-12-17 23:20:55,075 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 324 selfloop transitions, 148 changer transitions 27/538 dead transitions. [2021-12-17 23:20:55,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 538 transitions, 7661 flow [2021-12-17 23:20:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 23:20:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-17 23:20:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2263 transitions. [2021-12-17 23:20:55,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5598713508164275 [2021-12-17 23:20:55,077 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2263 transitions. [2021-12-17 23:20:55,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2263 transitions. [2021-12-17 23:20:55,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:55,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2263 transitions. [2021-12-17 23:20:55,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.627906976744185) internal successors, (2263), 43 states have internal predecessors, (2263), 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 23:20:55,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:20:55,081 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:20:55,081 INFO L186 Difference]: Start difference. First operand has 459 places, 492 transitions, 5987 flow. Second operand 43 states and 2263 transitions. [2021-12-17 23:20:55,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 538 transitions, 7661 flow [2021-12-17 23:20:55,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 538 transitions, 7378 flow, removed 60 selfloop flow, removed 34 redundant places. [2021-12-17 23:20:55,219 INFO L242 Difference]: Finished difference. Result has 470 places, 495 transitions, 6203 flow [2021-12-17 23:20:55,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=6203, PETRI_PLACES=470, PETRI_TRANSITIONS=495} [2021-12-17 23:20:55,220 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 382 predicate places. [2021-12-17 23:20:55,220 INFO L470 AbstractCegarLoop]: Abstraction has has 470 places, 495 transitions, 6203 flow [2021-12-17 23:20:55,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:20:55,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:55,221 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] [2021-12-17 23:20:55,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-17 23:20:55,221 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1090941452, now seen corresponding path program 64 times [2021-12-17 23:20:55,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:55,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960913947] [2021-12-17 23:20:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:55,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:55,538 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 23:20:55,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960913947] [2021-12-17 23:20:55,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960913947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:55,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:55,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:55,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754527694] [2021-12-17 23:20:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:55,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:55,541 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:55,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 495 transitions, 6203 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:55,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:55,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:55,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:56,890 INFO L129 PetriNetUnfolder]: 414/1235 cut-off events. [2021-12-17 23:20:56,890 INFO L130 PetriNetUnfolder]: For 20412/20412 co-relation queries the response was YES. [2021-12-17 23:20:56,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9053 conditions, 1235 events. 414/1235 cut-off events. For 20412/20412 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7715 event pairs, 41 based on Foata normal form. 1/1234 useless extension candidates. Maximal degree in co-relation 8899. Up to 852 conditions per place. [2021-12-17 23:20:56,908 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 386 selfloop transitions, 88 changer transitions 31/544 dead transitions. [2021-12-17 23:20:56,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 544 transitions, 7911 flow [2021-12-17 23:20:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1803 transitions. [2021-12-17 23:20:56,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564142678347935 [2021-12-17 23:20:56,910 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1803 transitions. [2021-12-17 23:20:56,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1803 transitions. [2021-12-17 23:20:56,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:56,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1803 transitions. [2021-12-17 23:20:56,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.029411764705884) internal successors, (1803), 34 states have internal predecessors, (1803), 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 23:20:56,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:56,913 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:56,913 INFO L186 Difference]: Start difference. First operand has 470 places, 495 transitions, 6203 flow. Second operand 34 states and 1803 transitions. [2021-12-17 23:20:56,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 544 transitions, 7911 flow [2021-12-17 23:20:57,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 544 transitions, 7605 flow, removed 52 selfloop flow, removed 39 redundant places. [2021-12-17 23:20:57,121 INFO L242 Difference]: Finished difference. Result has 471 places, 502 transitions, 6329 flow [2021-12-17 23:20:57,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6329, PETRI_PLACES=471, PETRI_TRANSITIONS=502} [2021-12-17 23:20:57,121 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-12-17 23:20:57,122 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 502 transitions, 6329 flow [2021-12-17 23:20:57,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:57,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:57,122 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] [2021-12-17 23:20:57,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-17 23:20:57,122 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash 358106596, now seen corresponding path program 65 times [2021-12-17 23:20:57,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363745384] [2021-12-17 23:20:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:57,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:57,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363745384] [2021-12-17 23:20:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363745384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:57,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:57,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:57,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267964111] [2021-12-17 23:20:57,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:57,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:57,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:57,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:57,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 502 transitions, 6329 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:57,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:57,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:57,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:58,680 INFO L129 PetriNetUnfolder]: 404/1215 cut-off events. [2021-12-17 23:20:58,680 INFO L130 PetriNetUnfolder]: For 19794/19794 co-relation queries the response was YES. [2021-12-17 23:20:58,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8913 conditions, 1215 events. 404/1215 cut-off events. For 19794/19794 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7547 event pairs, 48 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 8753. Up to 802 conditions per place. [2021-12-17 23:20:58,696 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 364 selfloop transitions, 124 changer transitions 19/546 dead transitions. [2021-12-17 23:20:58,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 546 transitions, 7952 flow [2021-12-17 23:20:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:20:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:20:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1808 transitions. [2021-12-17 23:20:58,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657071339173968 [2021-12-17 23:20:58,698 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1808 transitions. [2021-12-17 23:20:58,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1808 transitions. [2021-12-17 23:20:58,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:58,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1808 transitions. [2021-12-17 23:20:58,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.1764705882353) internal successors, (1808), 34 states have internal predecessors, (1808), 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 23:20:58,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:58,701 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:20:58,701 INFO L186 Difference]: Start difference. First operand has 471 places, 502 transitions, 6329 flow. Second operand 34 states and 1808 transitions. [2021-12-17 23:20:58,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 546 transitions, 7952 flow [2021-12-17 23:20:58,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 546 transitions, 7714 flow, removed 50 selfloop flow, removed 29 redundant places. [2021-12-17 23:20:58,823 INFO L242 Difference]: Finished difference. Result has 474 places, 508 transitions, 6555 flow [2021-12-17 23:20:58,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6555, PETRI_PLACES=474, PETRI_TRANSITIONS=508} [2021-12-17 23:20:58,824 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 386 predicate places. [2021-12-17 23:20:58,824 INFO L470 AbstractCegarLoop]: Abstraction has has 474 places, 508 transitions, 6555 flow [2021-12-17 23:20:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:58,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:58,824 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] [2021-12-17 23:20:58,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-17 23:20:58,824 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 593158140, now seen corresponding path program 66 times [2021-12-17 23:20:58,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437222662] [2021-12-17 23:20:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:58,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:59,162 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 23:20:59,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437222662] [2021-12-17 23:20:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437222662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:20:59,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:20:59,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:20:59,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462033153] [2021-12-17 23:20:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:20:59,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:20:59,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:20:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:20:59,164 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:20:59,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 508 transitions, 6555 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:20:59,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:59,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:20:59,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:00,365 INFO L129 PetriNetUnfolder]: 413/1234 cut-off events. [2021-12-17 23:21:00,366 INFO L130 PetriNetUnfolder]: For 21295/21295 co-relation queries the response was YES. [2021-12-17 23:21:00,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9248 conditions, 1234 events. 413/1234 cut-off events. For 21295/21295 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7721 event pairs, 49 based on Foata normal form. 1/1233 useless extension candidates. Maximal degree in co-relation 9090. Up to 832 conditions per place. [2021-12-17 23:21:00,383 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 376 selfloop transitions, 107 changer transitions 27/549 dead transitions. [2021-12-17 23:21:00,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 549 transitions, 8215 flow [2021-12-17 23:21:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:21:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:21:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-17 23:21:00,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-17 23:21:00,384 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-17 23:21:00,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-17 23:21:00,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:00,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-17 23:21:00,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 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 23:21:00,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:21:00,388 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:21:00,388 INFO L186 Difference]: Start difference. First operand has 474 places, 508 transitions, 6555 flow. Second operand 33 states and 1758 transitions. [2021-12-17 23:21:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 549 transitions, 8215 flow [2021-12-17 23:21:00,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 549 transitions, 7925 flow, removed 74 selfloop flow, removed 27 redundant places. [2021-12-17 23:21:00,515 INFO L242 Difference]: Finished difference. Result has 484 places, 511 transitions, 6663 flow [2021-12-17 23:21:00,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6663, PETRI_PLACES=484, PETRI_TRANSITIONS=511} [2021-12-17 23:21:00,516 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 396 predicate places. [2021-12-17 23:21:00,516 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 511 transitions, 6663 flow [2021-12-17 23:21:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:00,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:00,517 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] [2021-12-17 23:21:00,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-17 23:21:00,517 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -582302578, now seen corresponding path program 67 times [2021-12-17 23:21:00,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:00,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021089365] [2021-12-17 23:21:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:00,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:00,816 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 23:21:00,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021089365] [2021-12-17 23:21:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021089365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:00,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:00,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263265407] [2021-12-17 23:21:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:00,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:00,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:00,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 511 transitions, 6663 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:00,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:00,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:00,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:02,078 INFO L129 PetriNetUnfolder]: 414/1248 cut-off events. [2021-12-17 23:21:02,078 INFO L130 PetriNetUnfolder]: For 22331/22331 co-relation queries the response was YES. [2021-12-17 23:21:02,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 1248 events. 414/1248 cut-off events. For 22331/22331 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7857 event pairs, 41 based on Foata normal form. 1/1247 useless extension candidates. Maximal degree in co-relation 9207. Up to 849 conditions per place. [2021-12-17 23:21:02,097 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 384 selfloop transitions, 97 changer transitions 31/551 dead transitions. [2021-12-17 23:21:02,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 551 transitions, 8344 flow [2021-12-17 23:21:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:21:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:21:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1854 transitions. [2021-12-17 23:21:02,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635258358662614 [2021-12-17 23:21:02,099 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1854 transitions. [2021-12-17 23:21:02,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1854 transitions. [2021-12-17 23:21:02,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:02,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1854 transitions. [2021-12-17 23:21:02,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.97142857142857) internal successors, (1854), 35 states have internal predecessors, (1854), 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 23:21:02,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:21:02,102 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:21:02,102 INFO L186 Difference]: Start difference. First operand has 484 places, 511 transitions, 6663 flow. Second operand 35 states and 1854 transitions. [2021-12-17 23:21:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 551 transitions, 8344 flow [2021-12-17 23:21:02,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 551 transitions, 8045 flow, removed 70 selfloop flow, removed 29 redundant places. [2021-12-17 23:21:02,268 INFO L242 Difference]: Finished difference. Result has 492 places, 509 transitions, 6715 flow [2021-12-17 23:21:02,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6715, PETRI_PLACES=492, PETRI_TRANSITIONS=509} [2021-12-17 23:21:02,269 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 404 predicate places. [2021-12-17 23:21:02,269 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 509 transitions, 6715 flow [2021-12-17 23:21:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:02,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:02,270 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] [2021-12-17 23:21:02,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-17 23:21:02,270 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash -898099020, now seen corresponding path program 68 times [2021-12-17 23:21:02,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:02,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79287520] [2021-12-17 23:21:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:02,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:02,656 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 23:21:02,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79287520] [2021-12-17 23:21:02,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79287520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:02,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:02,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:02,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527290133] [2021-12-17 23:21:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:02,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:02,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:02,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:02,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 509 transitions, 6715 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:02,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:02,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:02,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:04,143 INFO L129 PetriNetUnfolder]: 411/1235 cut-off events. [2021-12-17 23:21:04,144 INFO L130 PetriNetUnfolder]: For 21209/21209 co-relation queries the response was YES. [2021-12-17 23:21:04,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9312 conditions, 1235 events. 411/1235 cut-off events. For 21209/21209 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7692 event pairs, 57 based on Foata normal form. 1/1234 useless extension candidates. Maximal degree in co-relation 9146. Up to 857 conditions per place. [2021-12-17 23:21:04,164 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 394 selfloop transitions, 94 changer transitions 22/549 dead transitions. [2021-12-17 23:21:04,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 549 transitions, 8283 flow [2021-12-17 23:21:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1900 transitions. [2021-12-17 23:21:04,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5614657210401891 [2021-12-17 23:21:04,166 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1900 transitions. [2021-12-17 23:21:04,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1900 transitions. [2021-12-17 23:21:04,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:04,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1900 transitions. [2021-12-17 23:21:04,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.77777777777778) internal successors, (1900), 36 states have internal predecessors, (1900), 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 23:21:04,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:04,169 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:04,169 INFO L186 Difference]: Start difference. First operand has 492 places, 509 transitions, 6715 flow. Second operand 36 states and 1900 transitions. [2021-12-17 23:21:04,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 549 transitions, 8283 flow [2021-12-17 23:21:04,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 549 transitions, 7984 flow, removed 65 selfloop flow, removed 32 redundant places. [2021-12-17 23:21:04,350 INFO L242 Difference]: Finished difference. Result has 496 places, 515 transitions, 6814 flow [2021-12-17 23:21:04,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6814, PETRI_PLACES=496, PETRI_TRANSITIONS=515} [2021-12-17 23:21:04,351 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 408 predicate places. [2021-12-17 23:21:04,351 INFO L470 AbstractCegarLoop]: Abstraction has has 496 places, 515 transitions, 6814 flow [2021-12-17 23:21:04,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:04,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:04,352 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] [2021-12-17 23:21:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-17 23:21:04,352 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1050381286, now seen corresponding path program 69 times [2021-12-17 23:21:04,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:04,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364948706] [2021-12-17 23:21:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:04,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:04,700 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 23:21:04,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:04,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364948706] [2021-12-17 23:21:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364948706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:04,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:04,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:04,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518712983] [2021-12-17 23:21:04,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:04,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:04,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:04,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 515 transitions, 6814 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:04,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:04,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:04,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:06,128 INFO L129 PetriNetUnfolder]: 420/1251 cut-off events. [2021-12-17 23:21:06,129 INFO L130 PetriNetUnfolder]: For 22333/22333 co-relation queries the response was YES. [2021-12-17 23:21:06,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 1251 events. 420/1251 cut-off events. For 22333/22333 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7854 event pairs, 40 based on Foata normal form. 1/1249 useless extension candidates. Maximal degree in co-relation 9432. Up to 854 conditions per place. [2021-12-17 23:21:06,146 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 389 selfloop transitions, 119 changer transitions 26/573 dead transitions. [2021-12-17 23:21:06,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 573 transitions, 8726 flow [2021-12-17 23:21:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:21:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:21:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2011 transitions. [2021-12-17 23:21:06,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.562989921612542 [2021-12-17 23:21:06,148 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2011 transitions. [2021-12-17 23:21:06,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2011 transitions. [2021-12-17 23:21:06,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:06,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2011 transitions. [2021-12-17 23:21:06,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.921052631578945) internal successors, (2011), 38 states have internal predecessors, (2011), 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 23:21:06,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:21:06,151 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:21:06,151 INFO L186 Difference]: Start difference. First operand has 496 places, 515 transitions, 6814 flow. Second operand 38 states and 2011 transitions. [2021-12-17 23:21:06,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 573 transitions, 8726 flow [2021-12-17 23:21:06,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 573 transitions, 8456 flow, removed 71 selfloop flow, removed 30 redundant places. [2021-12-17 23:21:06,314 INFO L242 Difference]: Finished difference. Result has 508 places, 532 transitions, 7227 flow [2021-12-17 23:21:06,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7227, PETRI_PLACES=508, PETRI_TRANSITIONS=532} [2021-12-17 23:21:06,314 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 420 predicate places. [2021-12-17 23:21:06,315 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 532 transitions, 7227 flow [2021-12-17 23:21:06,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:06,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:06,315 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] [2021-12-17 23:21:06,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-17 23:21:06,315 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1444025338, now seen corresponding path program 70 times [2021-12-17 23:21:06,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:06,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99742619] [2021-12-17 23:21:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:06,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:06,629 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 23:21:06,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99742619] [2021-12-17 23:21:06,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99742619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:06,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:06,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:06,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233524002] [2021-12-17 23:21:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:06,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:06,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:06,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:06,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 532 transitions, 7227 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:06,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:06,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:06,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:07,924 INFO L129 PetriNetUnfolder]: 410/1248 cut-off events. [2021-12-17 23:21:07,924 INFO L130 PetriNetUnfolder]: For 22034/22034 co-relation queries the response was YES. [2021-12-17 23:21:07,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9492 conditions, 1248 events. 410/1248 cut-off events. For 22034/22034 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7917 event pairs, 43 based on Foata normal form. 1/1247 useless extension candidates. Maximal degree in co-relation 9318. Up to 880 conditions per place. [2021-12-17 23:21:07,943 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 412 selfloop transitions, 88 changer transitions 19/558 dead transitions. [2021-12-17 23:21:07,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 558 transitions, 8462 flow [2021-12-17 23:21:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:21:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:21:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1791 transitions. [2021-12-17 23:21:07,945 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603879849812266 [2021-12-17 23:21:07,945 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1791 transitions. [2021-12-17 23:21:07,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1791 transitions. [2021-12-17 23:21:07,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:07,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1791 transitions. [2021-12-17 23:21:07,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.6764705882353) internal successors, (1791), 34 states have internal predecessors, (1791), 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 23:21:07,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:07,948 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:07,948 INFO L186 Difference]: Start difference. First operand has 508 places, 532 transitions, 7227 flow. Second operand 34 states and 1791 transitions. [2021-12-17 23:21:07,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 558 transitions, 8462 flow [2021-12-17 23:21:08,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 558 transitions, 8202 flow, removed 44 selfloop flow, removed 31 redundant places. [2021-12-17 23:21:08,124 INFO L242 Difference]: Finished difference. Result has 511 places, 529 transitions, 7135 flow [2021-12-17 23:21:08,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6979, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7135, PETRI_PLACES=511, PETRI_TRANSITIONS=529} [2021-12-17 23:21:08,124 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 423 predicate places. [2021-12-17 23:21:08,125 INFO L470 AbstractCegarLoop]: Abstraction has has 511 places, 529 transitions, 7135 flow [2021-12-17 23:21:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:08,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:08,125 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] [2021-12-17 23:21:08,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-17 23:21:08,125 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -998249412, now seen corresponding path program 71 times [2021-12-17 23:21:08,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095081344] [2021-12-17 23:21:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:08,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:08,429 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 23:21:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095081344] [2021-12-17 23:21:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095081344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:08,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:08,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:08,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858373420] [2021-12-17 23:21:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:08,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:08,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:08,430 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:08,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 529 transitions, 7135 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:08,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:08,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:08,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:09,819 INFO L129 PetriNetUnfolder]: 419/1272 cut-off events. [2021-12-17 23:21:09,819 INFO L130 PetriNetUnfolder]: For 22177/22177 co-relation queries the response was YES. [2021-12-17 23:21:09,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 1272 events. 419/1272 cut-off events. For 22177/22177 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8069 event pairs, 53 based on Foata normal form. 1/1271 useless extension candidates. Maximal degree in co-relation 9566. Up to 862 conditions per place. [2021-12-17 23:21:09,840 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 403 selfloop transitions, 109 changer transitions 22/573 dead transitions. [2021-12-17 23:21:09,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 573 transitions, 8814 flow [2021-12-17 23:21:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-12-17 23:21:09,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-12-17 23:21:09,842 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-12-17 23:21:09,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-12-17 23:21:09,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:09,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-12-17 23:21:09,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 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 23:21:09,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:09,845 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:09,845 INFO L186 Difference]: Start difference. First operand has 511 places, 529 transitions, 7135 flow. Second operand 36 states and 1910 transitions. [2021-12-17 23:21:09,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 573 transitions, 8814 flow [2021-12-17 23:21:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 573 transitions, 8560 flow, removed 21 selfloop flow, removed 35 redundant places. [2021-12-17 23:21:10,019 INFO L242 Difference]: Finished difference. Result has 514 places, 539 transitions, 7358 flow [2021-12-17 23:21:10,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6905, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7358, PETRI_PLACES=514, PETRI_TRANSITIONS=539} [2021-12-17 23:21:10,020 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 426 predicate places. [2021-12-17 23:21:10,020 INFO L470 AbstractCegarLoop]: Abstraction has has 514 places, 539 transitions, 7358 flow [2021-12-17 23:21:10,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:10,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:10,021 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] [2021-12-17 23:21:10,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-17 23:21:10,021 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1713911112, now seen corresponding path program 72 times [2021-12-17 23:21:10,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:10,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217591453] [2021-12-17 23:21:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:10,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:10,344 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 23:21:10,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:10,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217591453] [2021-12-17 23:21:10,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217591453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:10,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:10,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:10,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015078511] [2021-12-17 23:21:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:10,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:10,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:10,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 539 transitions, 7358 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:10,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:10,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:10,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:13,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:21:13,725 INFO L129 PetriNetUnfolder]: 421/1294 cut-off events. [2021-12-17 23:21:13,725 INFO L130 PetriNetUnfolder]: For 24008/24008 co-relation queries the response was YES. [2021-12-17 23:21:13,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 1294 events. 421/1294 cut-off events. For 24008/24008 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8267 event pairs, 48 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 9822. Up to 907 conditions per place. [2021-12-17 23:21:13,748 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 428 selfloop transitions, 90 changer transitions 23/580 dead transitions. [2021-12-17 23:21:13,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 580 transitions, 9056 flow [2021-12-17 23:21:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1901 transitions. [2021-12-17 23:21:13,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5617612293144209 [2021-12-17 23:21:13,749 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1901 transitions. [2021-12-17 23:21:13,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1901 transitions. [2021-12-17 23:21:13,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:13,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1901 transitions. [2021-12-17 23:21:13,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.80555555555556) internal successors, (1901), 36 states have internal predecessors, (1901), 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 23:21:13,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:13,753 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:13,753 INFO L186 Difference]: Start difference. First operand has 514 places, 539 transitions, 7358 flow. Second operand 36 states and 1901 transitions. [2021-12-17 23:21:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 580 transitions, 9056 flow [2021-12-17 23:21:13,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 580 transitions, 8732 flow, removed 72 selfloop flow, removed 29 redundant places. [2021-12-17 23:21:13,947 INFO L242 Difference]: Finished difference. Result has 525 places, 545 transitions, 7439 flow [2021-12-17 23:21:13,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7064, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7439, PETRI_PLACES=525, PETRI_TRANSITIONS=545} [2021-12-17 23:21:13,947 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 437 predicate places. [2021-12-17 23:21:13,947 INFO L470 AbstractCegarLoop]: Abstraction has has 525 places, 545 transitions, 7439 flow [2021-12-17 23:21:13,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:13,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:13,948 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] [2021-12-17 23:21:13,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-12-17 23:21:13,948 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1920609492, now seen corresponding path program 73 times [2021-12-17 23:21:13,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:13,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328579269] [2021-12-17 23:21:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:13,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:14,324 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 23:21:14,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328579269] [2021-12-17 23:21:14,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328579269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:14,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:14,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:14,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309138889] [2021-12-17 23:21:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:14,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:14,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:14,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 545 transitions, 7439 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:14,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:14,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:14,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:15,762 INFO L129 PetriNetUnfolder]: 424/1304 cut-off events. [2021-12-17 23:21:15,762 INFO L130 PetriNetUnfolder]: For 26152/26152 co-relation queries the response was YES. [2021-12-17 23:21:15,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10134 conditions, 1304 events. 424/1304 cut-off events. For 26152/26152 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8433 event pairs, 42 based on Foata normal form. 1/1303 useless extension candidates. Maximal degree in co-relation 9951. Up to 875 conditions per place. [2021-12-17 23:21:15,783 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 407 selfloop transitions, 113 changer transitions 29/588 dead transitions. [2021-12-17 23:21:15,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 588 transitions, 9181 flow [2021-12-17 23:21:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:21:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:21:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2012 transitions. [2021-12-17 23:21:15,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632698768197089 [2021-12-17 23:21:15,785 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2012 transitions. [2021-12-17 23:21:15,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2012 transitions. [2021-12-17 23:21:15,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:15,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2012 transitions. [2021-12-17 23:21:15,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.94736842105263) internal successors, (2012), 38 states have internal predecessors, (2012), 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 23:21:15,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:21:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:21:15,788 INFO L186 Difference]: Start difference. First operand has 525 places, 545 transitions, 7439 flow. Second operand 38 states and 2012 transitions. [2021-12-17 23:21:15,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 588 transitions, 9181 flow [2021-12-17 23:21:15,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 588 transitions, 8911 flow, removed 69 selfloop flow, removed 30 redundant places. [2021-12-17 23:21:15,985 INFO L242 Difference]: Finished difference. Result has 536 places, 547 transitions, 7591 flow [2021-12-17 23:21:15,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7591, PETRI_PLACES=536, PETRI_TRANSITIONS=547} [2021-12-17 23:21:15,986 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 448 predicate places. [2021-12-17 23:21:15,986 INFO L470 AbstractCegarLoop]: Abstraction has has 536 places, 547 transitions, 7591 flow [2021-12-17 23:21:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:15,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:15,987 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] [2021-12-17 23:21:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-12-17 23:21:15,987 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2113644202, now seen corresponding path program 74 times [2021-12-17 23:21:15,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515549644] [2021-12-17 23:21:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:15,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:16,280 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 23:21:16,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515549644] [2021-12-17 23:21:16,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515549644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:16,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:16,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:16,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287346878] [2021-12-17 23:21:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:16,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:16,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:16,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 547 transitions, 7591 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:16,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:16,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:16,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:17,608 INFO L129 PetriNetUnfolder]: 427/1320 cut-off events. [2021-12-17 23:21:17,609 INFO L130 PetriNetUnfolder]: For 27399/27399 co-relation queries the response was YES. [2021-12-17 23:21:17,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 1320 events. 427/1320 cut-off events. For 27399/27399 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8551 event pairs, 48 based on Foata normal form. 1/1319 useless extension candidates. Maximal degree in co-relation 10235. Up to 858 conditions per place. [2021-12-17 23:21:17,632 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 397 selfloop transitions, 137 changer transitions 21/594 dead transitions. [2021-12-17 23:21:17,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 594 transitions, 9609 flow [2021-12-17 23:21:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:21:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:21:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1969 transitions. [2021-12-17 23:21:17,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566129959746981 [2021-12-17 23:21:17,634 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1969 transitions. [2021-12-17 23:21:17,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1969 transitions. [2021-12-17 23:21:17,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:17,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1969 transitions. [2021-12-17 23:21:17,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.21621621621622) internal successors, (1969), 37 states have internal predecessors, (1969), 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 23:21:17,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:21:17,637 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:21:17,637 INFO L186 Difference]: Start difference. First operand has 536 places, 547 transitions, 7591 flow. Second operand 37 states and 1969 transitions. [2021-12-17 23:21:17,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 594 transitions, 9609 flow [2021-12-17 23:21:17,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 594 transitions, 9198 flow, removed 82 selfloop flow, removed 33 redundant places. [2021-12-17 23:21:17,818 INFO L242 Difference]: Finished difference. Result has 539 places, 558 transitions, 7879 flow [2021-12-17 23:21:17,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7231, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7879, PETRI_PLACES=539, PETRI_TRANSITIONS=558} [2021-12-17 23:21:17,819 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 451 predicate places. [2021-12-17 23:21:17,819 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 558 transitions, 7879 flow [2021-12-17 23:21:17,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:17,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:17,820 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] [2021-12-17 23:21:17,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-12-17 23:21:17,820 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash -80926160, now seen corresponding path program 75 times [2021-12-17 23:21:17,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:17,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319892636] [2021-12-17 23:21:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:17,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:18,161 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 23:21:18,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319892636] [2021-12-17 23:21:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319892636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:18,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:18,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:21:18,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055192942] [2021-12-17 23:21:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:21:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:21:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:21:18,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:18,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 558 transitions, 7879 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:18,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:18,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:18,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:20,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:21:21,783 INFO L129 PetriNetUnfolder]: 466/1450 cut-off events. [2021-12-17 23:21:21,783 INFO L130 PetriNetUnfolder]: For 31149/31149 co-relation queries the response was YES. [2021-12-17 23:21:21,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11506 conditions, 1450 events. 466/1450 cut-off events. For 31149/31149 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9790 event pairs, 41 based on Foata normal form. 1/1449 useless extension candidates. Maximal degree in co-relation 11317. Up to 901 conditions per place. [2021-12-17 23:21:21,809 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 189 changer transitions 24/674 dead transitions. [2021-12-17 23:21:21,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 674 transitions, 11018 flow [2021-12-17 23:21:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 23:21:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-17 23:21:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2275 transitions. [2021-12-17 23:21:21,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5628401781296388 [2021-12-17 23:21:21,811 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2275 transitions. [2021-12-17 23:21:21,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2275 transitions. [2021-12-17 23:21:21,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:21,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2275 transitions. [2021-12-17 23:21:21,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.906976744186046) internal successors, (2275), 43 states have internal predecessors, (2275), 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 23:21:21,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:21:21,814 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:21:21,814 INFO L186 Difference]: Start difference. First operand has 539 places, 558 transitions, 7879 flow. Second operand 43 states and 2275 transitions. [2021-12-17 23:21:21,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 674 transitions, 11018 flow [2021-12-17 23:21:22,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 674 transitions, 10594 flow, removed 132 selfloop flow, removed 26 redundant places. [2021-12-17 23:21:22,096 INFO L242 Difference]: Finished difference. Result has 561 places, 623 transitions, 9182 flow [2021-12-17 23:21:22,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7486, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=9182, PETRI_PLACES=561, PETRI_TRANSITIONS=623} [2021-12-17 23:21:22,096 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 473 predicate places. [2021-12-17 23:21:22,097 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 623 transitions, 9182 flow [2021-12-17 23:21:22,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:22,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:22,097 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] [2021-12-17 23:21:22,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-12-17 23:21:22,097 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1652636348, now seen corresponding path program 76 times [2021-12-17 23:21:22,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:22,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754926005] [2021-12-17 23:21:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:22,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:22,372 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 23:21:22,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754926005] [2021-12-17 23:21:22,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754926005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:22,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:22,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:22,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046083478] [2021-12-17 23:21:22,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:22,374 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:22,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 623 transitions, 9182 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:22,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:22,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:22,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:23,775 INFO L129 PetriNetUnfolder]: 457/1444 cut-off events. [2021-12-17 23:21:23,775 INFO L130 PetriNetUnfolder]: For 32174/32174 co-relation queries the response was YES. [2021-12-17 23:21:23,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 1444 events. 457/1444 cut-off events. For 32174/32174 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9824 event pairs, 54 based on Foata normal form. 1/1443 useless extension candidates. Maximal degree in co-relation 11462. Up to 964 conditions per place. [2021-12-17 23:21:23,797 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 463 selfloop transitions, 123 changer transitions 27/652 dead transitions. [2021-12-17 23:21:23,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 652 transitions, 10751 flow [2021-12-17 23:21:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:21:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:21:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2021-12-17 23:21:23,798 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2021-12-17 23:21:23,798 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2021-12-17 23:21:23,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2021-12-17 23:21:23,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:23,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2021-12-17 23:21:23,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 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 23:21:23,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:23,801 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:23,801 INFO L186 Difference]: Start difference. First operand has 561 places, 623 transitions, 9182 flow. Second operand 34 states and 1810 transitions. [2021-12-17 23:21:23,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 652 transitions, 10751 flow [2021-12-17 23:21:24,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 652 transitions, 10240 flow, removed 174 selfloop flow, removed 27 redundant places. [2021-12-17 23:21:24,035 INFO L242 Difference]: Finished difference. Result has 568 places, 615 transitions, 8917 flow [2021-12-17 23:21:24,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8675, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8917, PETRI_PLACES=568, PETRI_TRANSITIONS=615} [2021-12-17 23:21:24,035 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 480 predicate places. [2021-12-17 23:21:24,036 INFO L470 AbstractCegarLoop]: Abstraction has has 568 places, 615 transitions, 8917 flow [2021-12-17 23:21:24,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:24,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:24,036 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] [2021-12-17 23:21:24,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-12-17 23:21:24,036 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1552549722, now seen corresponding path program 77 times [2021-12-17 23:21:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009436882] [2021-12-17 23:21:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:24,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:24,439 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 23:21:24,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009436882] [2021-12-17 23:21:24,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009436882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:24,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:24,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:21:24,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546784939] [2021-12-17 23:21:24,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:24,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:21:24,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:21:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:21:24,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:24,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 615 transitions, 8917 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:21:24,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:24,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:24,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:26,454 INFO L129 PetriNetUnfolder]: 453/1440 cut-off events. [2021-12-17 23:21:26,454 INFO L130 PetriNetUnfolder]: For 31483/31483 co-relation queries the response was YES. [2021-12-17 23:21:26,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11614 conditions, 1440 events. 453/1440 cut-off events. For 31483/31483 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9790 event pairs, 51 based on Foata normal form. 1/1439 useless extension candidates. Maximal degree in co-relation 11412. Up to 918 conditions per place. [2021-12-17 23:21:26,481 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 451 selfloop transitions, 153 changer transitions 23/666 dead transitions. [2021-12-17 23:21:26,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 666 transitions, 10955 flow [2021-12-17 23:21:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 23:21:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-17 23:21:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2666 transitions. [2021-12-17 23:21:26,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5561118064246975 [2021-12-17 23:21:26,483 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2666 transitions. [2021-12-17 23:21:26,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2666 transitions. [2021-12-17 23:21:26,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:26,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2666 transitions. [2021-12-17 23:21:26,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 52.27450980392157) internal successors, (2666), 51 states have internal predecessors, (2666), 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 23:21:26,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 94.0) internal successors, (4888), 52 states have internal predecessors, (4888), 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 23:21:26,488 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 94.0) internal successors, (4888), 52 states have internal predecessors, (4888), 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 23:21:26,488 INFO L186 Difference]: Start difference. First operand has 568 places, 615 transitions, 8917 flow. Second operand 51 states and 2666 transitions. [2021-12-17 23:21:26,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 666 transitions, 10955 flow [2021-12-17 23:21:26,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 666 transitions, 10622 flow, removed 23 selfloop flow, removed 34 redundant places. [2021-12-17 23:21:26,711 INFO L242 Difference]: Finished difference. Result has 583 places, 623 transitions, 9221 flow [2021-12-17 23:21:26,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8610, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9221, PETRI_PLACES=583, PETRI_TRANSITIONS=623} [2021-12-17 23:21:26,711 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 495 predicate places. [2021-12-17 23:21:26,712 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 623 transitions, 9221 flow [2021-12-17 23:21:26,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:21:26,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:26,712 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] [2021-12-17 23:21:26,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-12-17 23:21:26,712 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1723562202, now seen corresponding path program 78 times [2021-12-17 23:21:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259258812] [2021-12-17 23:21:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:27,068 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 23:21:27,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259258812] [2021-12-17 23:21:27,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259258812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:27,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:27,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:27,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359715421] [2021-12-17 23:21:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:27,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:27,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:27,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:27,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 623 transitions, 9221 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:27,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:27,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:27,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:28,577 INFO L129 PetriNetUnfolder]: 448/1423 cut-off events. [2021-12-17 23:21:28,577 INFO L130 PetriNetUnfolder]: For 32092/32092 co-relation queries the response was YES. [2021-12-17 23:21:28,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11638 conditions, 1423 events. 448/1423 cut-off events. For 32092/32092 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9603 event pairs, 51 based on Foata normal form. 1/1422 useless extension candidates. Maximal degree in co-relation 11435. Up to 952 conditions per place. [2021-12-17 23:21:28,607 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 466 selfloop transitions, 130 changer transitions 23/658 dead transitions. [2021-12-17 23:21:28,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 658 transitions, 11059 flow [2021-12-17 23:21:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:21:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:21:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1707 transitions. [2021-12-17 23:21:28,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5674867021276596 [2021-12-17 23:21:28,609 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1707 transitions. [2021-12-17 23:21:28,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1707 transitions. [2021-12-17 23:21:28,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:28,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1707 transitions. [2021-12-17 23:21:28,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.34375) internal successors, (1707), 32 states have internal predecessors, (1707), 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 23:21:28,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:21:28,612 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:21:28,613 INFO L186 Difference]: Start difference. First operand has 583 places, 623 transitions, 9221 flow. Second operand 32 states and 1707 transitions. [2021-12-17 23:21:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 658 transitions, 11059 flow [2021-12-17 23:21:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 658 transitions, 10564 flow, removed 134 selfloop flow, removed 42 redundant places. [2021-12-17 23:21:28,850 INFO L242 Difference]: Finished difference. Result has 572 places, 625 transitions, 9228 flow [2021-12-17 23:21:28,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9228, PETRI_PLACES=572, PETRI_TRANSITIONS=625} [2021-12-17 23:21:28,851 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 484 predicate places. [2021-12-17 23:21:28,851 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 625 transitions, 9228 flow [2021-12-17 23:21:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:28,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:28,851 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] [2021-12-17 23:21:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-12-17 23:21:28,851 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2054597310, now seen corresponding path program 79 times [2021-12-17 23:21:28,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561691650] [2021-12-17 23:21:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:29,116 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 23:21:29,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:29,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561691650] [2021-12-17 23:21:29,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561691650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:29,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:29,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:29,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261404764] [2021-12-17 23:21:29,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:29,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:29,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 625 transitions, 9228 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:29,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:29,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:29,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:30,599 INFO L129 PetriNetUnfolder]: 445/1396 cut-off events. [2021-12-17 23:21:30,600 INFO L130 PetriNetUnfolder]: For 29857/29857 co-relation queries the response was YES. [2021-12-17 23:21:30,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 1396 events. 445/1396 cut-off events. For 29857/29857 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9311 event pairs, 52 based on Foata normal form. 1/1395 useless extension candidates. Maximal degree in co-relation 11193. Up to 1004 conditions per place. [2021-12-17 23:21:30,625 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 509 selfloop transitions, 84 changer transitions 19/651 dead transitions. [2021-12-17 23:21:30,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 651 transitions, 10652 flow [2021-12-17 23:21:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:21:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:21:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1792 transitions. [2021-12-17 23:21:30,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607008760951189 [2021-12-17 23:21:30,627 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1792 transitions. [2021-12-17 23:21:30,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1792 transitions. [2021-12-17 23:21:30,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:30,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1792 transitions. [2021-12-17 23:21:30,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.705882352941174) internal successors, (1792), 34 states have internal predecessors, (1792), 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 23:21:30,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:30,630 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:30,630 INFO L186 Difference]: Start difference. First operand has 572 places, 625 transitions, 9228 flow. Second operand 34 states and 1792 transitions. [2021-12-17 23:21:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 651 transitions, 10652 flow [2021-12-17 23:21:30,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 651 transitions, 10212 flow, removed 101 selfloop flow, removed 30 redundant places. [2021-12-17 23:21:30,869 INFO L242 Difference]: Finished difference. Result has 575 places, 622 transitions, 8952 flow [2021-12-17 23:21:30,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8952, PETRI_PLACES=575, PETRI_TRANSITIONS=622} [2021-12-17 23:21:30,870 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 487 predicate places. [2021-12-17 23:21:30,870 INFO L470 AbstractCegarLoop]: Abstraction has has 575 places, 622 transitions, 8952 flow [2021-12-17 23:21:30,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:30,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:30,870 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] [2021-12-17 23:21:30,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-12-17 23:21:30,870 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:30,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1357232994, now seen corresponding path program 80 times [2021-12-17 23:21:30,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:30,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946697092] [2021-12-17 23:21:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:30,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:31,163 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 23:21:31,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946697092] [2021-12-17 23:21:31,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946697092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:31,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:31,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:31,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485671305] [2021-12-17 23:21:31,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:31,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:31,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:31,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:31,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 622 transitions, 8952 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:31,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:31,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:31,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:32,547 INFO L129 PetriNetUnfolder]: 447/1417 cut-off events. [2021-12-17 23:21:32,548 INFO L130 PetriNetUnfolder]: For 27225/27225 co-relation queries the response was YES. [2021-12-17 23:21:32,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11256 conditions, 1417 events. 447/1417 cut-off events. For 27225/27225 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9510 event pairs, 52 based on Foata normal form. 1/1416 useless extension candidates. Maximal degree in co-relation 11054. Up to 961 conditions per place. [2021-12-17 23:21:32,575 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 480 selfloop transitions, 112 changer transitions 22/653 dead transitions. [2021-12-17 23:21:32,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 653 transitions, 10672 flow [2021-12-17 23:21:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:21:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:21:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1854 transitions. [2021-12-17 23:21:32,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635258358662614 [2021-12-17 23:21:32,576 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1854 transitions. [2021-12-17 23:21:32,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1854 transitions. [2021-12-17 23:21:32,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:32,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1854 transitions. [2021-12-17 23:21:32,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.97142857142857) internal successors, (1854), 35 states have internal predecessors, (1854), 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 23:21:32,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:21:32,580 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:21:32,580 INFO L186 Difference]: Start difference. First operand has 575 places, 622 transitions, 8952 flow. Second operand 35 states and 1854 transitions. [2021-12-17 23:21:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 653 transitions, 10672 flow [2021-12-17 23:21:32,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 653 transitions, 10383 flow, removed 26 selfloop flow, removed 36 redundant places. [2021-12-17 23:21:32,830 INFO L242 Difference]: Finished difference. Result has 572 places, 620 transitions, 9006 flow [2021-12-17 23:21:32,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9006, PETRI_PLACES=572, PETRI_TRANSITIONS=620} [2021-12-17 23:21:32,831 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 484 predicate places. [2021-12-17 23:21:32,831 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 620 transitions, 9006 flow [2021-12-17 23:21:32,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:32,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:32,832 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] [2021-12-17 23:21:32,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-12-17 23:21:32,832 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1989860466, now seen corresponding path program 81 times [2021-12-17 23:21:32,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:32,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128189301] [2021-12-17 23:21:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:32,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:33,188 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 23:21:33,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128189301] [2021-12-17 23:21:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128189301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:33,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:33,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:33,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052540784] [2021-12-17 23:21:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:33,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:33,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:33,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 620 transitions, 9006 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:33,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:33,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:33,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:34,567 INFO L129 PetriNetUnfolder]: 442/1402 cut-off events. [2021-12-17 23:21:34,568 INFO L130 PetriNetUnfolder]: For 26476/26476 co-relation queries the response was YES. [2021-12-17 23:21:34,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 1402 events. 442/1402 cut-off events. For 26476/26476 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9342 event pairs, 54 based on Foata normal form. 1/1401 useless extension candidates. Maximal degree in co-relation 10900. Up to 967 conditions per place. [2021-12-17 23:21:34,593 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 488 selfloop transitions, 105 changer transitions 17/649 dead transitions. [2021-12-17 23:21:34,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 649 transitions, 10559 flow [2021-12-17 23:21:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:21:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:21:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1948 transitions. [2021-12-17 23:21:34,595 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5600920069005175 [2021-12-17 23:21:34,595 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1948 transitions. [2021-12-17 23:21:34,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1948 transitions. [2021-12-17 23:21:34,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:34,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1948 transitions. [2021-12-17 23:21:34,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.648648648648646) internal successors, (1948), 37 states have internal predecessors, (1948), 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 23:21:34,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:21:34,598 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:21:34,598 INFO L186 Difference]: Start difference. First operand has 572 places, 620 transitions, 9006 flow. Second operand 37 states and 1948 transitions. [2021-12-17 23:21:34,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 649 transitions, 10559 flow [2021-12-17 23:21:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 649 transitions, 10221 flow, removed 58 selfloop flow, removed 33 redundant places. [2021-12-17 23:21:34,835 INFO L242 Difference]: Finished difference. Result has 574 places, 622 transitions, 8998 flow [2021-12-17 23:21:34,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8698, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8998, PETRI_PLACES=574, PETRI_TRANSITIONS=622} [2021-12-17 23:21:34,835 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 486 predicate places. [2021-12-17 23:21:34,835 INFO L470 AbstractCegarLoop]: Abstraction has has 574 places, 622 transitions, 8998 flow [2021-12-17 23:21:34,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:34,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:34,836 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] [2021-12-17 23:21:34,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-12-17 23:21:34,836 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1415726876, now seen corresponding path program 82 times [2021-12-17 23:21:34,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699639425] [2021-12-17 23:21:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:34,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:35,145 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 23:21:35,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699639425] [2021-12-17 23:21:35,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699639425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:35,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:35,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:35,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016630979] [2021-12-17 23:21:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:35,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:35,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:35,146 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:35,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 622 transitions, 8998 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:35,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:35,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:35,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:36,550 INFO L129 PetriNetUnfolder]: 455/1435 cut-off events. [2021-12-17 23:21:36,550 INFO L130 PetriNetUnfolder]: For 27698/27698 co-relation queries the response was YES. [2021-12-17 23:21:36,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 1435 events. 455/1435 cut-off events. For 27698/27698 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9716 event pairs, 50 based on Foata normal form. 1/1434 useless extension candidates. Maximal degree in co-relation 11280. Up to 931 conditions per place. [2021-12-17 23:21:36,576 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 451 selfloop transitions, 164 changer transitions 25/679 dead transitions. [2021-12-17 23:21:36,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 679 transitions, 11295 flow [2021-12-17 23:21:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:21:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:21:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2070 transitions. [2021-12-17 23:21:36,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5646481178396072 [2021-12-17 23:21:36,578 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2070 transitions. [2021-12-17 23:21:36,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2070 transitions. [2021-12-17 23:21:36,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:36,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2070 transitions. [2021-12-17 23:21:36,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.07692307692308) internal successors, (2070), 39 states have internal predecessors, (2070), 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 23:21:36,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:21:36,582 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:21:36,582 INFO L186 Difference]: Start difference. First operand has 574 places, 622 transitions, 8998 flow. Second operand 39 states and 2070 transitions. [2021-12-17 23:21:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 679 transitions, 11295 flow [2021-12-17 23:21:36,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 679 transitions, 10988 flow, removed 61 selfloop flow, removed 31 redundant places. [2021-12-17 23:21:36,817 INFO L242 Difference]: Finished difference. Result has 584 places, 635 transitions, 9511 flow [2021-12-17 23:21:36,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8709, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9511, PETRI_PLACES=584, PETRI_TRANSITIONS=635} [2021-12-17 23:21:36,817 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 496 predicate places. [2021-12-17 23:21:36,818 INFO L470 AbstractCegarLoop]: Abstraction has has 584 places, 635 transitions, 9511 flow [2021-12-17 23:21:36,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:36,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:36,818 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] [2021-12-17 23:21:36,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-12-17 23:21:36,818 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1852875302, now seen corresponding path program 83 times [2021-12-17 23:21:36,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:36,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840389467] [2021-12-17 23:21:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:36,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:37,135 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 23:21:37,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840389467] [2021-12-17 23:21:37,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840389467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:37,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:37,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:37,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790515379] [2021-12-17 23:21:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:37,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:37,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:37,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 635 transitions, 9511 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:37,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:37,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:37,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:38,818 INFO L129 PetriNetUnfolder]: 446/1419 cut-off events. [2021-12-17 23:21:38,818 INFO L130 PetriNetUnfolder]: For 28741/28741 co-relation queries the response was YES. [2021-12-17 23:21:38,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 1419 events. 446/1419 cut-off events. For 28741/28741 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9590 event pairs, 41 based on Foata normal form. 1/1418 useless extension candidates. Maximal degree in co-relation 11255. Up to 978 conditions per place. [2021-12-17 23:21:38,844 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 491 selfloop transitions, 113 changer transitions 22/665 dead transitions. [2021-12-17 23:21:38,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 665 transitions, 10996 flow [2021-12-17 23:21:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1904 transitions. [2021-12-17 23:21:38,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2021-12-17 23:21:38,846 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1904 transitions. [2021-12-17 23:21:38,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1904 transitions. [2021-12-17 23:21:38,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:38,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1904 transitions. [2021-12-17 23:21:38,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.888888888888886) internal successors, (1904), 36 states have internal predecessors, (1904), 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 23:21:38,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:38,849 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:38,849 INFO L186 Difference]: Start difference. First operand has 584 places, 635 transitions, 9511 flow. Second operand 36 states and 1904 transitions. [2021-12-17 23:21:38,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 665 transitions, 10996 flow [2021-12-17 23:21:39,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 665 transitions, 10510 flow, removed 127 selfloop flow, removed 30 redundant places. [2021-12-17 23:21:39,109 INFO L242 Difference]: Finished difference. Result has 590 places, 629 transitions, 9179 flow [2021-12-17 23:21:39,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9039, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9179, PETRI_PLACES=590, PETRI_TRANSITIONS=629} [2021-12-17 23:21:39,110 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 502 predicate places. [2021-12-17 23:21:39,110 INFO L470 AbstractCegarLoop]: Abstraction has has 590 places, 629 transitions, 9179 flow [2021-12-17 23:21:39,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:39,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:39,110 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] [2021-12-17 23:21:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-12-17 23:21:39,111 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash -954124512, now seen corresponding path program 84 times [2021-12-17 23:21:39,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:39,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709313631] [2021-12-17 23:21:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:39,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:39,461 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 23:21:39,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:39,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709313631] [2021-12-17 23:21:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709313631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:39,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:39,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:39,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235376187] [2021-12-17 23:21:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:39,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:39,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:39,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 629 transitions, 9179 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:39,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:39,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:39,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:41,007 INFO L129 PetriNetUnfolder]: 448/1404 cut-off events. [2021-12-17 23:21:41,007 INFO L130 PetriNetUnfolder]: For 28383/28383 co-relation queries the response was YES. [2021-12-17 23:21:41,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11431 conditions, 1404 events. 448/1404 cut-off events. For 28383/28383 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9424 event pairs, 39 based on Foata normal form. 1/1404 useless extension candidates. Maximal degree in co-relation 11226. Up to 971 conditions per place. [2021-12-17 23:21:41,033 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 484 selfloop transitions, 122 changer transitions 27/672 dead transitions. [2021-12-17 23:21:41,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 672 transitions, 11082 flow [2021-12-17 23:21:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:21:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:21:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2112 transitions. [2021-12-17 23:21:41,035 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2021-12-17 23:21:41,035 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2112 transitions. [2021-12-17 23:21:41,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2112 transitions. [2021-12-17 23:21:41,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:41,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2112 transitions. [2021-12-17 23:21:41,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.8) internal successors, (2112), 40 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:41,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:21:41,039 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:21:41,039 INFO L186 Difference]: Start difference. First operand has 590 places, 629 transitions, 9179 flow. Second operand 40 states and 2112 transitions. [2021-12-17 23:21:41,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 672 transitions, 11082 flow [2021-12-17 23:21:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 672 transitions, 10755 flow, removed 16 selfloop flow, removed 37 redundant places. [2021-12-17 23:21:41,295 INFO L242 Difference]: Finished difference. Result has 594 places, 630 transitions, 9255 flow [2021-12-17 23:21:41,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8870, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9255, PETRI_PLACES=594, PETRI_TRANSITIONS=630} [2021-12-17 23:21:41,296 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 506 predicate places. [2021-12-17 23:21:41,296 INFO L470 AbstractCegarLoop]: Abstraction has has 594 places, 630 transitions, 9255 flow [2021-12-17 23:21:41,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:41,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:41,296 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] [2021-12-17 23:21:41,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-12-17 23:21:41,296 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 355822514, now seen corresponding path program 85 times [2021-12-17 23:21:41,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:41,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671755101] [2021-12-17 23:21:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:41,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:41,581 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 23:21:41,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:41,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671755101] [2021-12-17 23:21:41,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671755101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:41,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:41,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:41,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940100721] [2021-12-17 23:21:41,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:41,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:41,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:41,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:41,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:41,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 630 transitions, 9255 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:41,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:41,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:41,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:42,885 INFO L129 PetriNetUnfolder]: 442/1414 cut-off events. [2021-12-17 23:21:42,886 INFO L130 PetriNetUnfolder]: For 27946/27946 co-relation queries the response was YES. [2021-12-17 23:21:42,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11291 conditions, 1414 events. 442/1414 cut-off events. For 27946/27946 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9532 event pairs, 41 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 11084. Up to 922 conditions per place. [2021-12-17 23:21:42,913 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 458 selfloop transitions, 136 changer transitions 31/664 dead transitions. [2021-12-17 23:21:42,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 664 transitions, 10863 flow [2021-12-17 23:21:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2021-12-17 23:21:42,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2021-12-17 23:21:42,915 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2021-12-17 23:21:42,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2021-12-17 23:21:42,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:42,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2021-12-17 23:21:42,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 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 23:21:42,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:42,918 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:42,918 INFO L186 Difference]: Start difference. First operand has 594 places, 630 transitions, 9255 flow. Second operand 36 states and 1910 transitions. [2021-12-17 23:21:42,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 664 transitions, 10863 flow [2021-12-17 23:21:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 664 transitions, 10524 flow, removed 66 selfloop flow, removed 35 redundant places. [2021-12-17 23:21:43,176 INFO L242 Difference]: Finished difference. Result has 593 places, 618 transitions, 9090 flow [2021-12-17 23:21:43,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9090, PETRI_PLACES=593, PETRI_TRANSITIONS=618} [2021-12-17 23:21:43,177 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 505 predicate places. [2021-12-17 23:21:43,177 INFO L470 AbstractCegarLoop]: Abstraction has has 593 places, 618 transitions, 9090 flow [2021-12-17 23:21:43,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:43,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:43,177 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] [2021-12-17 23:21:43,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-12-17 23:21:43,178 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash -48714834, now seen corresponding path program 86 times [2021-12-17 23:21:43,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:43,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660545796] [2021-12-17 23:21:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:43,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:43,490 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 23:21:43,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:43,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660545796] [2021-12-17 23:21:43,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660545796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:43,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:43,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869863617] [2021-12-17 23:21:43,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:43,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:43,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:43,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:43,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 618 transitions, 9090 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:43,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:43,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:43,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:45,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:21:46,534 INFO L129 PetriNetUnfolder]: 475/1527 cut-off events. [2021-12-17 23:21:46,535 INFO L130 PetriNetUnfolder]: For 30838/30838 co-relation queries the response was YES. [2021-12-17 23:21:46,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12240 conditions, 1527 events. 475/1527 cut-off events. For 30838/30838 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10656 event pairs, 39 based on Foata normal form. 1/1526 useless extension candidates. Maximal degree in co-relation 12034. Up to 912 conditions per place. [2021-12-17 23:21:46,564 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 445 selfloop transitions, 217 changer transitions 22/723 dead transitions. [2021-12-17 23:21:46,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 723 transitions, 12265 flow [2021-12-17 23:21:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 23:21:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-17 23:21:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2427 transitions. [2021-12-17 23:21:46,566 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612858464384829 [2021-12-17 23:21:46,566 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2427 transitions. [2021-12-17 23:21:46,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2427 transitions. [2021-12-17 23:21:46,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:46,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2427 transitions. [2021-12-17 23:21:46,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.76086956521739) internal successors, (2427), 46 states have internal predecessors, (2427), 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 23:21:46,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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 23:21:46,570 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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 23:21:46,570 INFO L186 Difference]: Start difference. First operand has 593 places, 618 transitions, 9090 flow. Second operand 46 states and 2427 transitions. [2021-12-17 23:21:46,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 723 transitions, 12265 flow [2021-12-17 23:21:46,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 723 transitions, 11813 flow, removed 48 selfloop flow, removed 37 redundant places. [2021-12-17 23:21:46,912 INFO L242 Difference]: Finished difference. Result has 604 places, 674 transitions, 10413 flow [2021-12-17 23:21:46,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8700, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=10413, PETRI_PLACES=604, PETRI_TRANSITIONS=674} [2021-12-17 23:21:46,913 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 516 predicate places. [2021-12-17 23:21:46,913 INFO L470 AbstractCegarLoop]: Abstraction has has 604 places, 674 transitions, 10413 flow [2021-12-17 23:21:46,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:46,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:46,913 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] [2021-12-17 23:21:46,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-12-17 23:21:46,913 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1623330086, now seen corresponding path program 87 times [2021-12-17 23:21:46,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:46,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589711677] [2021-12-17 23:21:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:46,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:47,235 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 23:21:47,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589711677] [2021-12-17 23:21:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589711677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:47,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:47,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:21:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164305163] [2021-12-17 23:21:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:47,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:21:47,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:21:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:21:47,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:47,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 674 transitions, 10413 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:47,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:47,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:47,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:50,135 INFO L129 PetriNetUnfolder]: 467/1506 cut-off events. [2021-12-17 23:21:50,135 INFO L130 PetriNetUnfolder]: For 31149/31149 co-relation queries the response was YES. [2021-12-17 23:21:50,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 1506 events. 467/1506 cut-off events. For 31149/31149 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10476 event pairs, 38 based on Foata normal form. 1/1506 useless extension candidates. Maximal degree in co-relation 12118. Up to 1072 conditions per place. [2021-12-17 23:21:50,155 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 554 selfloop transitions, 90 changer transitions 16/699 dead transitions. [2021-12-17 23:21:50,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 699 transitions, 11977 flow [2021-12-17 23:21:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1888 transitions. [2021-12-17 23:21:50,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2021-12-17 23:21:50,157 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1888 transitions. [2021-12-17 23:21:50,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1888 transitions. [2021-12-17 23:21:50,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:50,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1888 transitions. [2021-12-17 23:21:50,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.44444444444444) internal successors, (1888), 36 states have internal predecessors, (1888), 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 23:21:50,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:50,160 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:50,160 INFO L186 Difference]: Start difference. First operand has 604 places, 674 transitions, 10413 flow. Second operand 36 states and 1888 transitions. [2021-12-17 23:21:50,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 699 transitions, 11977 flow [2021-12-17 23:21:50,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 699 transitions, 11596 flow, removed 136 selfloop flow, removed 28 redundant places. [2021-12-17 23:21:50,419 INFO L242 Difference]: Finished difference. Result has 613 places, 673 transitions, 10240 flow [2021-12-17 23:21:50,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10040, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10240, PETRI_PLACES=613, PETRI_TRANSITIONS=673} [2021-12-17 23:21:50,420 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 525 predicate places. [2021-12-17 23:21:50,420 INFO L470 AbstractCegarLoop]: Abstraction has has 613 places, 673 transitions, 10240 flow [2021-12-17 23:21:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:50,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:50,420 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] [2021-12-17 23:21:50,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-12-17 23:21:50,420 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1440820988, now seen corresponding path program 88 times [2021-12-17 23:21:50,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:50,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073376250] [2021-12-17 23:21:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:50,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:50,713 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 23:21:50,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073376250] [2021-12-17 23:21:50,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073376250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:50,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:50,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:21:50,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343348178] [2021-12-17 23:21:50,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:50,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:21:50,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:21:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:21:50,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:50,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 673 transitions, 10240 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:50,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:50,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:50,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:52,743 INFO L129 PetriNetUnfolder]: 463/1491 cut-off events. [2021-12-17 23:21:52,743 INFO L130 PetriNetUnfolder]: For 29027/29027 co-relation queries the response was YES. [2021-12-17 23:21:52,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12140 conditions, 1491 events. 463/1491 cut-off events. For 29027/29027 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10343 event pairs, 52 based on Foata normal form. 1/1490 useless extension candidates. Maximal degree in co-relation 11925. Up to 1070 conditions per place. [2021-12-17 23:21:52,768 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 553 selfloop transitions, 74 changer transitions 26/692 dead transitions. [2021-12-17 23:21:52,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 692 transitions, 11630 flow [2021-12-17 23:21:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:21:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:21:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1783 transitions. [2021-12-17 23:21:52,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5578848560700876 [2021-12-17 23:21:52,769 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1783 transitions. [2021-12-17 23:21:52,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1783 transitions. [2021-12-17 23:21:52,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:52,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1783 transitions. [2021-12-17 23:21:52,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.44117647058823) internal successors, (1783), 34 states have internal predecessors, (1783), 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 23:21:52,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:52,773 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:21:52,773 INFO L186 Difference]: Start difference. First operand has 613 places, 673 transitions, 10240 flow. Second operand 34 states and 1783 transitions. [2021-12-17 23:21:52,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 692 transitions, 11630 flow [2021-12-17 23:21:53,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 692 transitions, 11417 flow, removed 16 selfloop flow, removed 35 redundant places. [2021-12-17 23:21:53,052 INFO L242 Difference]: Finished difference. Result has 609 places, 657 transitions, 9966 flow [2021-12-17 23:21:53,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9966, PETRI_PLACES=609, PETRI_TRANSITIONS=657} [2021-12-17 23:21:53,053 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 521 predicate places. [2021-12-17 23:21:53,053 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 657 transitions, 9966 flow [2021-12-17 23:21:53,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:53,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:53,053 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] [2021-12-17 23:21:53,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-12-17 23:21:53,054 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:53,054 INFO L85 PathProgramCache]: Analyzing trace with hash -549579928, now seen corresponding path program 89 times [2021-12-17 23:21:53,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676304344] [2021-12-17 23:21:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:53,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:53,431 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 23:21:53,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:53,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676304344] [2021-12-17 23:21:53,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676304344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:53,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:53,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:21:53,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709942669] [2021-12-17 23:21:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:53,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:21:53,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:53,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:21:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:21:53,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:53,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 657 transitions, 9966 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:53,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:53,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:53,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:56,211 INFO L129 PetriNetUnfolder]: 470/1527 cut-off events. [2021-12-17 23:21:56,212 INFO L130 PetriNetUnfolder]: For 31253/31253 co-relation queries the response was YES. [2021-12-17 23:21:56,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12378 conditions, 1527 events. 470/1527 cut-off events. For 31253/31253 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10715 event pairs, 51 based on Foata normal form. 1/1526 useless extension candidates. Maximal degree in co-relation 12166. Up to 998 conditions per place. [2021-12-17 23:21:56,234 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 492 selfloop transitions, 153 changer transitions 24/708 dead transitions. [2021-12-17 23:21:56,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 708 transitions, 12178 flow [2021-12-17 23:21:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 23:21:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-17 23:21:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2266 transitions. [2021-12-17 23:21:56,236 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606135576447303 [2021-12-17 23:21:56,236 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2266 transitions. [2021-12-17 23:21:56,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2266 transitions. [2021-12-17 23:21:56,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:56,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2266 transitions. [2021-12-17 23:21:56,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.69767441860465) internal successors, (2266), 43 states have internal predecessors, (2266), 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 23:21:56,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:21:56,240 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:21:56,240 INFO L186 Difference]: Start difference. First operand has 609 places, 657 transitions, 9966 flow. Second operand 43 states and 2266 transitions. [2021-12-17 23:21:56,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 708 transitions, 12178 flow [2021-12-17 23:21:56,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 708 transitions, 11848 flow, removed 46 selfloop flow, removed 38 redundant places. [2021-12-17 23:21:56,508 INFO L242 Difference]: Finished difference. Result has 602 places, 667 transitions, 10298 flow [2021-12-17 23:21:56,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9668, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10298, PETRI_PLACES=602, PETRI_TRANSITIONS=667} [2021-12-17 23:21:56,508 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 514 predicate places. [2021-12-17 23:21:56,509 INFO L470 AbstractCegarLoop]: Abstraction has has 602 places, 667 transitions, 10298 flow [2021-12-17 23:21:56,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:21:56,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:56,509 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] [2021-12-17 23:21:56,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-12-17 23:21:56,509 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:56,509 INFO L85 PathProgramCache]: Analyzing trace with hash -99570944, now seen corresponding path program 90 times [2021-12-17 23:21:56,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:56,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462711616] [2021-12-17 23:21:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:56,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:56,817 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 23:21:56,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:56,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462711616] [2021-12-17 23:21:56,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462711616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:56,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:56,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:21:56,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246348915] [2021-12-17 23:21:56,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:56,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:21:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:21:56,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:21:56,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:56,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 667 transitions, 10298 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:56,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:56,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:56,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:21:58,218 INFO L129 PetriNetUnfolder]: 462/1511 cut-off events. [2021-12-17 23:21:58,218 INFO L130 PetriNetUnfolder]: For 31513/31513 co-relation queries the response was YES. [2021-12-17 23:21:58,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12316 conditions, 1511 events. 462/1511 cut-off events. For 31513/31513 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10603 event pairs, 49 based on Foata normal form. 1/1510 useless extension candidates. Maximal degree in co-relation 12107. Up to 1023 conditions per place. [2021-12-17 23:21:58,243 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 516 selfloop transitions, 124 changer transitions 17/696 dead transitions. [2021-12-17 23:21:58,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 696 transitions, 11972 flow [2021-12-17 23:21:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:21:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:21:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1907 transitions. [2021-12-17 23:21:58,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635342789598109 [2021-12-17 23:21:58,245 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1907 transitions. [2021-12-17 23:21:58,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1907 transitions. [2021-12-17 23:21:58,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:58,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1907 transitions. [2021-12-17 23:21:58,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.97222222222222) internal successors, (1907), 36 states have internal predecessors, (1907), 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 23:21:58,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:58,248 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:21:58,248 INFO L186 Difference]: Start difference. First operand has 602 places, 667 transitions, 10298 flow. Second operand 36 states and 1907 transitions. [2021-12-17 23:21:58,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 696 transitions, 11972 flow [2021-12-17 23:21:58,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 696 transitions, 11616 flow, removed 84 selfloop flow, removed 35 redundant places. [2021-12-17 23:21:58,523 INFO L242 Difference]: Finished difference. Result has 602 places, 669 transitions, 10356 flow [2021-12-17 23:21:58,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9966, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10356, PETRI_PLACES=602, PETRI_TRANSITIONS=669} [2021-12-17 23:21:58,524 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 514 predicate places. [2021-12-17 23:21:58,524 INFO L470 AbstractCegarLoop]: Abstraction has has 602 places, 669 transitions, 10356 flow [2021-12-17 23:21:58,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:21:58,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:58,524 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] [2021-12-17 23:21:58,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-12-17 23:21:58,525 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1482646264, now seen corresponding path program 91 times [2021-12-17 23:21:58,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:58,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822151633] [2021-12-17 23:21:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:58,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:58,829 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 23:21:58,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822151633] [2021-12-17 23:21:58,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822151633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:21:58,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:21:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:21:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512841601] [2021-12-17 23:21:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:21:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:21:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:21:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:21:58,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:21:58,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 669 transitions, 10356 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:21:58,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:58,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:21:58,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:00,411 INFO L129 PetriNetUnfolder]: 462/1495 cut-off events. [2021-12-17 23:22:00,411 INFO L130 PetriNetUnfolder]: For 31981/31981 co-relation queries the response was YES. [2021-12-17 23:22:00,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12327 conditions, 1495 events. 462/1495 cut-off events. For 31981/31981 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10406 event pairs, 38 based on Foata normal form. 1/1494 useless extension candidates. Maximal degree in co-relation 12117. Up to 1046 conditions per place. [2021-12-17 23:22:00,437 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 532 selfloop transitions, 110 changer transitions 17/698 dead transitions. [2021-12-17 23:22:00,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 698 transitions, 12041 flow [2021-12-17 23:22:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:22:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:22:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1996 transitions. [2021-12-17 23:22:00,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587905935050392 [2021-12-17 23:22:00,439 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1996 transitions. [2021-12-17 23:22:00,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1996 transitions. [2021-12-17 23:22:00,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:00,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1996 transitions. [2021-12-17 23:22:00,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.526315789473685) internal successors, (1996), 38 states have internal predecessors, (1996), 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 23:22:00,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:22:00,442 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:22:00,442 INFO L186 Difference]: Start difference. First operand has 602 places, 669 transitions, 10356 flow. Second operand 38 states and 1996 transitions. [2021-12-17 23:22:00,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 698 transitions, 12041 flow [2021-12-17 23:22:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 698 transitions, 11680 flow, removed 64 selfloop flow, removed 29 redundant places. [2021-12-17 23:22:00,701 INFO L242 Difference]: Finished difference. Result has 610 places, 671 transitions, 10357 flow [2021-12-17 23:22:00,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10010, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=10357, PETRI_PLACES=610, PETRI_TRANSITIONS=671} [2021-12-17 23:22:00,702 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 522 predicate places. [2021-12-17 23:22:00,702 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 671 transitions, 10357 flow [2021-12-17 23:22:00,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:00,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:00,702 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] [2021-12-17 23:22:00,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-12-17 23:22:00,702 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1384398578, now seen corresponding path program 92 times [2021-12-17 23:22:00,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:00,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517169665] [2021-12-17 23:22:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:00,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:00,991 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 23:22:00,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:00,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517169665] [2021-12-17 23:22:00,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517169665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:00,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:00,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:00,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757300673] [2021-12-17 23:22:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:00,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:00,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:00,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:00,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 671 transitions, 10357 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:00,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:00,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:00,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:02,749 INFO L129 PetriNetUnfolder]: 462/1494 cut-off events. [2021-12-17 23:22:02,749 INFO L130 PetriNetUnfolder]: For 31773/31773 co-relation queries the response was YES. [2021-12-17 23:22:02,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 1494 events. 462/1494 cut-off events. For 31773/31773 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10476 event pairs, 37 based on Foata normal form. 1/1494 useless extension candidates. Maximal degree in co-relation 12122. Up to 1009 conditions per place. [2021-12-17 23:22:02,778 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 501 selfloop transitions, 142 changer transitions 22/704 dead transitions. [2021-12-17 23:22:02,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 704 transitions, 12031 flow [2021-12-17 23:22:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:22:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:22:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2159 transitions. [2021-12-17 23:22:02,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.560197197716658 [2021-12-17 23:22:02,780 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2159 transitions. [2021-12-17 23:22:02,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2159 transitions. [2021-12-17 23:22:02,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:02,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2159 transitions. [2021-12-17 23:22:02,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.65853658536585) internal successors, (2159), 41 states have internal predecessors, (2159), 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 23:22:02,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:22:02,783 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:22:02,783 INFO L186 Difference]: Start difference. First operand has 610 places, 671 transitions, 10357 flow. Second operand 41 states and 2159 transitions. [2021-12-17 23:22:02,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 704 transitions, 12031 flow [2021-12-17 23:22:03,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 704 transitions, 11665 flow, removed 74 selfloop flow, removed 33 redundant places. [2021-12-17 23:22:03,113 INFO L242 Difference]: Finished difference. Result has 617 places, 666 transitions, 10249 flow [2021-12-17 23:22:03,113 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10003, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10249, PETRI_PLACES=617, PETRI_TRANSITIONS=666} [2021-12-17 23:22:03,113 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 529 predicate places. [2021-12-17 23:22:03,114 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 666 transitions, 10249 flow [2021-12-17 23:22:03,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:03,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:03,114 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] [2021-12-17 23:22:03,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-12-17 23:22:03,114 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1054131510, now seen corresponding path program 93 times [2021-12-17 23:22:03,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:03,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048772775] [2021-12-17 23:22:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:03,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:03,373 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 23:22:03,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:03,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048772775] [2021-12-17 23:22:03,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048772775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:03,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:03,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:03,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802465629] [2021-12-17 23:22:03,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:03,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:03,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:03,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:03,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 666 transitions, 10249 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:03,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:03,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:03,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:05,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:22:06,099 INFO L129 PetriNetUnfolder]: 459/1500 cut-off events. [2021-12-17 23:22:06,099 INFO L130 PetriNetUnfolder]: For 31360/31360 co-relation queries the response was YES. [2021-12-17 23:22:06,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12298 conditions, 1500 events. 459/1500 cut-off events. For 31360/31360 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10538 event pairs, 41 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 12082. Up to 928 conditions per place. [2021-12-17 23:22:06,124 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 460 selfloop transitions, 177 changer transitions 31/707 dead transitions. [2021-12-17 23:22:06,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 707 transitions, 12085 flow [2021-12-17 23:22:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 23:22:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-17 23:22:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2266 transitions. [2021-12-17 23:22:06,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606135576447303 [2021-12-17 23:22:06,126 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2266 transitions. [2021-12-17 23:22:06,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2266 transitions. [2021-12-17 23:22:06,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:06,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2266 transitions. [2021-12-17 23:22:06,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.69767441860465) internal successors, (2266), 43 states have internal predecessors, (2266), 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 23:22:06,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:22:06,130 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 94.0) internal successors, (4136), 44 states have internal predecessors, (4136), 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 23:22:06,130 INFO L186 Difference]: Start difference. First operand has 617 places, 666 transitions, 10249 flow. Second operand 43 states and 2266 transitions. [2021-12-17 23:22:06,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 707 transitions, 12085 flow [2021-12-17 23:22:06,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 707 transitions, 11756 flow, removed 14 selfloop flow, removed 39 redundant places. [2021-12-17 23:22:06,449 INFO L242 Difference]: Finished difference. Result has 619 places, 654 transitions, 10200 flow [2021-12-17 23:22:06,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9934, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10200, PETRI_PLACES=619, PETRI_TRANSITIONS=654} [2021-12-17 23:22:06,449 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 531 predicate places. [2021-12-17 23:22:06,450 INFO L470 AbstractCegarLoop]: Abstraction has has 619 places, 654 transitions, 10200 flow [2021-12-17 23:22:06,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:06,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:06,450 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] [2021-12-17 23:22:06,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-12-17 23:22:06,450 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1631050932, now seen corresponding path program 94 times [2021-12-17 23:22:06,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:06,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236502547] [2021-12-17 23:22:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:06,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:06,759 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 23:22:06,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236502547] [2021-12-17 23:22:06,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236502547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:06,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:06,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:06,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581881239] [2021-12-17 23:22:06,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:06,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:06,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:06,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:06,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:06,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 654 transitions, 10200 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:06,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:06,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:06,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:09,953 INFO L129 PetriNetUnfolder]: 453/1475 cut-off events. [2021-12-17 23:22:09,953 INFO L130 PetriNetUnfolder]: For 31743/31743 co-relation queries the response was YES. [2021-12-17 23:22:09,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 1475 events. 453/1475 cut-off events. For 31743/31743 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10261 event pairs, 38 based on Foata normal form. 1/1474 useless extension candidates. Maximal degree in co-relation 12112. Up to 892 conditions per place. [2021-12-17 23:22:09,980 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 427 selfloop transitions, 204 changer transitions 27/697 dead transitions. [2021-12-17 23:22:09,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 697 transitions, 12204 flow [2021-12-17 23:22:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 23:22:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-17 23:22:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2618 transitions. [2021-12-17 23:22:09,981 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5570212765957446 [2021-12-17 23:22:09,982 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2618 transitions. [2021-12-17 23:22:09,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2618 transitions. [2021-12-17 23:22:09,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:09,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2618 transitions. [2021-12-17 23:22:09,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 52.36) internal successors, (2618), 50 states have internal predecessors, (2618), 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 23:22:09,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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 23:22:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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 23:22:09,986 INFO L186 Difference]: Start difference. First operand has 619 places, 654 transitions, 10200 flow. Second operand 50 states and 2618 transitions. [2021-12-17 23:22:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 697 transitions, 12204 flow [2021-12-17 23:22:10,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 697 transitions, 11721 flow, removed 27 selfloop flow, removed 42 redundant places. [2021-12-17 23:22:10,313 INFO L242 Difference]: Finished difference. Result has 625 places, 653 transitions, 10279 flow [2021-12-17 23:22:10,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10279, PETRI_PLACES=625, PETRI_TRANSITIONS=653} [2021-12-17 23:22:10,314 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 537 predicate places. [2021-12-17 23:22:10,314 INFO L470 AbstractCegarLoop]: Abstraction has has 625 places, 653 transitions, 10279 flow [2021-12-17 23:22:10,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:10,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:10,314 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] [2021-12-17 23:22:10,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-12-17 23:22:10,314 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash -398899116, now seen corresponding path program 95 times [2021-12-17 23:22:10,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:10,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110097051] [2021-12-17 23:22:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:10,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:10,661 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 23:22:10,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:10,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110097051] [2021-12-17 23:22:10,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110097051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:10,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:10,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:10,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693244611] [2021-12-17 23:22:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:10,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:10,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:10,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 653 transitions, 10279 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:10,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:10,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:10,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:12,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:22:13,670 INFO L129 PetriNetUnfolder]: 449/1473 cut-off events. [2021-12-17 23:22:13,670 INFO L130 PetriNetUnfolder]: For 31664/31664 co-relation queries the response was YES. [2021-12-17 23:22:13,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12358 conditions, 1473 events. 449/1473 cut-off events. For 31664/31664 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10206 event pairs, 48 based on Foata normal form. 1/1473 useless extension candidates. Maximal degree in co-relation 12142. Up to 1004 conditions per place. [2021-12-17 23:22:13,745 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 508 selfloop transitions, 118 changer transitions 22/687 dead transitions. [2021-12-17 23:22:13,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 687 transitions, 12159 flow [2021-12-17 23:22:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:22:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:22:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1954 transitions. [2021-12-17 23:22:13,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618171362852213 [2021-12-17 23:22:13,747 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1954 transitions. [2021-12-17 23:22:13,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1954 transitions. [2021-12-17 23:22:13,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:13,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1954 transitions. [2021-12-17 23:22:13,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.810810810810814) internal successors, (1954), 37 states have internal predecessors, (1954), 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 23:22:13,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:13,751 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:13,751 INFO L186 Difference]: Start difference. First operand has 625 places, 653 transitions, 10279 flow. Second operand 37 states and 1954 transitions. [2021-12-17 23:22:13,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 687 transitions, 12159 flow [2021-12-17 23:22:14,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 687 transitions, 11524 flow, removed 61 selfloop flow, removed 48 redundant places. [2021-12-17 23:22:14,030 INFO L242 Difference]: Finished difference. Result has 611 places, 651 transitions, 10020 flow [2021-12-17 23:22:14,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9692, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10020, PETRI_PLACES=611, PETRI_TRANSITIONS=651} [2021-12-17 23:22:14,030 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 523 predicate places. [2021-12-17 23:22:14,031 INFO L470 AbstractCegarLoop]: Abstraction has has 611 places, 651 transitions, 10020 flow [2021-12-17 23:22:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:14,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:14,031 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] [2021-12-17 23:22:14,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-12-17 23:22:14,031 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1376511820, now seen corresponding path program 96 times [2021-12-17 23:22:14,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:14,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599361373] [2021-12-17 23:22:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:14,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:14,424 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 23:22:14,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599361373] [2021-12-17 23:22:14,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599361373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:14,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:14,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:14,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464960358] [2021-12-17 23:22:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:14,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:14,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:14,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:14,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 651 transitions, 10020 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:14,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:14,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:14,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:16,928 INFO L129 PetriNetUnfolder]: 439/1442 cut-off events. [2021-12-17 23:22:16,928 INFO L130 PetriNetUnfolder]: For 28662/28662 co-relation queries the response was YES. [2021-12-17 23:22:16,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11772 conditions, 1442 events. 439/1442 cut-off events. For 28662/28662 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9967 event pairs, 50 based on Foata normal form. 1/1441 useless extension candidates. Maximal degree in co-relation 11560. Up to 1004 conditions per place. [2021-12-17 23:22:16,956 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 511 selfloop transitions, 82 changer transitions 37/669 dead transitions. [2021-12-17 23:22:16,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 669 transitions, 11387 flow [2021-12-17 23:22:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:22:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:22:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1840 transitions. [2021-12-17 23:22:16,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2021-12-17 23:22:16,958 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1840 transitions. [2021-12-17 23:22:16,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1840 transitions. [2021-12-17 23:22:16,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:16,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1840 transitions. [2021-12-17 23:22:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.57142857142857) internal successors, (1840), 35 states have internal predecessors, (1840), 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 23:22:16,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:16,963 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:16,963 INFO L186 Difference]: Start difference. First operand has 611 places, 651 transitions, 10020 flow. Second operand 35 states and 1840 transitions. [2021-12-17 23:22:16,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 669 transitions, 11387 flow [2021-12-17 23:22:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 669 transitions, 11052 flow, removed 44 selfloop flow, removed 36 redundant places. [2021-12-17 23:22:17,243 INFO L242 Difference]: Finished difference. Result has 606 places, 623 transitions, 9527 flow [2021-12-17 23:22:17,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9527, PETRI_PLACES=606, PETRI_TRANSITIONS=623} [2021-12-17 23:22:17,244 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 518 predicate places. [2021-12-17 23:22:17,244 INFO L470 AbstractCegarLoop]: Abstraction has has 606 places, 623 transitions, 9527 flow [2021-12-17 23:22:17,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:17,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:17,244 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] [2021-12-17 23:22:17,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-12-17 23:22:17,245 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1380066808, now seen corresponding path program 97 times [2021-12-17 23:22:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:17,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869005790] [2021-12-17 23:22:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:17,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:17,563 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 23:22:17,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869005790] [2021-12-17 23:22:17,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869005790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:17,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:17,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:17,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044586268] [2021-12-17 23:22:17,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:17,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:17,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:17,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:17,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 623 transitions, 9527 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:17,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:17,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:17,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:19,398 INFO L129 PetriNetUnfolder]: 434/1425 cut-off events. [2021-12-17 23:22:19,398 INFO L130 PetriNetUnfolder]: For 29221/29221 co-relation queries the response was YES. [2021-12-17 23:22:19,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 1425 events. 434/1425 cut-off events. For 29221/29221 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9746 event pairs, 36 based on Foata normal form. 1/1425 useless extension candidates. Maximal degree in co-relation 11353. Up to 964 conditions per place. [2021-12-17 23:22:19,422 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 479 selfloop transitions, 112 changer transitions 25/655 dead transitions. [2021-12-17 23:22:19,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 655 transitions, 11151 flow [2021-12-17 23:22:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:22:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:22:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2098 transitions. [2021-12-17 23:22:19,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5579787234042554 [2021-12-17 23:22:19,424 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2098 transitions. [2021-12-17 23:22:19,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2098 transitions. [2021-12-17 23:22:19,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:19,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2098 transitions. [2021-12-17 23:22:19,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.45) internal successors, (2098), 40 states have internal predecessors, (2098), 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 23:22:19,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:19,427 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:19,427 INFO L186 Difference]: Start difference. First operand has 606 places, 623 transitions, 9527 flow. Second operand 40 states and 2098 transitions. [2021-12-17 23:22:19,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 655 transitions, 11151 flow [2021-12-17 23:22:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 655 transitions, 10778 flow, removed 31 selfloop flow, removed 43 redundant places. [2021-12-17 23:22:19,692 INFO L242 Difference]: Finished difference. Result has 580 places, 617 transitions, 9365 flow [2021-12-17 23:22:19,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9178, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9365, PETRI_PLACES=580, PETRI_TRANSITIONS=617} [2021-12-17 23:22:19,693 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 492 predicate places. [2021-12-17 23:22:19,693 INFO L470 AbstractCegarLoop]: Abstraction has has 580 places, 617 transitions, 9365 flow [2021-12-17 23:22:19,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:19,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:19,693 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] [2021-12-17 23:22:19,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-12-17 23:22:19,693 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2077341840, now seen corresponding path program 98 times [2021-12-17 23:22:19,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:19,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804677046] [2021-12-17 23:22:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:19,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:19,995 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 23:22:19,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804677046] [2021-12-17 23:22:19,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804677046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:19,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:19,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:19,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423421357] [2021-12-17 23:22:19,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:19,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:19,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:19,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:19,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 617 transitions, 9365 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:19,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:19,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:19,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:22,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:22:22,615 INFO L129 PetriNetUnfolder]: 423/1389 cut-off events. [2021-12-17 23:22:22,615 INFO L130 PetriNetUnfolder]: For 27646/27646 co-relation queries the response was YES. [2021-12-17 23:22:22,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11195 conditions, 1389 events. 423/1389 cut-off events. For 27646/27646 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9449 event pairs, 36 based on Foata normal form. 1/1388 useless extension candidates. Maximal degree in co-relation 10998. Up to 960 conditions per place. [2021-12-17 23:22:22,638 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 478 selfloop transitions, 86 changer transitions 35/638 dead transitions. [2021-12-17 23:22:22,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 638 transitions, 10717 flow [2021-12-17 23:22:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:22:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:22:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1942 transitions. [2021-12-17 23:22:22,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583668775158137 [2021-12-17 23:22:22,639 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1942 transitions. [2021-12-17 23:22:22,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1942 transitions. [2021-12-17 23:22:22,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:22,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1942 transitions. [2021-12-17 23:22:22,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.486486486486484) internal successors, (1942), 37 states have internal predecessors, (1942), 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 23:22:22,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:22,643 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:22,643 INFO L186 Difference]: Start difference. First operand has 580 places, 617 transitions, 9365 flow. Second operand 37 states and 1942 transitions. [2021-12-17 23:22:22,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 638 transitions, 10717 flow [2021-12-17 23:22:22,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 638 transitions, 10308 flow, removed 69 selfloop flow, removed 39 redundant places. [2021-12-17 23:22:22,885 INFO L242 Difference]: Finished difference. Result has 574 places, 591 transitions, 8645 flow [2021-12-17 23:22:22,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8966, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8645, PETRI_PLACES=574, PETRI_TRANSITIONS=591} [2021-12-17 23:22:22,885 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 486 predicate places. [2021-12-17 23:22:22,885 INFO L470 AbstractCegarLoop]: Abstraction has has 574 places, 591 transitions, 8645 flow [2021-12-17 23:22:22,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:22,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:22,886 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] [2021-12-17 23:22:22,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-12-17 23:22:22,886 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash -876736206, now seen corresponding path program 99 times [2021-12-17 23:22:22,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:22,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751582772] [2021-12-17 23:22:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:22,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:23,195 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 23:22:23,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751582772] [2021-12-17 23:22:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751582772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:23,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:23,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787876451] [2021-12-17 23:22:23,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:23,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:23,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:23,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:23,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:23,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:23,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 591 transitions, 8645 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:23,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:23,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:23,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:24,590 INFO L129 PetriNetUnfolder]: 420/1375 cut-off events. [2021-12-17 23:22:24,591 INFO L130 PetriNetUnfolder]: For 26046/26046 co-relation queries the response was YES. [2021-12-17 23:22:24,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10819 conditions, 1375 events. 420/1375 cut-off events. For 26046/26046 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9243 event pairs, 38 based on Foata normal form. 1/1375 useless extension candidates. Maximal degree in co-relation 10624. Up to 935 conditions per place. [2021-12-17 23:22:24,613 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 454 selfloop transitions, 110 changer transitions 17/620 dead transitions. [2021-12-17 23:22:24,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 620 transitions, 10133 flow [2021-12-17 23:22:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:22:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:22:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1952 transitions. [2021-12-17 23:22:24,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5612420931569868 [2021-12-17 23:22:24,616 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1952 transitions. [2021-12-17 23:22:24,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1952 transitions. [2021-12-17 23:22:24,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:24,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1952 transitions. [2021-12-17 23:22:24,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.75675675675676) internal successors, (1952), 37 states have internal predecessors, (1952), 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 23:22:24,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:24,620 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:24,620 INFO L186 Difference]: Start difference. First operand has 574 places, 591 transitions, 8645 flow. Second operand 37 states and 1952 transitions. [2021-12-17 23:22:24,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 620 transitions, 10133 flow [2021-12-17 23:22:24,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 620 transitions, 9710 flow, removed 53 selfloop flow, removed 44 redundant places. [2021-12-17 23:22:24,843 INFO L242 Difference]: Finished difference. Result has 548 places, 593 transitions, 8595 flow [2021-12-17 23:22:24,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8595, PETRI_PLACES=548, PETRI_TRANSITIONS=593} [2021-12-17 23:22:24,843 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 460 predicate places. [2021-12-17 23:22:24,843 INFO L470 AbstractCegarLoop]: Abstraction has has 548 places, 593 transitions, 8595 flow [2021-12-17 23:22:24,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:24,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:24,844 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] [2021-12-17 23:22:24,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-12-17 23:22:24,844 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 701058008, now seen corresponding path program 100 times [2021-12-17 23:22:24,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:24,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363215363] [2021-12-17 23:22:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:24,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:25,122 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 23:22:25,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363215363] [2021-12-17 23:22:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363215363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:25,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:25,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:22:25,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740705755] [2021-12-17 23:22:25,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:25,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:22:25,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:22:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:22:25,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:25,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 593 transitions, 8595 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:25,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:25,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:25,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:26,345 INFO L129 PetriNetUnfolder]: 415/1354 cut-off events. [2021-12-17 23:22:26,345 INFO L130 PetriNetUnfolder]: For 24206/24206 co-relation queries the response was YES. [2021-12-17 23:22:26,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10573 conditions, 1354 events. 415/1354 cut-off events. For 24206/24206 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9042 event pairs, 50 based on Foata normal form. 1/1354 useless extension candidates. Maximal degree in co-relation 10386. Up to 931 conditions per place. [2021-12-17 23:22:26,364 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 452 selfloop transitions, 102 changer transitions 18/611 dead transitions. [2021-12-17 23:22:26,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 611 transitions, 9840 flow [2021-12-17 23:22:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:22:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:22:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1748 transitions. [2021-12-17 23:22:26,368 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635074145712443 [2021-12-17 23:22:26,368 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1748 transitions. [2021-12-17 23:22:26,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1748 transitions. [2021-12-17 23:22:26,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:26,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1748 transitions. [2021-12-17 23:22:26,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.96969696969697) internal successors, (1748), 33 states have internal predecessors, (1748), 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 23:22:26,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:22:26,371 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:22:26,371 INFO L186 Difference]: Start difference. First operand has 548 places, 593 transitions, 8595 flow. Second operand 33 states and 1748 transitions. [2021-12-17 23:22:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 611 transitions, 9840 flow [2021-12-17 23:22:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 611 transitions, 9500 flow, removed 56 selfloop flow, removed 32 redundant places. [2021-12-17 23:22:26,570 INFO L242 Difference]: Finished difference. Result has 546 places, 584 transitions, 8423 flow [2021-12-17 23:22:26,570 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8423, PETRI_PLACES=546, PETRI_TRANSITIONS=584} [2021-12-17 23:22:26,571 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 458 predicate places. [2021-12-17 23:22:26,571 INFO L470 AbstractCegarLoop]: Abstraction has has 546 places, 584 transitions, 8423 flow [2021-12-17 23:22:26,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:26,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:26,571 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] [2021-12-17 23:22:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-12-17 23:22:26,572 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -282491380, now seen corresponding path program 101 times [2021-12-17 23:22:26,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:26,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176579273] [2021-12-17 23:22:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:26,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:26,841 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 23:22:26,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:26,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176579273] [2021-12-17 23:22:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176579273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:26,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:26,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:22:26,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623442632] [2021-12-17 23:22:26,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:26,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:22:26,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:22:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:22:26,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:26,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 584 transitions, 8423 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:26,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:26,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:26,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:28,062 INFO L129 PetriNetUnfolder]: 410/1334 cut-off events. [2021-12-17 23:22:28,062 INFO L130 PetriNetUnfolder]: For 23819/23819 co-relation queries the response was YES. [2021-12-17 23:22:28,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10426 conditions, 1334 events. 410/1334 cut-off events. For 23819/23819 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8919 event pairs, 39 based on Foata normal form. 1/1332 useless extension candidates. Maximal degree in co-relation 10238. Up to 927 conditions per place. [2021-12-17 23:22:28,079 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 451 selfloop transitions, 88 changer transitions 24/602 dead transitions. [2021-12-17 23:22:28,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 602 transitions, 9650 flow [2021-12-17 23:22:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:22:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:22:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-12-17 23:22:28,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-12-17 23:22:28,080 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-12-17 23:22:28,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-12-17 23:22:28,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:28,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-12-17 23:22:28,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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 23:22:28,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:22:28,083 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:22:28,084 INFO L186 Difference]: Start difference. First operand has 546 places, 584 transitions, 8423 flow. Second operand 33 states and 1745 transitions. [2021-12-17 23:22:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 602 transitions, 9650 flow [2021-12-17 23:22:28,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 602 transitions, 9409 flow, removed 13 selfloop flow, removed 31 redundant places. [2021-12-17 23:22:28,256 INFO L242 Difference]: Finished difference. Result has 540 places, 569 transitions, 8234 flow [2021-12-17 23:22:28,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8234, PETRI_PLACES=540, PETRI_TRANSITIONS=569} [2021-12-17 23:22:28,257 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 452 predicate places. [2021-12-17 23:22:28,257 INFO L470 AbstractCegarLoop]: Abstraction has has 540 places, 569 transitions, 8234 flow [2021-12-17 23:22:28,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:28,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:28,257 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] [2021-12-17 23:22:28,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-12-17 23:22:28,258 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash -269863002, now seen corresponding path program 102 times [2021-12-17 23:22:28,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:28,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94796003] [2021-12-17 23:22:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:28,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:28,606 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 23:22:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94796003] [2021-12-17 23:22:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94796003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:28,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:28,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:22:28,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576434353] [2021-12-17 23:22:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:22:28,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:22:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:22:28,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:28,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 569 transitions, 8234 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:28,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:28,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:28,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:31,326 INFO L129 PetriNetUnfolder]: 407/1332 cut-off events. [2021-12-17 23:22:31,327 INFO L130 PetriNetUnfolder]: For 23425/23425 co-relation queries the response was YES. [2021-12-17 23:22:31,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10378 conditions, 1332 events. 407/1332 cut-off events. For 23425/23425 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8874 event pairs, 41 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 10191. Up to 872 conditions per place. [2021-12-17 23:22:31,393 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 413 selfloop transitions, 136 changer transitions 17/605 dead transitions. [2021-12-17 23:22:31,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 605 transitions, 9826 flow [2021-12-17 23:22:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:22:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:22:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1954 transitions. [2021-12-17 23:22:31,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618171362852213 [2021-12-17 23:22:31,395 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1954 transitions. [2021-12-17 23:22:31,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1954 transitions. [2021-12-17 23:22:31,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:31,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1954 transitions. [2021-12-17 23:22:31,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.810810810810814) internal successors, (1954), 37 states have internal predecessors, (1954), 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 23:22:31,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:31,399 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:31,399 INFO L186 Difference]: Start difference. First operand has 540 places, 569 transitions, 8234 flow. Second operand 37 states and 1954 transitions. [2021-12-17 23:22:31,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 605 transitions, 9826 flow [2021-12-17 23:22:31,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 605 transitions, 9511 flow, removed 38 selfloop flow, removed 38 redundant places. [2021-12-17 23:22:31,600 INFO L242 Difference]: Finished difference. Result has 528 places, 572 transitions, 8371 flow [2021-12-17 23:22:31,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7931, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8371, PETRI_PLACES=528, PETRI_TRANSITIONS=572} [2021-12-17 23:22:31,601 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 440 predicate places. [2021-12-17 23:22:31,601 INFO L470 AbstractCegarLoop]: Abstraction has has 528 places, 572 transitions, 8371 flow [2021-12-17 23:22:31,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:31,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:31,601 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] [2021-12-17 23:22:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-12-17 23:22:31,601 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -212467272, now seen corresponding path program 103 times [2021-12-17 23:22:31,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:31,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830563622] [2021-12-17 23:22:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:31,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:31,907 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 23:22:31,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830563622] [2021-12-17 23:22:31,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830563622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:31,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:31,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:31,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980122404] [2021-12-17 23:22:31,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:31,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:31,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:31,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:31,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 572 transitions, 8371 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:31,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:31,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:31,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:33,864 INFO L129 PetriNetUnfolder]: 421/1395 cut-off events. [2021-12-17 23:22:33,865 INFO L130 PetriNetUnfolder]: For 24153/24153 co-relation queries the response was YES. [2021-12-17 23:22:33,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10863 conditions, 1395 events. 421/1395 cut-off events. For 24153/24153 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9556 event pairs, 47 based on Foata normal form. 1/1394 useless extension candidates. Maximal degree in co-relation 10682. Up to 799 conditions per place. [2021-12-17 23:22:33,888 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 349 selfloop transitions, 225 changer transitions 21/634 dead transitions. [2021-12-17 23:22:33,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 634 transitions, 10605 flow [2021-12-17 23:22:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 23:22:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-17 23:22:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2425 transitions. [2021-12-17 23:22:33,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5608233117483812 [2021-12-17 23:22:33,890 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2425 transitions. [2021-12-17 23:22:33,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2425 transitions. [2021-12-17 23:22:33,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:33,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2425 transitions. [2021-12-17 23:22:33,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.71739130434783) internal successors, (2425), 46 states have internal predecessors, (2425), 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 23:22:33,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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 23:22:33,894 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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 23:22:33,894 INFO L186 Difference]: Start difference. First operand has 528 places, 572 transitions, 8371 flow. Second operand 46 states and 2425 transitions. [2021-12-17 23:22:33,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 634 transitions, 10605 flow [2021-12-17 23:22:34,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 634 transitions, 10257 flow, removed 59 selfloop flow, removed 32 redundant places. [2021-12-17 23:22:34,115 INFO L242 Difference]: Finished difference. Result has 547 places, 591 transitions, 9054 flow [2021-12-17 23:22:34,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8032, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=9054, PETRI_PLACES=547, PETRI_TRANSITIONS=591} [2021-12-17 23:22:34,116 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 459 predicate places. [2021-12-17 23:22:34,116 INFO L470 AbstractCegarLoop]: Abstraction has has 547 places, 591 transitions, 9054 flow [2021-12-17 23:22:34,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:34,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:34,117 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] [2021-12-17 23:22:34,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-12-17 23:22:34,117 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 97904228, now seen corresponding path program 104 times [2021-12-17 23:22:34,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394766891] [2021-12-17 23:22:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:34,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:34,432 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 23:22:34,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:34,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394766891] [2021-12-17 23:22:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394766891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:34,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:34,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:34,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428082270] [2021-12-17 23:22:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:34,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:34,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:34,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:34,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 591 transitions, 9054 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:34,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:34,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:34,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:36,694 INFO L129 PetriNetUnfolder]: 414/1376 cut-off events. [2021-12-17 23:22:36,695 INFO L130 PetriNetUnfolder]: For 25046/25046 co-relation queries the response was YES. [2021-12-17 23:22:36,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11038 conditions, 1376 events. 414/1376 cut-off events. For 25046/25046 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9385 event pairs, 49 based on Foata normal form. 1/1375 useless extension candidates. Maximal degree in co-relation 10850. Up to 966 conditions per place. [2021-12-17 23:22:36,716 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 477 selfloop transitions, 84 changer transitions 16/616 dead transitions. [2021-12-17 23:22:36,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 616 transitions, 10447 flow [2021-12-17 23:22:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:22:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:22:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1889 transitions. [2021-12-17 23:22:36,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5582151300236406 [2021-12-17 23:22:36,718 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1889 transitions. [2021-12-17 23:22:36,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1889 transitions. [2021-12-17 23:22:36,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1889 transitions. [2021-12-17 23:22:36,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.47222222222222) internal successors, (1889), 36 states have internal predecessors, (1889), 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 23:22:36,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:22:36,721 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:22:36,721 INFO L186 Difference]: Start difference. First operand has 547 places, 591 transitions, 9054 flow. Second operand 36 states and 1889 transitions. [2021-12-17 23:22:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 616 transitions, 10447 flow [2021-12-17 23:22:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 616 transitions, 10076 flow, removed 96 selfloop flow, removed 32 redundant places. [2021-12-17 23:22:36,919 INFO L242 Difference]: Finished difference. Result has 552 places, 590 transitions, 8873 flow [2021-12-17 23:22:36,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8873, PETRI_PLACES=552, PETRI_TRANSITIONS=590} [2021-12-17 23:22:36,920 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 464 predicate places. [2021-12-17 23:22:36,920 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 590 transitions, 8873 flow [2021-12-17 23:22:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:36,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:36,920 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] [2021-12-17 23:22:36,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-12-17 23:22:36,920 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -718342178, now seen corresponding path program 105 times [2021-12-17 23:22:36,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068510285] [2021-12-17 23:22:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:36,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:37,231 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 23:22:37,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068510285] [2021-12-17 23:22:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068510285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:37,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:37,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195995664] [2021-12-17 23:22:37,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:37,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:37,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 590 transitions, 8873 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:37,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:37,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:37,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:39,108 INFO L129 PetriNetUnfolder]: 410/1362 cut-off events. [2021-12-17 23:22:39,108 INFO L130 PetriNetUnfolder]: For 24838/24838 co-relation queries the response was YES. [2021-12-17 23:22:39,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10847 conditions, 1362 events. 410/1362 cut-off events. For 24838/24838 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9239 event pairs, 37 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 10655. Up to 964 conditions per place. [2021-12-17 23:22:39,133 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 475 selfloop transitions, 72 changer transitions 23/609 dead transitions. [2021-12-17 23:22:39,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 609 transitions, 10101 flow [2021-12-17 23:22:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:22:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:22:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1784 transitions. [2021-12-17 23:22:39,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.55819774718398 [2021-12-17 23:22:39,135 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1784 transitions. [2021-12-17 23:22:39,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1784 transitions. [2021-12-17 23:22:39,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:39,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1784 transitions. [2021-12-17 23:22:39,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.470588235294116) internal successors, (1784), 34 states have internal predecessors, (1784), 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 23:22:39,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:22:39,138 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:22:39,138 INFO L186 Difference]: Start difference. First operand has 552 places, 590 transitions, 8873 flow. Second operand 34 states and 1784 transitions. [2021-12-17 23:22:39,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 609 transitions, 10101 flow [2021-12-17 23:22:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 609 transitions, 9902 flow, removed 15 selfloop flow, removed 35 redundant places. [2021-12-17 23:22:39,387 INFO L242 Difference]: Finished difference. Result has 548 places, 577 transitions, 8623 flow [2021-12-17 23:22:39,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8680, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8623, PETRI_PLACES=548, PETRI_TRANSITIONS=577} [2021-12-17 23:22:39,387 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 460 predicate places. [2021-12-17 23:22:39,387 INFO L470 AbstractCegarLoop]: Abstraction has has 548 places, 577 transitions, 8623 flow [2021-12-17 23:22:39,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:39,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:39,388 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] [2021-12-17 23:22:39,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-12-17 23:22:39,388 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash 131786484, now seen corresponding path program 106 times [2021-12-17 23:22:39,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:39,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788359520] [2021-12-17 23:22:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:39,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:39,706 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 23:22:39,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788359520] [2021-12-17 23:22:39,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788359520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:39,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:39,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:39,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144345096] [2021-12-17 23:22:39,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:39,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:39,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:39,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:39,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 577 transitions, 8623 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:39,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:39,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:39,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:41,066 INFO L129 PetriNetUnfolder]: 410/1361 cut-off events. [2021-12-17 23:22:41,066 INFO L130 PetriNetUnfolder]: For 24403/24403 co-relation queries the response was YES. [2021-12-17 23:22:41,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10802 conditions, 1361 events. 410/1361 cut-off events. For 24403/24403 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9231 event pairs, 47 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 10613. Up to 883 conditions per place. [2021-12-17 23:22:41,093 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 409 selfloop transitions, 142 changer transitions 21/611 dead transitions. [2021-12-17 23:22:41,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 611 transitions, 10166 flow [2021-12-17 23:22:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:22:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:22:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2104 transitions. [2021-12-17 23:22:41,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-12-17 23:22:41,095 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2104 transitions. [2021-12-17 23:22:41,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2104 transitions. [2021-12-17 23:22:41,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:41,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2104 transitions. [2021-12-17 23:22:41,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.6) internal successors, (2104), 40 states have internal predecessors, (2104), 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 23:22:41,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:41,099 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:41,099 INFO L186 Difference]: Start difference. First operand has 548 places, 577 transitions, 8623 flow. Second operand 40 states and 2104 transitions. [2021-12-17 23:22:41,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 611 transitions, 10166 flow [2021-12-17 23:22:41,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 611 transitions, 9837 flow, removed 35 selfloop flow, removed 39 redundant places. [2021-12-17 23:22:41,323 INFO L242 Difference]: Finished difference. Result has 533 places, 573 transitions, 8602 flow [2021-12-17 23:22:41,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8602, PETRI_PLACES=533, PETRI_TRANSITIONS=573} [2021-12-17 23:22:41,323 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 445 predicate places. [2021-12-17 23:22:41,323 INFO L470 AbstractCegarLoop]: Abstraction has has 533 places, 573 transitions, 8602 flow [2021-12-17 23:22:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:41,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:41,324 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] [2021-12-17 23:22:41,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-12-17 23:22:41,324 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1029423562, now seen corresponding path program 107 times [2021-12-17 23:22:41,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:41,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050282882] [2021-12-17 23:22:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:41,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:41,621 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 23:22:41,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:41,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050282882] [2021-12-17 23:22:41,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050282882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:41,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:41,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:22:41,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936162702] [2021-12-17 23:22:41,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:41,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:22:41,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:22:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:22:41,623 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:41,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 573 transitions, 8602 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:41,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:41,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:41,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:42,921 INFO L129 PetriNetUnfolder]: 402/1327 cut-off events. [2021-12-17 23:22:42,921 INFO L130 PetriNetUnfolder]: For 23934/23934 co-relation queries the response was YES. [2021-12-17 23:22:42,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10530 conditions, 1327 events. 402/1327 cut-off events. For 23934/23934 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8912 event pairs, 37 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 10350. Up to 876 conditions per place. [2021-12-17 23:22:42,942 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 416 selfloop transitions, 105 changer transitions 38/598 dead transitions. [2021-12-17 23:22:42,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 598 transitions, 9898 flow [2021-12-17 23:22:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:22:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:22:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1899 transitions. [2021-12-17 23:22:42,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5611702127659575 [2021-12-17 23:22:42,944 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1899 transitions. [2021-12-17 23:22:42,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1899 transitions. [2021-12-17 23:22:42,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:42,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1899 transitions. [2021-12-17 23:22:42,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.75) internal successors, (1899), 36 states have internal predecessors, (1899), 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 23:22:42,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:22:42,947 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:22:42,947 INFO L186 Difference]: Start difference. First operand has 533 places, 573 transitions, 8602 flow. Second operand 36 states and 1899 transitions. [2021-12-17 23:22:42,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 598 transitions, 9898 flow [2021-12-17 23:22:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 598 transitions, 9503 flow, removed 54 selfloop flow, removed 36 redundant places. [2021-12-17 23:22:43,161 INFO L242 Difference]: Finished difference. Result has 531 places, 544 transitions, 7882 flow [2021-12-17 23:22:43,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8215, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7882, PETRI_PLACES=531, PETRI_TRANSITIONS=544} [2021-12-17 23:22:43,162 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 443 predicate places. [2021-12-17 23:22:43,162 INFO L470 AbstractCegarLoop]: Abstraction has has 531 places, 544 transitions, 7882 flow [2021-12-17 23:22:43,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:43,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:43,162 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] [2021-12-17 23:22:43,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-12-17 23:22:43,162 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash 398982574, now seen corresponding path program 108 times [2021-12-17 23:22:43,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:43,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361362323] [2021-12-17 23:22:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:43,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:43,523 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 23:22:43,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361362323] [2021-12-17 23:22:43,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361362323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:43,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:43,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835130117] [2021-12-17 23:22:43,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:43,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:43,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:43,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:43,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 544 transitions, 7882 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:43,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:43,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:43,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:44,762 INFO L129 PetriNetUnfolder]: 387/1282 cut-off events. [2021-12-17 23:22:44,763 INFO L130 PetriNetUnfolder]: For 22794/22794 co-relation queries the response was YES. [2021-12-17 23:22:44,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10031 conditions, 1282 events. 387/1282 cut-off events. For 22794/22794 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8533 event pairs, 39 based on Foata normal form. 1/1281 useless extension candidates. Maximal degree in co-relation 9850. Up to 890 conditions per place. [2021-12-17 23:22:44,784 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 415 selfloop transitions, 71 changer transitions 37/562 dead transitions. [2021-12-17 23:22:44,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 562 transitions, 9026 flow [2021-12-17 23:22:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:22:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:22:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1791 transitions. [2021-12-17 23:22:44,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603879849812266 [2021-12-17 23:22:44,785 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1791 transitions. [2021-12-17 23:22:44,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1791 transitions. [2021-12-17 23:22:44,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:44,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1791 transitions. [2021-12-17 23:22:44,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.6764705882353) internal successors, (1791), 34 states have internal predecessors, (1791), 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 23:22:44,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:22:44,789 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:22:44,789 INFO L186 Difference]: Start difference. First operand has 531 places, 544 transitions, 7882 flow. Second operand 34 states and 1791 transitions. [2021-12-17 23:22:44,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 562 transitions, 9026 flow [2021-12-17 23:22:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 562 transitions, 8551 flow, removed 78 selfloop flow, removed 42 redundant places. [2021-12-17 23:22:44,969 INFO L242 Difference]: Finished difference. Result has 514 places, 516 transitions, 7266 flow [2021-12-17 23:22:44,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7266, PETRI_PLACES=514, PETRI_TRANSITIONS=516} [2021-12-17 23:22:44,970 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 426 predicate places. [2021-12-17 23:22:44,970 INFO L470 AbstractCegarLoop]: Abstraction has has 514 places, 516 transitions, 7266 flow [2021-12-17 23:22:44,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:44,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:44,970 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] [2021-12-17 23:22:44,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-12-17 23:22:44,970 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 318972958, now seen corresponding path program 109 times [2021-12-17 23:22:44,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135532116] [2021-12-17 23:22:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:44,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:45,289 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 23:22:45,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135532116] [2021-12-17 23:22:45,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135532116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:45,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:45,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:45,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778940660] [2021-12-17 23:22:45,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:45,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:45,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:45,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:45,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 516 transitions, 7266 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:45,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:45,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:45,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:47,088 INFO L129 PetriNetUnfolder]: 387/1285 cut-off events. [2021-12-17 23:22:47,088 INFO L130 PetriNetUnfolder]: For 24108/24108 co-relation queries the response was YES. [2021-12-17 23:22:47,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9926 conditions, 1285 events. 387/1285 cut-off events. For 24108/24108 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8575 event pairs, 35 based on Foata normal form. 1/1285 useless extension candidates. Maximal degree in co-relation 9752. Up to 886 conditions per place. [2021-12-17 23:22:47,107 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 413 selfloop transitions, 75 changer transitions 23/550 dead transitions. [2021-12-17 23:22:47,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 550 transitions, 8804 flow [2021-12-17 23:22:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:22:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:22:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1841 transitions. [2021-12-17 23:22:47,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-12-17 23:22:47,109 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1841 transitions. [2021-12-17 23:22:47,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1841 transitions. [2021-12-17 23:22:47,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:47,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1841 transitions. [2021-12-17 23:22:47,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.6) internal successors, (1841), 35 states have internal predecessors, (1841), 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 23:22:47,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:47,112 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:47,112 INFO L186 Difference]: Start difference. First operand has 514 places, 516 transitions, 7266 flow. Second operand 35 states and 1841 transitions. [2021-12-17 23:22:47,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 550 transitions, 8804 flow [2021-12-17 23:22:47,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 550 transitions, 8514 flow, removed 26 selfloop flow, removed 42 redundant places. [2021-12-17 23:22:47,290 INFO L242 Difference]: Finished difference. Result has 489 places, 516 transitions, 7242 flow [2021-12-17 23:22:47,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7242, PETRI_PLACES=489, PETRI_TRANSITIONS=516} [2021-12-17 23:22:47,291 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 401 predicate places. [2021-12-17 23:22:47,291 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 516 transitions, 7242 flow [2021-12-17 23:22:47,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:47,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:47,292 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] [2021-12-17 23:22:47,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-12-17 23:22:47,292 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1844361906, now seen corresponding path program 110 times [2021-12-17 23:22:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186289136] [2021-12-17 23:22:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:47,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:47,591 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 23:22:47,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186289136] [2021-12-17 23:22:47,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186289136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:47,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:47,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:47,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785484443] [2021-12-17 23:22:47,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:47,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:47,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:47,593 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:47,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 516 transitions, 7242 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:47,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:47,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:47,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:48,892 INFO L129 PetriNetUnfolder]: 376/1251 cut-off events. [2021-12-17 23:22:48,892 INFO L130 PetriNetUnfolder]: For 23104/23104 co-relation queries the response was YES. [2021-12-17 23:22:48,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9612 conditions, 1251 events. 376/1251 cut-off events. For 23104/23104 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8260 event pairs, 48 based on Foata normal form. 1/1250 useless extension candidates. Maximal degree in co-relation 9443. Up to 838 conditions per place. [2021-12-17 23:22:48,912 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 385 selfloop transitions, 93 changer transitions 23/540 dead transitions. [2021-12-17 23:22:48,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 540 transitions, 8418 flow [2021-12-17 23:22:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:22:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:22:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1843 transitions. [2021-12-17 23:22:48,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601823708206687 [2021-12-17 23:22:48,914 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1843 transitions. [2021-12-17 23:22:48,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1843 transitions. [2021-12-17 23:22:48,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:48,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1843 transitions. [2021-12-17 23:22:48,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.65714285714286) internal successors, (1843), 35 states have internal predecessors, (1843), 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 23:22:48,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:48,917 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:22:48,917 INFO L186 Difference]: Start difference. First operand has 489 places, 516 transitions, 7242 flow. Second operand 35 states and 1843 transitions. [2021-12-17 23:22:48,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 540 transitions, 8418 flow [2021-12-17 23:22:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 540 transitions, 8208 flow, removed 42 selfloop flow, removed 32 redundant places. [2021-12-17 23:22:49,105 INFO L242 Difference]: Finished difference. Result has 489 places, 501 transitions, 7038 flow [2021-12-17 23:22:49,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7040, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7038, PETRI_PLACES=489, PETRI_TRANSITIONS=501} [2021-12-17 23:22:49,106 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 401 predicate places. [2021-12-17 23:22:49,106 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 501 transitions, 7038 flow [2021-12-17 23:22:49,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:49,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:49,106 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] [2021-12-17 23:22:49,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-12-17 23:22:49,107 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash 40903188, now seen corresponding path program 111 times [2021-12-17 23:22:49,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143573042] [2021-12-17 23:22:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:49,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:49,405 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 23:22:49,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143573042] [2021-12-17 23:22:49,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143573042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:49,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:49,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:22:49,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889444994] [2021-12-17 23:22:49,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:22:49,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:22:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:22:49,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:49,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 501 transitions, 7038 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:49,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:49,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:49,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:50,631 INFO L129 PetriNetUnfolder]: 372/1233 cut-off events. [2021-12-17 23:22:50,631 INFO L130 PetriNetUnfolder]: For 22178/22178 co-relation queries the response was YES. [2021-12-17 23:22:50,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9439 conditions, 1233 events. 372/1233 cut-off events. For 22178/22178 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8083 event pairs, 51 based on Foata normal form. 1/1232 useless extension candidates. Maximal degree in co-relation 9272. Up to 826 conditions per place. [2021-12-17 23:22:50,650 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 372 selfloop transitions, 57 changer transitions 58/526 dead transitions. [2021-12-17 23:22:50,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 526 transitions, 8173 flow [2021-12-17 23:22:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:22:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:22:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1690 transitions. [2021-12-17 23:22:50,652 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618351063829787 [2021-12-17 23:22:50,652 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1690 transitions. [2021-12-17 23:22:50,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1690 transitions. [2021-12-17 23:22:50,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:50,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1690 transitions. [2021-12-17 23:22:50,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.8125) internal successors, (1690), 32 states have internal predecessors, (1690), 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 23:22:50,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:22:50,655 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:22:50,655 INFO L186 Difference]: Start difference. First operand has 489 places, 501 transitions, 7038 flow. Second operand 32 states and 1690 transitions. [2021-12-17 23:22:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 526 transitions, 8173 flow [2021-12-17 23:22:50,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 526 transitions, 7818 flow, removed 34 selfloop flow, removed 35 redundant places. [2021-12-17 23:22:50,827 INFO L242 Difference]: Finished difference. Result has 473 places, 459 transitions, 6111 flow [2021-12-17 23:22:50,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6111, PETRI_PLACES=473, PETRI_TRANSITIONS=459} [2021-12-17 23:22:50,828 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 385 predicate places. [2021-12-17 23:22:50,828 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 459 transitions, 6111 flow [2021-12-17 23:22:50,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:22:50,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:50,828 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] [2021-12-17 23:22:50,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-12-17 23:22:50,828 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2111138094, now seen corresponding path program 112 times [2021-12-17 23:22:50,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:50,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448985379] [2021-12-17 23:22:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:50,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:51,146 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 23:22:51,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448985379] [2021-12-17 23:22:51,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448985379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:51,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:51,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:51,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345144186] [2021-12-17 23:22:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:51,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:51,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:51,148 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:51,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 459 transitions, 6111 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:51,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:51,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:51,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:53,159 INFO L129 PetriNetUnfolder]: 367/1198 cut-off events. [2021-12-17 23:22:53,159 INFO L130 PetriNetUnfolder]: For 22278/22278 co-relation queries the response was YES. [2021-12-17 23:22:53,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 1198 events. 367/1198 cut-off events. For 22278/22278 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7762 event pairs, 51 based on Foata normal form. 1/1197 useless extension candidates. Maximal degree in co-relation 8868. Up to 789 conditions per place. [2021-12-17 23:22:53,178 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 335 selfloop transitions, 103 changer transitions 26/503 dead transitions. [2021-12-17 23:22:53,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 503 transitions, 7664 flow [2021-12-17 23:22:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:22:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:22:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2106 transitions. [2021-12-17 23:22:53,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601063829787234 [2021-12-17 23:22:53,180 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2106 transitions. [2021-12-17 23:22:53,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2106 transitions. [2021-12-17 23:22:53,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:53,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2106 transitions. [2021-12-17 23:22:53,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.65) internal successors, (2106), 40 states have internal predecessors, (2106), 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 23:22:53,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:53,183 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:22:53,184 INFO L186 Difference]: Start difference. First operand has 473 places, 459 transitions, 6111 flow. Second operand 40 states and 2106 transitions. [2021-12-17 23:22:53,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 503 transitions, 7664 flow [2021-12-17 23:22:53,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 503 transitions, 7178 flow, removed 117 selfloop flow, removed 39 redundant places. [2021-12-17 23:22:53,339 INFO L242 Difference]: Finished difference. Result has 453 places, 463 transitions, 6041 flow [2021-12-17 23:22:53,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6041, PETRI_PLACES=453, PETRI_TRANSITIONS=463} [2021-12-17 23:22:53,340 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 365 predicate places. [2021-12-17 23:22:53,340 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 463 transitions, 6041 flow [2021-12-17 23:22:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:53,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:53,341 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] [2021-12-17 23:22:53,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-12-17 23:22:53,341 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash -853925842, now seen corresponding path program 113 times [2021-12-17 23:22:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632319444] [2021-12-17 23:22:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:53,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:53,674 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 23:22:53,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632319444] [2021-12-17 23:22:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632319444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:53,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:53,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361597781] [2021-12-17 23:22:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:53,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:53,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:53,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:53,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:53,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 463 transitions, 6041 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:53,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:53,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:53,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:55,189 INFO L129 PetriNetUnfolder]: 366/1178 cut-off events. [2021-12-17 23:22:55,190 INFO L130 PetriNetUnfolder]: For 21289/21289 co-relation queries the response was YES. [2021-12-17 23:22:55,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8833 conditions, 1178 events. 366/1178 cut-off events. For 21289/21289 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7557 event pairs, 50 based on Foata normal form. 1/1178 useless extension candidates. Maximal degree in co-relation 8677. Up to 782 conditions per place. [2021-12-17 23:22:55,208 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 328 selfloop transitions, 112 changer transitions 26/505 dead transitions. [2021-12-17 23:22:55,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 505 transitions, 7572 flow [2021-12-17 23:22:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:22:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 23:22:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2021-12-17 23:22:55,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-12-17 23:22:55,210 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2021-12-17 23:22:55,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2021-12-17 23:22:55,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:55,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2021-12-17 23:22:55,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 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 23:22:55,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:22:55,213 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:22:55,213 INFO L186 Difference]: Start difference. First operand has 453 places, 463 transitions, 6041 flow. Second operand 42 states and 2205 transitions. [2021-12-17 23:22:55,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 505 transitions, 7572 flow [2021-12-17 23:22:55,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 505 transitions, 7288 flow, removed 53 selfloop flow, removed 35 redundant places. [2021-12-17 23:22:55,367 INFO L242 Difference]: Finished difference. Result has 461 places, 465 transitions, 6162 flow [2021-12-17 23:22:55,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=6162, PETRI_PLACES=461, PETRI_TRANSITIONS=465} [2021-12-17 23:22:55,367 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 373 predicate places. [2021-12-17 23:22:55,367 INFO L470 AbstractCegarLoop]: Abstraction has has 461 places, 465 transitions, 6162 flow [2021-12-17 23:22:55,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:55,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:55,368 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] [2021-12-17 23:22:55,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-12-17 23:22:55,368 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1348813502, now seen corresponding path program 114 times [2021-12-17 23:22:55,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:55,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107709986] [2021-12-17 23:22:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:55,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:55,642 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 23:22:55,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:55,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107709986] [2021-12-17 23:22:55,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107709986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:55,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:55,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:55,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32363749] [2021-12-17 23:22:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:55,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:55,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:55,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:55,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:55,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 465 transitions, 6162 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:55,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:55,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:55,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:57,318 INFO L129 PetriNetUnfolder]: 360/1161 cut-off events. [2021-12-17 23:22:57,318 INFO L130 PetriNetUnfolder]: For 21150/21150 co-relation queries the response was YES. [2021-12-17 23:22:57,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 1161 events. 360/1161 cut-off events. For 21150/21150 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7408 event pairs, 49 based on Foata normal form. 1/1160 useless extension candidates. Maximal degree in co-relation 8593. Up to 744 conditions per place. [2021-12-17 23:22:57,335 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 310 selfloop transitions, 125 changer transitions 27/501 dead transitions. [2021-12-17 23:22:57,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 501 transitions, 7478 flow [2021-12-17 23:22:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:22:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:22:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1953 transitions. [2021-12-17 23:22:57,337 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5615296147211041 [2021-12-17 23:22:57,337 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1953 transitions. [2021-12-17 23:22:57,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1953 transitions. [2021-12-17 23:22:57,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:57,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1953 transitions. [2021-12-17 23:22:57,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.78378378378378) internal successors, (1953), 37 states have internal predecessors, (1953), 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 23:22:57,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:57,340 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:22:57,340 INFO L186 Difference]: Start difference. First operand has 461 places, 465 transitions, 6162 flow. Second operand 37 states and 1953 transitions. [2021-12-17 23:22:57,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 501 transitions, 7478 flow [2021-12-17 23:22:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 501 transitions, 7170 flow, removed 57 selfloop flow, removed 36 redundant places. [2021-12-17 23:22:57,491 INFO L242 Difference]: Finished difference. Result has 460 places, 457 transitions, 6131 flow [2021-12-17 23:22:57,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6131, PETRI_PLACES=460, PETRI_TRANSITIONS=457} [2021-12-17 23:22:57,491 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 372 predicate places. [2021-12-17 23:22:57,492 INFO L470 AbstractCegarLoop]: Abstraction has has 460 places, 457 transitions, 6131 flow [2021-12-17 23:22:57,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:57,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:57,492 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] [2021-12-17 23:22:57,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-12-17 23:22:57,492 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1471011062, now seen corresponding path program 115 times [2021-12-17 23:22:57,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067177235] [2021-12-17 23:22:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:57,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:57,780 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 23:22:57,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067177235] [2021-12-17 23:22:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067177235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:57,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:57,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:22:57,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754875679] [2021-12-17 23:22:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:22:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:22:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:22:57,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:57,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 457 transitions, 6131 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:57,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:57,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:57,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:22:59,332 INFO L129 PetriNetUnfolder]: 353/1159 cut-off events. [2021-12-17 23:22:59,333 INFO L130 PetriNetUnfolder]: For 20406/20406 co-relation queries the response was YES. [2021-12-17 23:22:59,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 1159 events. 353/1159 cut-off events. For 20406/20406 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7377 event pairs, 52 based on Foata normal form. 1/1158 useless extension candidates. Maximal degree in co-relation 8476. Up to 805 conditions per place. [2021-12-17 23:22:59,350 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 360 selfloop transitions, 64 changer transitions 19/482 dead transitions. [2021-12-17 23:22:59,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 482 transitions, 7202 flow [2021-12-17 23:22:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:22:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:22:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1679 transitions. [2021-12-17 23:22:59,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5581781914893617 [2021-12-17 23:22:59,352 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1679 transitions. [2021-12-17 23:22:59,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1679 transitions. [2021-12-17 23:22:59,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:22:59,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1679 transitions. [2021-12-17 23:22:59,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.46875) internal successors, (1679), 32 states have internal predecessors, (1679), 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 23:22:59,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:22:59,355 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:22:59,356 INFO L186 Difference]: Start difference. First operand has 460 places, 457 transitions, 6131 flow. Second operand 32 states and 1679 transitions. [2021-12-17 23:22:59,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 482 transitions, 7202 flow [2021-12-17 23:22:59,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 482 transitions, 6879 flow, removed 17 selfloop flow, removed 36 redundant places. [2021-12-17 23:22:59,497 INFO L242 Difference]: Finished difference. Result has 451 places, 454 transitions, 5947 flow [2021-12-17 23:22:59,498 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5947, PETRI_PLACES=451, PETRI_TRANSITIONS=454} [2021-12-17 23:22:59,498 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 363 predicate places. [2021-12-17 23:22:59,498 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 454 transitions, 5947 flow [2021-12-17 23:22:59,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:22:59,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:22:59,498 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] [2021-12-17 23:22:59,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-12-17 23:22:59,498 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:22:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:22:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 653070886, now seen corresponding path program 116 times [2021-12-17 23:22:59,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:22:59,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578205167] [2021-12-17 23:22:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:22:59,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:22:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:22:59,795 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 23:22:59,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:22:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578205167] [2021-12-17 23:22:59,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578205167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:22:59,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:22:59,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:22:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789938097] [2021-12-17 23:22:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:22:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:22:59,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:22:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:22:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:22:59,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:22:59,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 454 transitions, 5947 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:22:59,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:22:59,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:22:59,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:02,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:23:04,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:23:05,034 INFO L129 PetriNetUnfolder]: 354/1157 cut-off events. [2021-12-17 23:23:05,035 INFO L130 PetriNetUnfolder]: For 20073/20073 co-relation queries the response was YES. [2021-12-17 23:23:05,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 1157 events. 354/1157 cut-off events. For 20073/20073 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7391 event pairs, 52 based on Foata normal form. 1/1156 useless extension candidates. Maximal degree in co-relation 8423. Up to 712 conditions per place. [2021-12-17 23:23:05,052 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 306 selfloop transitions, 135 changer transitions 27/507 dead transitions. [2021-12-17 23:23:05,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 507 transitions, 7683 flow [2021-12-17 23:23:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:23:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:23:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1797 transitions. [2021-12-17 23:23:05,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622653316645807 [2021-12-17 23:23:05,054 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1797 transitions. [2021-12-17 23:23:05,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1797 transitions. [2021-12-17 23:23:05,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:05,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1797 transitions. [2021-12-17 23:23:05,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.85294117647059) internal successors, (1797), 34 states have internal predecessors, (1797), 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 23:23:05,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:05,058 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:05,058 INFO L186 Difference]: Start difference. First operand has 451 places, 454 transitions, 5947 flow. Second operand 34 states and 1797 transitions. [2021-12-17 23:23:05,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 507 transitions, 7683 flow [2021-12-17 23:23:05,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 507 transitions, 7467 flow, removed 18 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:05,205 INFO L242 Difference]: Finished difference. Result has 449 places, 462 transitions, 6222 flow [2021-12-17 23:23:05,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6222, PETRI_PLACES=449, PETRI_TRANSITIONS=462} [2021-12-17 23:23:05,206 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-12-17 23:23:05,206 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 462 transitions, 6222 flow [2021-12-17 23:23:05,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:05,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:05,207 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] [2021-12-17 23:23:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-12-17 23:23:05,207 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1523953962, now seen corresponding path program 117 times [2021-12-17 23:23:05,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901470366] [2021-12-17 23:23:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:05,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:05,543 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 23:23:05,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:05,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901470366] [2021-12-17 23:23:05,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901470366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:05,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:05,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:05,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689045233] [2021-12-17 23:23:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:05,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:05,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:05,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:05,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 462 transitions, 6222 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:05,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:05,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:05,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:07,143 INFO L129 PetriNetUnfolder]: 350/1108 cut-off events. [2021-12-17 23:23:07,143 INFO L130 PetriNetUnfolder]: For 20866/20866 co-relation queries the response was YES. [2021-12-17 23:23:07,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 1108 events. 350/1108 cut-off events. For 20866/20866 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6798 event pairs, 50 based on Foata normal form. 1/1107 useless extension candidates. Maximal degree in co-relation 8324. Up to 653 conditions per place. [2021-12-17 23:23:07,159 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 276 selfloop transitions, 170 changer transitions 18/503 dead transitions. [2021-12-17 23:23:07,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 503 transitions, 7852 flow [2021-12-17 23:23:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:23:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:23:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2050 transitions. [2021-12-17 23:23:07,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5591925804691762 [2021-12-17 23:23:07,161 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2050 transitions. [2021-12-17 23:23:07,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2050 transitions. [2021-12-17 23:23:07,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:07,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2050 transitions. [2021-12-17 23:23:07,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.56410256410256) internal successors, (2050), 39 states have internal predecessors, (2050), 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 23:23:07,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:23:07,164 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:23:07,164 INFO L186 Difference]: Start difference. First operand has 449 places, 462 transitions, 6222 flow. Second operand 39 states and 2050 transitions. [2021-12-17 23:23:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 503 transitions, 7852 flow [2021-12-17 23:23:07,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 503 transitions, 7520 flow, removed 74 selfloop flow, removed 30 redundant places. [2021-12-17 23:23:07,315 INFO L242 Difference]: Finished difference. Result has 459 places, 468 transitions, 6519 flow [2021-12-17 23:23:07,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6519, PETRI_PLACES=459, PETRI_TRANSITIONS=468} [2021-12-17 23:23:07,316 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-12-17 23:23:07,316 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 468 transitions, 6519 flow [2021-12-17 23:23:07,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:07,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:07,317 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] [2021-12-17 23:23:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-12-17 23:23:07,317 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1309354006, now seen corresponding path program 118 times [2021-12-17 23:23:07,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:07,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933045766] [2021-12-17 23:23:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:07,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:07,627 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 23:23:07,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:07,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933045766] [2021-12-17 23:23:07,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933045766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:07,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:07,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:07,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234248650] [2021-12-17 23:23:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:07,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:07,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:07,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:07,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 468 transitions, 6519 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:07,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:07,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:07,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:08,899 INFO L129 PetriNetUnfolder]: 348/1099 cut-off events. [2021-12-17 23:23:08,899 INFO L130 PetriNetUnfolder]: For 19845/19845 co-relation queries the response was YES. [2021-12-17 23:23:08,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8435 conditions, 1099 events. 348/1099 cut-off events. For 19845/19845 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6754 event pairs, 35 based on Foata normal form. 1/1099 useless extension candidates. Maximal degree in co-relation 8279. Up to 778 conditions per place. [2021-12-17 23:23:08,915 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 369 selfloop transitions, 69 changer transitions 17/494 dead transitions. [2021-12-17 23:23:08,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 494 transitions, 7704 flow [2021-12-17 23:23:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:23:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:23:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1878 transitions. [2021-12-17 23:23:08,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5549645390070922 [2021-12-17 23:23:08,917 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1878 transitions. [2021-12-17 23:23:08,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1878 transitions. [2021-12-17 23:23:08,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:08,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1878 transitions. [2021-12-17 23:23:08,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.166666666666664) internal successors, (1878), 36 states have internal predecessors, (1878), 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 23:23:08,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:08,920 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:08,920 INFO L186 Difference]: Start difference. First operand has 459 places, 468 transitions, 6519 flow. Second operand 36 states and 1878 transitions. [2021-12-17 23:23:08,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 494 transitions, 7704 flow [2021-12-17 23:23:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 494 transitions, 7312 flow, removed 90 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:09,073 INFO L242 Difference]: Finished difference. Result has 460 places, 467 transitions, 6349 flow [2021-12-17 23:23:09,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6349, PETRI_PLACES=460, PETRI_TRANSITIONS=467} [2021-12-17 23:23:09,073 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 372 predicate places. [2021-12-17 23:23:09,073 INFO L470 AbstractCegarLoop]: Abstraction has has 460 places, 467 transitions, 6349 flow [2021-12-17 23:23:09,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:09,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:09,074 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] [2021-12-17 23:23:09,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-12-17 23:23:09,074 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:09,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash 666344944, now seen corresponding path program 119 times [2021-12-17 23:23:09,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:09,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388219629] [2021-12-17 23:23:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:09,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:09,440 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 23:23:09,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:09,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388219629] [2021-12-17 23:23:09,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388219629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:09,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:09,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:09,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522265884] [2021-12-17 23:23:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:09,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:09,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:09,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:09,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:09,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 467 transitions, 6349 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:09,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:09,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:09,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:12,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:23:13,336 INFO L129 PetriNetUnfolder]: 343/1078 cut-off events. [2021-12-17 23:23:13,336 INFO L130 PetriNetUnfolder]: For 16451/16451 co-relation queries the response was YES. [2021-12-17 23:23:13,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8110 conditions, 1078 events. 343/1078 cut-off events. For 16451/16451 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6510 event pairs, 51 based on Foata normal form. 1/1077 useless extension candidates. Maximal degree in co-relation 7954. Up to 773 conditions per place. [2021-12-17 23:23:13,351 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 367 selfloop transitions, 51 changer transitions 27/484 dead transitions. [2021-12-17 23:23:13,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 484 transitions, 7327 flow [2021-12-17 23:23:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:23:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:23:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1722 transitions. [2021-12-17 23:23:13,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5551257253384912 [2021-12-17 23:23:13,353 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1722 transitions. [2021-12-17 23:23:13,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1722 transitions. [2021-12-17 23:23:13,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:13,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1722 transitions. [2021-12-17 23:23:13,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.18181818181818) internal successors, (1722), 33 states have internal predecessors, (1722), 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 23:23:13,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:23:13,356 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:23:13,356 INFO L186 Difference]: Start difference. First operand has 460 places, 467 transitions, 6349 flow. Second operand 33 states and 1722 transitions. [2021-12-17 23:23:13,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 484 transitions, 7327 flow [2021-12-17 23:23:13,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 484 transitions, 7052 flow, removed 50 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:13,508 INFO L242 Difference]: Finished difference. Result has 455 places, 448 transitions, 6067 flow [2021-12-17 23:23:13,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6082, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6067, PETRI_PLACES=455, PETRI_TRANSITIONS=448} [2021-12-17 23:23:13,508 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 367 predicate places. [2021-12-17 23:23:13,508 INFO L470 AbstractCegarLoop]: Abstraction has has 455 places, 448 transitions, 6067 flow [2021-12-17 23:23:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:13,508 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:13,508 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] [2021-12-17 23:23:13,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-12-17 23:23:13,509 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1321486236, now seen corresponding path program 120 times [2021-12-17 23:23:13,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267724890] [2021-12-17 23:23:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:13,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:13,820 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 23:23:13,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267724890] [2021-12-17 23:23:13,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267724890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:13,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:13,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:13,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79647352] [2021-12-17 23:23:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:13,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:13,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:13,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 448 transitions, 6067 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:13,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:13,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:13,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:15,364 INFO L129 PetriNetUnfolder]: 346/1084 cut-off events. [2021-12-17 23:23:15,365 INFO L130 PetriNetUnfolder]: For 16667/16667 co-relation queries the response was YES. [2021-12-17 23:23:15,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8126 conditions, 1084 events. 346/1084 cut-off events. For 16667/16667 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6594 event pairs, 39 based on Foata normal form. 1/1083 useless extension candidates. Maximal degree in co-relation 7972. Up to 673 conditions per place. [2021-12-17 23:23:15,380 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 302 selfloop transitions, 136 changer transitions 17/494 dead transitions. [2021-12-17 23:23:15,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 494 transitions, 7699 flow [2021-12-17 23:23:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1995 transitions. [2021-12-17 23:23:15,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-12-17 23:23:15,382 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1995 transitions. [2021-12-17 23:23:15,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1995 transitions. [2021-12-17 23:23:15,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:15,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1995 transitions. [2021-12-17 23:23:15,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.5) internal successors, (1995), 38 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 23:23:15,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:15,385 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:15,385 INFO L186 Difference]: Start difference. First operand has 455 places, 448 transitions, 6067 flow. Second operand 38 states and 1995 transitions. [2021-12-17 23:23:15,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 494 transitions, 7699 flow [2021-12-17 23:23:15,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 494 transitions, 7217 flow, removed 99 selfloop flow, removed 31 redundant places. [2021-12-17 23:23:15,502 INFO L242 Difference]: Finished difference. Result has 434 places, 456 transitions, 6142 flow [2021-12-17 23:23:15,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6142, PETRI_PLACES=434, PETRI_TRANSITIONS=456} [2021-12-17 23:23:15,503 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 346 predicate places. [2021-12-17 23:23:15,503 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 456 transitions, 6142 flow [2021-12-17 23:23:15,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:15,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:15,503 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] [2021-12-17 23:23:15,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-12-17 23:23:15,503 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2082556044, now seen corresponding path program 121 times [2021-12-17 23:23:15,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446478957] [2021-12-17 23:23:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:15,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:15,795 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 23:23:15,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446478957] [2021-12-17 23:23:15,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446478957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:15,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:15,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:15,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949736816] [2021-12-17 23:23:15,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:15,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:15,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:15,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:15,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 456 transitions, 6142 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:15,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:15,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:15,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:17,078 INFO L129 PetriNetUnfolder]: 348/1100 cut-off events. [2021-12-17 23:23:17,079 INFO L130 PetriNetUnfolder]: For 14875/14875 co-relation queries the response was YES. [2021-12-17 23:23:17,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 1100 events. 348/1100 cut-off events. For 14875/14875 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6730 event pairs, 42 based on Foata normal form. 1/1099 useless extension candidates. Maximal degree in co-relation 7745. Up to 692 conditions per place. [2021-12-17 23:23:17,093 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 309 selfloop transitions, 139 changer transitions 18/505 dead transitions. [2021-12-17 23:23:17,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 505 transitions, 7837 flow [2021-12-17 23:23:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:23:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:23:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1797 transitions. [2021-12-17 23:23:17,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622653316645807 [2021-12-17 23:23:17,095 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1797 transitions. [2021-12-17 23:23:17,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1797 transitions. [2021-12-17 23:23:17,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:17,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1797 transitions. [2021-12-17 23:23:17,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.85294117647059) internal successors, (1797), 34 states have internal predecessors, (1797), 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 23:23:17,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:17,099 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:17,099 INFO L186 Difference]: Start difference. First operand has 434 places, 456 transitions, 6142 flow. Second operand 34 states and 1797 transitions. [2021-12-17 23:23:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 505 transitions, 7837 flow [2021-12-17 23:23:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 505 transitions, 7525 flow, removed 53 selfloop flow, removed 33 redundant places. [2021-12-17 23:23:17,230 INFO L242 Difference]: Finished difference. Result has 436 places, 470 transitions, 6533 flow [2021-12-17 23:23:17,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6533, PETRI_PLACES=436, PETRI_TRANSITIONS=470} [2021-12-17 23:23:17,231 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 348 predicate places. [2021-12-17 23:23:17,231 INFO L470 AbstractCegarLoop]: Abstraction has has 436 places, 470 transitions, 6533 flow [2021-12-17 23:23:17,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:17,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:17,232 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] [2021-12-17 23:23:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-12-17 23:23:17,232 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -52751034, now seen corresponding path program 122 times [2021-12-17 23:23:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994759495] [2021-12-17 23:23:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:17,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:17,529 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 23:23:17,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994759495] [2021-12-17 23:23:17,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994759495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:17,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:17,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:17,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114272917] [2021-12-17 23:23:17,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:17,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:17,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:17,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:17,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 470 transitions, 6533 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:17,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:17,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:17,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:19,048 INFO L129 PetriNetUnfolder]: 353/1105 cut-off events. [2021-12-17 23:23:19,048 INFO L130 PetriNetUnfolder]: For 14710/14710 co-relation queries the response was YES. [2021-12-17 23:23:19,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8042 conditions, 1105 events. 353/1105 cut-off events. For 14710/14710 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6740 event pairs, 55 based on Foata normal form. 1/1104 useless extension candidates. Maximal degree in co-relation 7894. Up to 738 conditions per place. [2021-12-17 23:23:19,063 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 348 selfloop transitions, 98 changer transitions 22/507 dead transitions. [2021-12-17 23:23:19,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 507 transitions, 7923 flow [2021-12-17 23:23:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:23:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:23:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1896 transitions. [2021-12-17 23:23:19,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2021-12-17 23:23:19,065 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1896 transitions. [2021-12-17 23:23:19,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1896 transitions. [2021-12-17 23:23:19,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:19,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1896 transitions. [2021-12-17 23:23:19,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.666666666666664) internal successors, (1896), 36 states have internal predecessors, (1896), 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 23:23:19,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:19,068 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:19,068 INFO L186 Difference]: Start difference. First operand has 436 places, 470 transitions, 6533 flow. Second operand 36 states and 1896 transitions. [2021-12-17 23:23:19,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 507 transitions, 7923 flow [2021-12-17 23:23:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 507 transitions, 7587 flow, removed 88 selfloop flow, removed 28 redundant places. [2021-12-17 23:23:19,197 INFO L242 Difference]: Finished difference. Result has 445 places, 471 transitions, 6520 flow [2021-12-17 23:23:19,197 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6520, PETRI_PLACES=445, PETRI_TRANSITIONS=471} [2021-12-17 23:23:19,198 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 357 predicate places. [2021-12-17 23:23:19,198 INFO L470 AbstractCegarLoop]: Abstraction has has 445 places, 471 transitions, 6520 flow [2021-12-17 23:23:19,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:19,198 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:19,198 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] [2021-12-17 23:23:19,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-12-17 23:23:19,198 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1146939014, now seen corresponding path program 123 times [2021-12-17 23:23:19,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884697203] [2021-12-17 23:23:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:19,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:19,472 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 23:23:19,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:19,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884697203] [2021-12-17 23:23:19,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884697203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:19,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:19,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:19,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103316266] [2021-12-17 23:23:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:19,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:19,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:19,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:19,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 471 transitions, 6520 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:19,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:19,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:19,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:21,057 INFO L129 PetriNetUnfolder]: 351/1103 cut-off events. [2021-12-17 23:23:21,057 INFO L130 PetriNetUnfolder]: For 13827/13827 co-relation queries the response was YES. [2021-12-17 23:23:21,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8022 conditions, 1103 events. 351/1103 cut-off events. For 13827/13827 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6734 event pairs, 55 based on Foata normal form. 1/1102 useless extension candidates. Maximal degree in co-relation 7871. Up to 730 conditions per place. [2021-12-17 23:23:21,069 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 337 selfloop transitions, 107 changer transitions 22/505 dead transitions. [2021-12-17 23:23:21,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 505 transitions, 7872 flow [2021-12-17 23:23:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1996 transitions. [2021-12-17 23:23:21,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587905935050392 [2021-12-17 23:23:21,070 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1996 transitions. [2021-12-17 23:23:21,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1996 transitions. [2021-12-17 23:23:21,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:21,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1996 transitions. [2021-12-17 23:23:21,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.526315789473685) internal successors, (1996), 38 states have internal predecessors, (1996), 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 23:23:21,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:21,074 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:21,074 INFO L186 Difference]: Start difference. First operand has 445 places, 471 transitions, 6520 flow. Second operand 38 states and 1996 transitions. [2021-12-17 23:23:21,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 505 transitions, 7872 flow [2021-12-17 23:23:21,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 505 transitions, 7617 flow, removed 39 selfloop flow, removed 32 redundant places. [2021-12-17 23:23:21,208 INFO L242 Difference]: Finished difference. Result has 449 places, 469 transitions, 6566 flow [2021-12-17 23:23:21,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6566, PETRI_PLACES=449, PETRI_TRANSITIONS=469} [2021-12-17 23:23:21,208 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-12-17 23:23:21,208 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 469 transitions, 6566 flow [2021-12-17 23:23:21,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:21,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:21,209 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] [2021-12-17 23:23:21,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-12-17 23:23:21,209 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 578587614, now seen corresponding path program 124 times [2021-12-17 23:23:21,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:21,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335495957] [2021-12-17 23:23:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:21,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:21,500 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 23:23:21,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:21,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335495957] [2021-12-17 23:23:21,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335495957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:21,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:21,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:21,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239138937] [2021-12-17 23:23:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:21,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:21,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:21,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:21,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 469 transitions, 6566 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:21,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:21,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:21,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:22,947 INFO L129 PetriNetUnfolder]: 349/1094 cut-off events. [2021-12-17 23:23:22,947 INFO L130 PetriNetUnfolder]: For 14407/14407 co-relation queries the response was YES. [2021-12-17 23:23:22,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8101 conditions, 1094 events. 349/1094 cut-off events. For 14407/14407 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6677 event pairs, 57 based on Foata normal form. 1/1093 useless extension candidates. Maximal degree in co-relation 7949. Up to 640 conditions per place. [2021-12-17 23:23:22,963 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 269 selfloop transitions, 178 changer transitions 19/505 dead transitions. [2021-12-17 23:23:22,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 505 transitions, 7975 flow [2021-12-17 23:23:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:23:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:23:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2101 transitions. [2021-12-17 23:23:22,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587765957446809 [2021-12-17 23:23:22,965 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2101 transitions. [2021-12-17 23:23:22,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2101 transitions. [2021-12-17 23:23:22,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:22,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2101 transitions. [2021-12-17 23:23:22,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.525) internal successors, (2101), 40 states have internal predecessors, (2101), 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 23:23:22,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:23:22,968 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:23:22,968 INFO L186 Difference]: Start difference. First operand has 449 places, 469 transitions, 6566 flow. Second operand 40 states and 2101 transitions. [2021-12-17 23:23:22,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 505 transitions, 7975 flow [2021-12-17 23:23:23,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 505 transitions, 7661 flow, removed 47 selfloop flow, removed 36 redundant places. [2021-12-17 23:23:23,103 INFO L242 Difference]: Finished difference. Result has 451 places, 471 transitions, 6791 flow [2021-12-17 23:23:23,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6290, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6791, PETRI_PLACES=451, PETRI_TRANSITIONS=471} [2021-12-17 23:23:23,104 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 363 predicate places. [2021-12-17 23:23:23,104 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 471 transitions, 6791 flow [2021-12-17 23:23:23,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:23,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:23,104 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] [2021-12-17 23:23:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-12-17 23:23:23,105 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1953906706, now seen corresponding path program 125 times [2021-12-17 23:23:23,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461421478] [2021-12-17 23:23:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:23,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:23,386 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 23:23:23,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461421478] [2021-12-17 23:23:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461421478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:23,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:23,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:23,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864916336] [2021-12-17 23:23:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:23,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:23,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:23,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:23,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 471 transitions, 6791 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:23,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:23,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:23,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:24,673 INFO L129 PetriNetUnfolder]: 347/1096 cut-off events. [2021-12-17 23:23:24,674 INFO L130 PetriNetUnfolder]: For 14481/14481 co-relation queries the response was YES. [2021-12-17 23:23:24,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1096 events. 347/1096 cut-off events. For 14481/14481 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6720 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 8030. Up to 683 conditions per place. [2021-12-17 23:23:24,721 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 306 selfloop transitions, 142 changer transitions 23/510 dead transitions. [2021-12-17 23:23:24,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 510 transitions, 8228 flow [2021-12-17 23:23:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:23:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:23:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1949 transitions. [2021-12-17 23:23:24,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603795284646349 [2021-12-17 23:23:24,722 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1949 transitions. [2021-12-17 23:23:24,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1949 transitions. [2021-12-17 23:23:24,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:24,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1949 transitions. [2021-12-17 23:23:24,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.67567567567568) internal successors, (1949), 37 states have internal predecessors, (1949), 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 23:23:24,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:23:24,726 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:23:24,726 INFO L186 Difference]: Start difference. First operand has 451 places, 471 transitions, 6791 flow. Second operand 37 states and 1949 transitions. [2021-12-17 23:23:24,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 510 transitions, 8228 flow [2021-12-17 23:23:24,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 510 transitions, 7876 flow, removed 38 selfloop flow, removed 36 redundant places. [2021-12-17 23:23:24,860 INFO L242 Difference]: Finished difference. Result has 453 places, 472 transitions, 6874 flow [2021-12-17 23:23:24,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6874, PETRI_PLACES=453, PETRI_TRANSITIONS=472} [2021-12-17 23:23:24,860 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 365 predicate places. [2021-12-17 23:23:24,860 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 472 transitions, 6874 flow [2021-12-17 23:23:24,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:24,861 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:24,861 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] [2021-12-17 23:23:24,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-12-17 23:23:24,861 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1630047988, now seen corresponding path program 126 times [2021-12-17 23:23:24,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:24,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172987589] [2021-12-17 23:23:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:24,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:25,165 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 23:23:25,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172987589] [2021-12-17 23:23:25,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172987589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:25,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:25,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:25,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895429647] [2021-12-17 23:23:25,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:25,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:25,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:25,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:25,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 472 transitions, 6874 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:25,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:25,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:25,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:27,148 INFO L129 PetriNetUnfolder]: 345/1089 cut-off events. [2021-12-17 23:23:27,148 INFO L130 PetriNetUnfolder]: For 13961/13961 co-relation queries the response was YES. [2021-12-17 23:23:27,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8138 conditions, 1089 events. 345/1089 cut-off events. For 13961/13961 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6632 event pairs, 57 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 7986. Up to 733 conditions per place. [2021-12-17 23:23:27,165 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 347 selfloop transitions, 99 changer transitions 21/506 dead transitions. [2021-12-17 23:23:27,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 506 transitions, 8219 flow [2021-12-17 23:23:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:23:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:23:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2040 transitions. [2021-12-17 23:23:27,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5564648117839607 [2021-12-17 23:23:27,166 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2040 transitions. [2021-12-17 23:23:27,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2040 transitions. [2021-12-17 23:23:27,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:27,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2040 transitions. [2021-12-17 23:23:27,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.30769230769231) internal successors, (2040), 39 states have internal predecessors, (2040), 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 23:23:27,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:23:27,170 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:23:27,170 INFO L186 Difference]: Start difference. First operand has 453 places, 472 transitions, 6874 flow. Second operand 39 states and 2040 transitions. [2021-12-17 23:23:27,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 506 transitions, 8219 flow [2021-12-17 23:23:27,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 506 transitions, 7847 flow, removed 58 selfloop flow, removed 32 redundant places. [2021-12-17 23:23:27,320 INFO L242 Difference]: Finished difference. Result has 461 places, 473 transitions, 6818 flow [2021-12-17 23:23:27,320 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6818, PETRI_PLACES=461, PETRI_TRANSITIONS=473} [2021-12-17 23:23:27,321 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 373 predicate places. [2021-12-17 23:23:27,321 INFO L470 AbstractCegarLoop]: Abstraction has has 461 places, 473 transitions, 6818 flow [2021-12-17 23:23:27,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:27,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:27,322 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] [2021-12-17 23:23:27,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-12-17 23:23:27,322 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1000060818, now seen corresponding path program 127 times [2021-12-17 23:23:27,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:27,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811440083] [2021-12-17 23:23:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:27,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:27,690 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 23:23:27,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:27,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811440083] [2021-12-17 23:23:27,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811440083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:27,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:27,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:27,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270521447] [2021-12-17 23:23:27,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:27,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:27,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:27,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:27,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 473 transitions, 6818 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:27,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:27,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:27,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:29,272 INFO L129 PetriNetUnfolder]: 342/1086 cut-off events. [2021-12-17 23:23:29,273 INFO L130 PetriNetUnfolder]: For 13908/13908 co-relation queries the response was YES. [2021-12-17 23:23:29,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8114 conditions, 1086 events. 342/1086 cut-off events. For 13908/13908 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6638 event pairs, 57 based on Foata normal form. 1/1085 useless extension candidates. Maximal degree in co-relation 7959. Up to 728 conditions per place. [2021-12-17 23:23:29,322 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 346 selfloop transitions, 89 changer transitions 30/504 dead transitions. [2021-12-17 23:23:29,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 504 transitions, 8124 flow [2021-12-17 23:23:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:23:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:23:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2021-12-17 23:23:29,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5594493116395495 [2021-12-17 23:23:29,324 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2021-12-17 23:23:29,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2021-12-17 23:23:29,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:29,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2021-12-17 23:23:29,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 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 23:23:29,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:29,327 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:29,327 INFO L186 Difference]: Start difference. First operand has 461 places, 473 transitions, 6818 flow. Second operand 34 states and 1788 transitions. [2021-12-17 23:23:29,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 504 transitions, 8124 flow [2021-12-17 23:23:29,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 504 transitions, 7693 flow, removed 118 selfloop flow, removed 35 redundant places. [2021-12-17 23:23:29,456 INFO L242 Difference]: Finished difference. Result has 460 places, 463 transitions, 6464 flow [2021-12-17 23:23:29,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6479, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6464, PETRI_PLACES=460, PETRI_TRANSITIONS=463} [2021-12-17 23:23:29,456 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 372 predicate places. [2021-12-17 23:23:29,456 INFO L470 AbstractCegarLoop]: Abstraction has has 460 places, 463 transitions, 6464 flow [2021-12-17 23:23:29,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:29,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:29,456 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] [2021-12-17 23:23:29,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-12-17 23:23:29,457 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash -380085292, now seen corresponding path program 128 times [2021-12-17 23:23:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:29,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543812229] [2021-12-17 23:23:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:29,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:29,760 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 23:23:29,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543812229] [2021-12-17 23:23:29,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543812229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:29,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:29,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:29,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766427071] [2021-12-17 23:23:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:29,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:29,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:29,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:29,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 463 transitions, 6464 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:29,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:29,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:29,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:32,185 INFO L129 PetriNetUnfolder]: 335/1067 cut-off events. [2021-12-17 23:23:32,186 INFO L130 PetriNetUnfolder]: For 13374/13374 co-relation queries the response was YES. [2021-12-17 23:23:32,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 1067 events. 335/1067 cut-off events. For 13374/13374 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6482 event pairs, 57 based on Foata normal form. 1/1066 useless extension candidates. Maximal degree in co-relation 7685. Up to 649 conditions per place. [2021-12-17 23:23:32,201 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 287 selfloop transitions, 117 changer transitions 51/494 dead transitions. [2021-12-17 23:23:32,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 494 transitions, 7702 flow [2021-12-17 23:23:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1997 transitions. [2021-12-17 23:23:32,203 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5590705487122061 [2021-12-17 23:23:32,203 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1997 transitions. [2021-12-17 23:23:32,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1997 transitions. [2021-12-17 23:23:32,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:32,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1997 transitions. [2021-12-17 23:23:32,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.55263157894737) internal successors, (1997), 38 states have internal predecessors, (1997), 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 23:23:32,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:32,207 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:32,207 INFO L186 Difference]: Start difference. First operand has 460 places, 463 transitions, 6464 flow. Second operand 38 states and 1997 transitions. [2021-12-17 23:23:32,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 494 transitions, 7702 flow [2021-12-17 23:23:32,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 494 transitions, 7397 flow, removed 41 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:32,334 INFO L242 Difference]: Finished difference. Result has 465 places, 428 transitions, 5878 flow [2021-12-17 23:23:32,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5878, PETRI_PLACES=465, PETRI_TRANSITIONS=428} [2021-12-17 23:23:32,334 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 377 predicate places. [2021-12-17 23:23:32,335 INFO L470 AbstractCegarLoop]: Abstraction has has 465 places, 428 transitions, 5878 flow [2021-12-17 23:23:32,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:32,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:32,335 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] [2021-12-17 23:23:32,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-12-17 23:23:32,335 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1081134460, now seen corresponding path program 129 times [2021-12-17 23:23:32,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203047943] [2021-12-17 23:23:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:32,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:32,632 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 23:23:32,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203047943] [2021-12-17 23:23:32,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203047943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:32,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:32,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:32,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161442302] [2021-12-17 23:23:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:32,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:32,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:32,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 428 transitions, 5878 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:32,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:32,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:32,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:34,090 INFO L129 PetriNetUnfolder]: 317/1020 cut-off events. [2021-12-17 23:23:34,091 INFO L130 PetriNetUnfolder]: For 13972/13972 co-relation queries the response was YES. [2021-12-17 23:23:34,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7506 conditions, 1020 events. 317/1020 cut-off events. For 13972/13972 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6106 event pairs, 41 based on Foata normal form. 1/1019 useless extension candidates. Maximal degree in co-relation 7347. Up to 628 conditions per place. [2021-12-17 23:23:34,107 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 268 selfloop transitions, 139 changer transitions 19/465 dead transitions. [2021-12-17 23:23:34,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 465 transitions, 7182 flow [2021-12-17 23:23:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:23:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:23:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1899 transitions. [2021-12-17 23:23:34,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5611702127659575 [2021-12-17 23:23:34,108 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1899 transitions. [2021-12-17 23:23:34,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1899 transitions. [2021-12-17 23:23:34,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:34,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1899 transitions. [2021-12-17 23:23:34,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.75) internal successors, (1899), 36 states have internal predecessors, (1899), 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 23:23:34,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:34,112 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:34,112 INFO L186 Difference]: Start difference. First operand has 465 places, 428 transitions, 5878 flow. Second operand 36 states and 1899 transitions. [2021-12-17 23:23:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 465 transitions, 7182 flow [2021-12-17 23:23:34,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 465 transitions, 6615 flow, removed 126 selfloop flow, removed 48 redundant places. [2021-12-17 23:23:34,260 INFO L242 Difference]: Finished difference. Result has 448 places, 432 transitions, 5792 flow [2021-12-17 23:23:34,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5365, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5792, PETRI_PLACES=448, PETRI_TRANSITIONS=432} [2021-12-17 23:23:34,261 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 360 predicate places. [2021-12-17 23:23:34,261 INFO L470 AbstractCegarLoop]: Abstraction has has 448 places, 432 transitions, 5792 flow [2021-12-17 23:23:34,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:34,261 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:34,262 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] [2021-12-17 23:23:34,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-12-17 23:23:34,262 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash -126671206, now seen corresponding path program 130 times [2021-12-17 23:23:34,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532753508] [2021-12-17 23:23:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:34,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:34,592 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 23:23:34,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532753508] [2021-12-17 23:23:34,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532753508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:34,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:34,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:34,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117225729] [2021-12-17 23:23:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:34,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:34,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 432 transitions, 5792 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:34,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:34,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:34,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:36,500 INFO L129 PetriNetUnfolder]: 315/1009 cut-off events. [2021-12-17 23:23:36,501 INFO L130 PetriNetUnfolder]: For 13483/13483 co-relation queries the response was YES. [2021-12-17 23:23:36,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7351 conditions, 1009 events. 315/1009 cut-off events. For 13483/13483 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6020 event pairs, 41 based on Foata normal form. 1/1008 useless extension candidates. Maximal degree in co-relation 7200. Up to 680 conditions per place. [2021-12-17 23:23:36,515 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 304 selfloop transitions, 101 changer transitions 17/461 dead transitions. [2021-12-17 23:23:36,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 461 transitions, 6964 flow [2021-12-17 23:23:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:23:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:23:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2140 transitions. [2021-12-17 23:23:36,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5552672548002076 [2021-12-17 23:23:36,517 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2140 transitions. [2021-12-17 23:23:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2140 transitions. [2021-12-17 23:23:36,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:36,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2140 transitions. [2021-12-17 23:23:36,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.19512195121951) internal successors, (2140), 41 states have internal predecessors, (2140), 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 23:23:36,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:23:36,520 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:23:36,520 INFO L186 Difference]: Start difference. First operand has 448 places, 432 transitions, 5792 flow. Second operand 41 states and 2140 transitions. [2021-12-17 23:23:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 461 transitions, 6964 flow [2021-12-17 23:23:36,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 461 transitions, 6655 flow, removed 55 selfloop flow, removed 28 redundant places. [2021-12-17 23:23:36,646 INFO L242 Difference]: Finished difference. Result has 461 places, 432 transitions, 5790 flow [2021-12-17 23:23:36,646 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5790, PETRI_PLACES=461, PETRI_TRANSITIONS=432} [2021-12-17 23:23:36,647 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 373 predicate places. [2021-12-17 23:23:36,647 INFO L470 AbstractCegarLoop]: Abstraction has has 461 places, 432 transitions, 5790 flow [2021-12-17 23:23:36,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:36,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:36,647 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] [2021-12-17 23:23:36,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-12-17 23:23:36,647 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash -417365864, now seen corresponding path program 131 times [2021-12-17 23:23:36,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:36,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777176827] [2021-12-17 23:23:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:36,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:36,974 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 23:23:36,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777176827] [2021-12-17 23:23:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777176827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:36,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:36,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264262841] [2021-12-17 23:23:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:36,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:36,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:36,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:36,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 432 transitions, 5790 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:36,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:36,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:36,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:38,570 INFO L129 PetriNetUnfolder]: 310/994 cut-off events. [2021-12-17 23:23:38,570 INFO L130 PetriNetUnfolder]: For 13364/13364 co-relation queries the response was YES. [2021-12-17 23:23:38,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7251 conditions, 994 events. 310/994 cut-off events. For 13364/13364 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5884 event pairs, 42 based on Foata normal form. 1/993 useless extension candidates. Maximal degree in co-relation 7097. Up to 671 conditions per place. [2021-12-17 23:23:38,585 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 302 selfloop transitions, 75 changer transitions 35/451 dead transitions. [2021-12-17 23:23:38,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 451 transitions, 6733 flow [2021-12-17 23:23:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1984 transitions. [2021-12-17 23:23:38,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.555431131019037 [2021-12-17 23:23:38,587 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1984 transitions. [2021-12-17 23:23:38,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1984 transitions. [2021-12-17 23:23:38,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:38,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1984 transitions. [2021-12-17 23:23:38,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.21052631578947) internal successors, (1984), 38 states have internal predecessors, (1984), 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 23:23:38,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:38,590 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:38,590 INFO L186 Difference]: Start difference. First operand has 461 places, 432 transitions, 5790 flow. Second operand 38 states and 1984 transitions. [2021-12-17 23:23:38,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 451 transitions, 6733 flow [2021-12-17 23:23:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 451 transitions, 6412 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-12-17 23:23:38,743 INFO L242 Difference]: Finished difference. Result has 458 places, 405 transitions, 5336 flow [2021-12-17 23:23:38,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5479, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5336, PETRI_PLACES=458, PETRI_TRANSITIONS=405} [2021-12-17 23:23:38,743 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 370 predicate places. [2021-12-17 23:23:38,743 INFO L470 AbstractCegarLoop]: Abstraction has has 458 places, 405 transitions, 5336 flow [2021-12-17 23:23:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:38,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:38,744 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] [2021-12-17 23:23:38,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-12-17 23:23:38,744 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash -146116334, now seen corresponding path program 132 times [2021-12-17 23:23:38,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:38,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887516959] [2021-12-17 23:23:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:38,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:39,024 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 23:23:39,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:39,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887516959] [2021-12-17 23:23:39,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887516959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:39,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:39,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:39,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955401754] [2021-12-17 23:23:39,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:39,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:39,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:39,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:39,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 405 transitions, 5336 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:39,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:39,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:39,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:40,266 INFO L129 PetriNetUnfolder]: 302/951 cut-off events. [2021-12-17 23:23:40,266 INFO L130 PetriNetUnfolder]: For 11468/11468 co-relation queries the response was YES. [2021-12-17 23:23:40,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6900 conditions, 951 events. 302/951 cut-off events. For 11468/11468 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5451 event pairs, 56 based on Foata normal form. 1/951 useless extension candidates. Maximal degree in co-relation 6747. Up to 629 conditions per place. [2021-12-17 23:23:40,280 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 276 selfloop transitions, 91 changer transitions 24/430 dead transitions. [2021-12-17 23:23:40,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 430 transitions, 6261 flow [2021-12-17 23:23:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:23:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:23:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1888 transitions. [2021-12-17 23:23:40,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2021-12-17 23:23:40,281 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1888 transitions. [2021-12-17 23:23:40,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1888 transitions. [2021-12-17 23:23:40,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:40,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1888 transitions. [2021-12-17 23:23:40,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.44444444444444) internal successors, (1888), 36 states have internal predecessors, (1888), 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 23:23:40,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:40,285 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:23:40,285 INFO L186 Difference]: Start difference. First operand has 458 places, 405 transitions, 5336 flow. Second operand 36 states and 1888 transitions. [2021-12-17 23:23:40,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 430 transitions, 6261 flow [2021-12-17 23:23:40,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 430 transitions, 5883 flow, removed 20 selfloop flow, removed 46 redundant places. [2021-12-17 23:23:40,391 INFO L242 Difference]: Finished difference. Result has 421 places, 391 transitions, 4956 flow [2021-12-17 23:23:40,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4966, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4956, PETRI_PLACES=421, PETRI_TRANSITIONS=391} [2021-12-17 23:23:40,392 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 333 predicate places. [2021-12-17 23:23:40,392 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 391 transitions, 4956 flow [2021-12-17 23:23:40,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:40,392 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:40,392 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] [2021-12-17 23:23:40,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-12-17 23:23:40,392 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1816688844, now seen corresponding path program 133 times [2021-12-17 23:23:40,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:40,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578634620] [2021-12-17 23:23:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:40,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:40,680 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 23:23:40,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:40,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578634620] [2021-12-17 23:23:40,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578634620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:40,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:40,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:40,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297334060] [2021-12-17 23:23:40,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:40,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:40,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:40,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:40,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 391 transitions, 4956 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:40,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:40,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:40,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:41,766 INFO L129 PetriNetUnfolder]: 298/935 cut-off events. [2021-12-17 23:23:41,766 INFO L130 PetriNetUnfolder]: For 10279/10279 co-relation queries the response was YES. [2021-12-17 23:23:41,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6534 conditions, 935 events. 298/935 cut-off events. For 10279/10279 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5274 event pairs, 57 based on Foata normal form. 1/934 useless extension candidates. Maximal degree in co-relation 6392. Up to 614 conditions per place. [2021-12-17 23:23:41,779 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 260 selfloop transitions, 60 changer transitions 56/415 dead transitions. [2021-12-17 23:23:41,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 415 transitions, 5846 flow [2021-12-17 23:23:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:23:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:23:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1786 transitions. [2021-12-17 23:23:41,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2021-12-17 23:23:41,781 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1786 transitions. [2021-12-17 23:23:41,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1786 transitions. [2021-12-17 23:23:41,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:41,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1786 transitions. [2021-12-17 23:23:41,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.529411764705884) internal successors, (1786), 34 states have internal predecessors, (1786), 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 23:23:41,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:41,785 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:41,785 INFO L186 Difference]: Start difference. First operand has 421 places, 391 transitions, 4956 flow. Second operand 34 states and 1786 transitions. [2021-12-17 23:23:41,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 415 transitions, 5846 flow [2021-12-17 23:23:41,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 415 transitions, 5504 flow, removed 24 selfloop flow, removed 37 redundant places. [2021-12-17 23:23:41,878 INFO L242 Difference]: Finished difference. Result has 409 places, 350 transitions, 4176 flow [2021-12-17 23:23:41,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4176, PETRI_PLACES=409, PETRI_TRANSITIONS=350} [2021-12-17 23:23:41,878 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 321 predicate places. [2021-12-17 23:23:41,878 INFO L470 AbstractCegarLoop]: Abstraction has has 409 places, 350 transitions, 4176 flow [2021-12-17 23:23:41,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:41,878 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:41,878 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] [2021-12-17 23:23:41,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-12-17 23:23:41,879 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1452873562, now seen corresponding path program 134 times [2021-12-17 23:23:41,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:41,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078985096] [2021-12-17 23:23:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:41,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:42,182 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 23:23:42,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078985096] [2021-12-17 23:23:42,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078985096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:42,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:42,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:42,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917031315] [2021-12-17 23:23:42,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:42,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:42,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:42,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:42,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 350 transitions, 4176 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:42,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:42,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:42,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:43,794 INFO L129 PetriNetUnfolder]: 290/889 cut-off events. [2021-12-17 23:23:43,794 INFO L130 PetriNetUnfolder]: For 9547/9547 co-relation queries the response was YES. [2021-12-17 23:23:43,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6052 conditions, 889 events. 290/889 cut-off events. For 9547/9547 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4834 event pairs, 56 based on Foata normal form. 1/888 useless extension candidates. Maximal degree in co-relation 5914. Up to 564 conditions per place. [2021-12-17 23:23:43,806 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 218 selfloop transitions, 113 changer transitions 17/387 dead transitions. [2021-12-17 23:23:43,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 387 transitions, 5208 flow [2021-12-17 23:23:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1996 transitions. [2021-12-17 23:23:43,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587905935050392 [2021-12-17 23:23:43,807 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1996 transitions. [2021-12-17 23:23:43,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1996 transitions. [2021-12-17 23:23:43,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:43,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1996 transitions. [2021-12-17 23:23:43,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.526315789473685) internal successors, (1996), 38 states have internal predecessors, (1996), 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 23:23:43,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:43,811 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:43,811 INFO L186 Difference]: Start difference. First operand has 409 places, 350 transitions, 4176 flow. Second operand 38 states and 1996 transitions. [2021-12-17 23:23:43,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 387 transitions, 5208 flow [2021-12-17 23:23:43,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 387 transitions, 4797 flow, removed 88 selfloop flow, removed 38 redundant places. [2021-12-17 23:23:43,890 INFO L242 Difference]: Finished difference. Result has 389 places, 356 transitions, 4149 flow [2021-12-17 23:23:43,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4149, PETRI_PLACES=389, PETRI_TRANSITIONS=356} [2021-12-17 23:23:43,890 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 301 predicate places. [2021-12-17 23:23:43,890 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 356 transitions, 4149 flow [2021-12-17 23:23:43,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:43,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:43,891 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] [2021-12-17 23:23:43,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-12-17 23:23:43,891 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash 634009678, now seen corresponding path program 135 times [2021-12-17 23:23:43,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:43,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400334747] [2021-12-17 23:23:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:43,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:44,183 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 23:23:44,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400334747] [2021-12-17 23:23:44,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400334747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:44,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:44,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:44,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432317298] [2021-12-17 23:23:44,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:44,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:44,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:44,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:44,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 356 transitions, 4149 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:44,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:44,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:44,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:45,344 INFO L129 PetriNetUnfolder]: 285/876 cut-off events. [2021-12-17 23:23:45,344 INFO L130 PetriNetUnfolder]: For 8182/8182 co-relation queries the response was YES. [2021-12-17 23:23:45,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 876 events. 285/876 cut-off events. For 8182/8182 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4769 event pairs, 40 based on Foata normal form. 1/876 useless extension candidates. Maximal degree in co-relation 5588. Up to 559 conditions per place. [2021-12-17 23:23:45,355 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 223 selfloop transitions, 87 changer transitions 29/378 dead transitions. [2021-12-17 23:23:45,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 378 transitions, 4945 flow [2021-12-17 23:23:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:23:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:23:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1791 transitions. [2021-12-17 23:23:45,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603879849812266 [2021-12-17 23:23:45,357 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1791 transitions. [2021-12-17 23:23:45,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1791 transitions. [2021-12-17 23:23:45,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:45,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1791 transitions. [2021-12-17 23:23:45,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.6764705882353) internal successors, (1791), 34 states have internal predecessors, (1791), 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 23:23:45,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:45,360 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:23:45,360 INFO L186 Difference]: Start difference. First operand has 389 places, 356 transitions, 4149 flow. Second operand 34 states and 1791 transitions. [2021-12-17 23:23:45,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 378 transitions, 4945 flow [2021-12-17 23:23:45,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 378 transitions, 4666 flow, removed 44 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:45,421 INFO L242 Difference]: Finished difference. Result has 387 places, 336 transitions, 3766 flow [2021-12-17 23:23:45,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3766, PETRI_PLACES=387, PETRI_TRANSITIONS=336} [2021-12-17 23:23:45,421 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 299 predicate places. [2021-12-17 23:23:45,422 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 336 transitions, 3766 flow [2021-12-17 23:23:45,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:45,422 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:45,422 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] [2021-12-17 23:23:45,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-12-17 23:23:45,422 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash 360035668, now seen corresponding path program 136 times [2021-12-17 23:23:45,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:45,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641793067] [2021-12-17 23:23:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:45,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:45,772 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 23:23:45,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:45,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641793067] [2021-12-17 23:23:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641793067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:45,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239752043] [2021-12-17 23:23:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:45,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:45,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:45,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:45,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 336 transitions, 3766 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:45,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:45,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:45,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:48,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:23:49,004 INFO L129 PetriNetUnfolder]: 275/836 cut-off events. [2021-12-17 23:23:49,004 INFO L130 PetriNetUnfolder]: For 7385/7385 co-relation queries the response was YES. [2021-12-17 23:23:49,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5420 conditions, 836 events. 275/836 cut-off events. For 7385/7385 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4434 event pairs, 42 based on Foata normal form. 1/835 useless extension candidates. Maximal degree in co-relation 5291. Up to 550 conditions per place. [2021-12-17 23:23:49,013 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 215 selfloop transitions, 84 changer transitions 19/357 dead transitions. [2021-12-17 23:23:49,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 357 transitions, 4510 flow [2021-12-17 23:23:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:23:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:23:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1839 transitions. [2021-12-17 23:23:49,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558966565349544 [2021-12-17 23:23:49,014 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1839 transitions. [2021-12-17 23:23:49,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1839 transitions. [2021-12-17 23:23:49,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:49,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1839 transitions. [2021-12-17 23:23:49,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.542857142857144) internal successors, (1839), 35 states have internal predecessors, (1839), 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 23:23:49,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:23:49,018 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:23:49,018 INFO L186 Difference]: Start difference. First operand has 387 places, 336 transitions, 3766 flow. Second operand 35 states and 1839 transitions. [2021-12-17 23:23:49,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 357 transitions, 4510 flow [2021-12-17 23:23:49,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 4211 flow, removed 46 selfloop flow, removed 34 redundant places. [2021-12-17 23:23:49,073 INFO L242 Difference]: Finished difference. Result has 383 places, 325 transitions, 3543 flow [2021-12-17 23:23:49,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3543, PETRI_PLACES=383, PETRI_TRANSITIONS=325} [2021-12-17 23:23:49,074 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 295 predicate places. [2021-12-17 23:23:49,074 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 325 transitions, 3543 flow [2021-12-17 23:23:49,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:49,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:49,074 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] [2021-12-17 23:23:49,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-12-17 23:23:49,075 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1045866340, now seen corresponding path program 137 times [2021-12-17 23:23:49,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:49,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298301105] [2021-12-17 23:23:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:49,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:49,458 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 23:23:49,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:49,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298301105] [2021-12-17 23:23:49,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298301105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:49,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:49,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:49,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968342699] [2021-12-17 23:23:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:49,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:49,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:49,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:49,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 325 transitions, 3543 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:49,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:49,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:49,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:50,745 INFO L129 PetriNetUnfolder]: 272/820 cut-off events. [2021-12-17 23:23:50,745 INFO L130 PetriNetUnfolder]: For 7177/7177 co-relation queries the response was YES. [2021-12-17 23:23:50,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 820 events. 272/820 cut-off events. For 7177/7177 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4248 event pairs, 42 based on Foata normal form. 1/819 useless extension candidates. Maximal degree in co-relation 5158. Up to 564 conditions per place. [2021-12-17 23:23:50,756 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 218 selfloop transitions, 67 changer transitions 20/344 dead transitions. [2021-12-17 23:23:50,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 344 transitions, 4235 flow [2021-12-17 23:23:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:23:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:23:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1629 transitions. [2021-12-17 23:23:50,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.559025394646534 [2021-12-17 23:23:50,757 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1629 transitions. [2021-12-17 23:23:50,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1629 transitions. [2021-12-17 23:23:50,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:50,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1629 transitions. [2021-12-17 23:23:50,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.54838709677419) internal successors, (1629), 31 states have internal predecessors, (1629), 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 23:23:50,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:23:50,761 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:23:50,761 INFO L186 Difference]: Start difference. First operand has 383 places, 325 transitions, 3543 flow. Second operand 31 states and 1629 transitions. [2021-12-17 23:23:50,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 344 transitions, 4235 flow [2021-12-17 23:23:50,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 344 transitions, 3947 flow, removed 14 selfloop flow, removed 36 redundant places. [2021-12-17 23:23:50,820 INFO L242 Difference]: Finished difference. Result has 365 places, 315 transitions, 3276 flow [2021-12-17 23:23:50,820 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3276, PETRI_PLACES=365, PETRI_TRANSITIONS=315} [2021-12-17 23:23:50,820 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 277 predicate places. [2021-12-17 23:23:50,820 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 315 transitions, 3276 flow [2021-12-17 23:23:50,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:50,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:50,821 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] [2021-12-17 23:23:50,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-12-17 23:23:50,821 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash -771812824, now seen corresponding path program 138 times [2021-12-17 23:23:50,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:50,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727948488] [2021-12-17 23:23:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:50,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:51,176 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 23:23:51,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727948488] [2021-12-17 23:23:51,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727948488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:51,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:51,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:23:51,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695279939] [2021-12-17 23:23:51,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:51,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:23:51,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:23:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:23:51,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:51,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 315 transitions, 3276 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:51,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:51,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:51,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:52,376 INFO L129 PetriNetUnfolder]: 269/808 cut-off events. [2021-12-17 23:23:52,376 INFO L130 PetriNetUnfolder]: For 6399/6399 co-relation queries the response was YES. [2021-12-17 23:23:52,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5062 conditions, 808 events. 269/808 cut-off events. For 6399/6399 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4163 event pairs, 57 based on Foata normal form. 1/807 useless extension candidates. Maximal degree in co-relation 4942. Up to 536 conditions per place. [2021-12-17 23:23:52,385 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 198 selfloop transitions, 58 changer transitions 42/337 dead transitions. [2021-12-17 23:23:52,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 337 transitions, 3979 flow [2021-12-17 23:23:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:23:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:23:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1685 transitions. [2021-12-17 23:23:52,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601728723404256 [2021-12-17 23:23:52,387 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1685 transitions. [2021-12-17 23:23:52,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1685 transitions. [2021-12-17 23:23:52,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:52,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1685 transitions. [2021-12-17 23:23:52,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.65625) internal successors, (1685), 32 states have internal predecessors, (1685), 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 23:23:52,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:23:52,390 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:23:52,390 INFO L186 Difference]: Start difference. First operand has 365 places, 315 transitions, 3276 flow. Second operand 32 states and 1685 transitions. [2021-12-17 23:23:52,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 337 transitions, 3979 flow [2021-12-17 23:23:52,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 337 transitions, 3743 flow, removed 15 selfloop flow, removed 35 redundant places. [2021-12-17 23:23:52,435 INFO L242 Difference]: Finished difference. Result has 350 places, 286 transitions, 2847 flow [2021-12-17 23:23:52,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2847, PETRI_PLACES=350, PETRI_TRANSITIONS=286} [2021-12-17 23:23:52,435 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 262 predicate places. [2021-12-17 23:23:52,435 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 286 transitions, 2847 flow [2021-12-17 23:23:52,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:23:52,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:52,436 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] [2021-12-17 23:23:52,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-12-17 23:23:52,436 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1284266804, now seen corresponding path program 139 times [2021-12-17 23:23:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199774692] [2021-12-17 23:23:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:52,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:52,729 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 23:23:52,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199774692] [2021-12-17 23:23:52,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199774692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:52,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:52,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:52,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038495112] [2021-12-17 23:23:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:52,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:52,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:52,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 286 transitions, 2847 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:52,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:52,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:52,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:54,225 INFO L129 PetriNetUnfolder]: 264/791 cut-off events. [2021-12-17 23:23:54,225 INFO L130 PetriNetUnfolder]: For 6501/6501 co-relation queries the response was YES. [2021-12-17 23:23:54,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 791 events. 264/791 cut-off events. For 6501/6501 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4047 event pairs, 42 based on Foata normal form. 1/790 useless extension candidates. Maximal degree in co-relation 4745. Up to 499 conditions per place. [2021-12-17 23:23:54,233 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 167 selfloop transitions, 97 changer transitions 21/324 dead transitions. [2021-12-17 23:23:54,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 324 transitions, 3778 flow [2021-12-17 23:23:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1989 transitions. [2021-12-17 23:23:54,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5568309070548713 [2021-12-17 23:23:54,235 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1989 transitions. [2021-12-17 23:23:54,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1989 transitions. [2021-12-17 23:23:54,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:54,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1989 transitions. [2021-12-17 23:23:54,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.3421052631579) internal successors, (1989), 38 states have internal predecessors, (1989), 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 23:23:54,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:54,238 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:54,238 INFO L186 Difference]: Start difference. First operand has 350 places, 286 transitions, 2847 flow. Second operand 38 states and 1989 transitions. [2021-12-17 23:23:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 324 transitions, 3778 flow [2021-12-17 23:23:54,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 324 transitions, 3470 flow, removed 43 selfloop flow, removed 38 redundant places. [2021-12-17 23:23:54,278 INFO L242 Difference]: Finished difference. Result has 335 places, 291 transitions, 2908 flow [2021-12-17 23:23:54,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2908, PETRI_PLACES=335, PETRI_TRANSITIONS=291} [2021-12-17 23:23:54,279 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 247 predicate places. [2021-12-17 23:23:54,279 INFO L470 AbstractCegarLoop]: Abstraction has has 335 places, 291 transitions, 2908 flow [2021-12-17 23:23:54,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:54,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:54,279 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] [2021-12-17 23:23:54,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-12-17 23:23:54,279 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1332342656, now seen corresponding path program 140 times [2021-12-17 23:23:54,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896891089] [2021-12-17 23:23:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:54,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:54,602 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 23:23:54,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896891089] [2021-12-17 23:23:54,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896891089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:54,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:54,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:54,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177025609] [2021-12-17 23:23:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:54,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:54,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:54,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:54,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 291 transitions, 2908 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:54,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:54,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:54,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:56,660 INFO L129 PetriNetUnfolder]: 261/791 cut-off events. [2021-12-17 23:23:56,660 INFO L130 PetriNetUnfolder]: For 6434/6434 co-relation queries the response was YES. [2021-12-17 23:23:56,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4782 conditions, 791 events. 261/791 cut-off events. For 6434/6434 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4041 event pairs, 42 based on Foata normal form. 1/790 useless extension candidates. Maximal degree in co-relation 4674. Up to 498 conditions per place. [2021-12-17 23:23:56,669 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 104 changer transitions 17/321 dead transitions. [2021-12-17 23:23:56,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 321 transitions, 3729 flow [2021-12-17 23:23:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:23:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 23:23:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2190 transitions. [2021-12-17 23:23:56,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5547112462006079 [2021-12-17 23:23:56,671 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2190 transitions. [2021-12-17 23:23:56,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2190 transitions. [2021-12-17 23:23:56,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:56,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2190 transitions. [2021-12-17 23:23:56,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.142857142857146) internal successors, (2190), 42 states have internal predecessors, (2190), 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 23:23:56,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:23:56,674 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:23:56,674 INFO L186 Difference]: Start difference. First operand has 335 places, 291 transitions, 2908 flow. Second operand 42 states and 2190 transitions. [2021-12-17 23:23:56,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 321 transitions, 3729 flow [2021-12-17 23:23:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 321 transitions, 3488 flow, removed 60 selfloop flow, removed 29 redundant places. [2021-12-17 23:23:56,714 INFO L242 Difference]: Finished difference. Result has 348 places, 293 transitions, 3001 flow [2021-12-17 23:23:56,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3001, PETRI_PLACES=348, PETRI_TRANSITIONS=293} [2021-12-17 23:23:56,714 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 260 predicate places. [2021-12-17 23:23:56,714 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 293 transitions, 3001 flow [2021-12-17 23:23:56,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:56,714 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:56,714 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] [2021-12-17 23:23:56,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-12-17 23:23:56,715 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1984561284, now seen corresponding path program 141 times [2021-12-17 23:23:56,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:56,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104281134] [2021-12-17 23:23:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:56,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:57,028 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 23:23:57,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104281134] [2021-12-17 23:23:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104281134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:57,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:57,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:23:57,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566743037] [2021-12-17 23:23:57,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:57,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:23:57,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:23:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:23:57,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:57,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 293 transitions, 3001 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:57,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:57,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:57,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:23:58,393 INFO L129 PetriNetUnfolder]: 261/792 cut-off events. [2021-12-17 23:23:58,393 INFO L130 PetriNetUnfolder]: For 6319/6319 co-relation queries the response was YES. [2021-12-17 23:23:58,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4873 conditions, 792 events. 261/792 cut-off events. For 6319/6319 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4084 event pairs, 58 based on Foata normal form. 1/790 useless extension candidates. Maximal degree in co-relation 4764. Up to 502 conditions per place. [2021-12-17 23:23:58,402 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 167 selfloop transitions, 91 changer transitions 26/323 dead transitions. [2021-12-17 23:23:58,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 323 transitions, 3847 flow [2021-12-17 23:23:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:23:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:23:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1988 transitions. [2021-12-17 23:23:58,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5565509518477044 [2021-12-17 23:23:58,404 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1988 transitions. [2021-12-17 23:23:58,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1988 transitions. [2021-12-17 23:23:58,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:23:58,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1988 transitions. [2021-12-17 23:23:58,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.31578947368421) internal successors, (1988), 38 states have internal predecessors, (1988), 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 23:23:58,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:58,407 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:23:58,407 INFO L186 Difference]: Start difference. First operand has 348 places, 293 transitions, 3001 flow. Second operand 38 states and 1988 transitions. [2021-12-17 23:23:58,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 323 transitions, 3847 flow [2021-12-17 23:23:58,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 323 transitions, 3583 flow, removed 35 selfloop flow, removed 37 redundant places. [2021-12-17 23:23:58,451 INFO L242 Difference]: Finished difference. Result has 349 places, 287 transitions, 2933 flow [2021-12-17 23:23:58,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2933, PETRI_PLACES=349, PETRI_TRANSITIONS=287} [2021-12-17 23:23:58,451 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 261 predicate places. [2021-12-17 23:23:58,451 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 287 transitions, 2933 flow [2021-12-17 23:23:58,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:23:58,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:23:58,451 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] [2021-12-17 23:23:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-12-17 23:23:58,452 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:23:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:23:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -345050578, now seen corresponding path program 142 times [2021-12-17 23:23:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:23:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169909140] [2021-12-17 23:23:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:23:58,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:23:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:23:58,792 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 23:23:58,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:23:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169909140] [2021-12-17 23:23:58,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169909140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:23:58,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:23:58,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:23:58,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020499177] [2021-12-17 23:23:58,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:23:58,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:23:58,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:23:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:23:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:23:58,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:23:58,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 287 transitions, 2933 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:23:58,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:23:58,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:23:58,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:01,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:24:01,843 INFO L129 PetriNetUnfolder]: 256/769 cut-off events. [2021-12-17 23:24:01,843 INFO L130 PetriNetUnfolder]: For 6494/6494 co-relation queries the response was YES. [2021-12-17 23:24:01,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4813 conditions, 769 events. 256/769 cut-off events. For 6494/6494 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3902 event pairs, 56 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 4701. Up to 494 conditions per place. [2021-12-17 23:24:01,851 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 164 selfloop transitions, 96 changer transitions 17/316 dead transitions. [2021-12-17 23:24:01,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 316 transitions, 3784 flow [2021-12-17 23:24:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:24:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:24:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2037 transitions. [2021-12-17 23:24:01,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5556464811783961 [2021-12-17 23:24:01,852 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2037 transitions. [2021-12-17 23:24:01,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2037 transitions. [2021-12-17 23:24:01,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:01,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2037 transitions. [2021-12-17 23:24:01,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.23076923076923) internal successors, (2037), 39 states have internal predecessors, (2037), 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 23:24:01,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:24:01,856 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:24:01,856 INFO L186 Difference]: Start difference. First operand has 349 places, 287 transitions, 2933 flow. Second operand 39 states and 2037 transitions. [2021-12-17 23:24:01,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 316 transitions, 3784 flow [2021-12-17 23:24:01,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 316 transitions, 3494 flow, removed 58 selfloop flow, removed 35 redundant places. [2021-12-17 23:24:01,902 INFO L242 Difference]: Finished difference. Result has 353 places, 287 transitions, 2956 flow [2021-12-17 23:24:01,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2956, PETRI_PLACES=353, PETRI_TRANSITIONS=287} [2021-12-17 23:24:01,903 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 265 predicate places. [2021-12-17 23:24:01,903 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 287 transitions, 2956 flow [2021-12-17 23:24:01,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:24:01,903 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:01,903 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] [2021-12-17 23:24:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-12-17 23:24:01,903 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1224628590, now seen corresponding path program 143 times [2021-12-17 23:24:01,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440341615] [2021-12-17 23:24:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:02,229 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 23:24:02,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440341615] [2021-12-17 23:24:02,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440341615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:02,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:02,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:24:02,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742224518] [2021-12-17 23:24:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:02,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:24:02,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:24:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:24:02,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:02,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 287 transitions, 2956 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:02,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:02,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:02,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:03,329 INFO L129 PetriNetUnfolder]: 251/759 cut-off events. [2021-12-17 23:24:03,329 INFO L130 PetriNetUnfolder]: For 6819/6819 co-relation queries the response was YES. [2021-12-17 23:24:03,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4744 conditions, 759 events. 251/759 cut-off events. For 6819/6819 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3827 event pairs, 40 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4631. Up to 489 conditions per place. [2021-12-17 23:24:03,337 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 72 changer transitions 33/306 dead transitions. [2021-12-17 23:24:03,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 306 transitions, 3583 flow [2021-12-17 23:24:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:24:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:24:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1934 transitions. [2021-12-17 23:24:03,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5560667050028753 [2021-12-17 23:24:03,339 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1934 transitions. [2021-12-17 23:24:03,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1934 transitions. [2021-12-17 23:24:03,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:03,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1934 transitions. [2021-12-17 23:24:03,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.270270270270274) internal successors, (1934), 37 states have internal predecessors, (1934), 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 23:24:03,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:03,342 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:03,342 INFO L186 Difference]: Start difference. First operand has 353 places, 287 transitions, 2956 flow. Second operand 37 states and 1934 transitions. [2021-12-17 23:24:03,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 306 transitions, 3583 flow [2021-12-17 23:24:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 306 transitions, 3292 flow, removed 58 selfloop flow, removed 34 redundant places. [2021-12-17 23:24:03,385 INFO L242 Difference]: Finished difference. Result has 353 places, 263 transitions, 2549 flow [2021-12-17 23:24:03,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2549, PETRI_PLACES=353, PETRI_TRANSITIONS=263} [2021-12-17 23:24:03,385 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 265 predicate places. [2021-12-17 23:24:03,385 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 263 transitions, 2549 flow [2021-12-17 23:24:03,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:03,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:03,386 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] [2021-12-17 23:24:03,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-12-17 23:24:03,386 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -339854612, now seen corresponding path program 144 times [2021-12-17 23:24:03,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:03,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428049815] [2021-12-17 23:24:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:03,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:03,741 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 23:24:03,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428049815] [2021-12-17 23:24:03,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428049815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:03,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:03,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:24:03,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498825456] [2021-12-17 23:24:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:03,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:24:03,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:24:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:24:03,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:03,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 263 transitions, 2549 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:24:03,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:03,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:03,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:04,964 INFO L129 PetriNetUnfolder]: 240/712 cut-off events. [2021-12-17 23:24:04,964 INFO L130 PetriNetUnfolder]: For 6186/6186 co-relation queries the response was YES. [2021-12-17 23:24:04,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 712 events. 240/712 cut-off events. For 6186/6186 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3470 event pairs, 41 based on Foata normal form. 1/711 useless extension candidates. Maximal degree in co-relation 4326. Up to 480 conditions per place. [2021-12-17 23:24:04,972 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 153 selfloop transitions, 70 changer transitions 19/281 dead transitions. [2021-12-17 23:24:04,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 281 transitions, 3116 flow [2021-12-17 23:24:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:24:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:24:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1979 transitions. [2021-12-17 23:24:04,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5540313549832027 [2021-12-17 23:24:04,974 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1979 transitions. [2021-12-17 23:24:04,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1979 transitions. [2021-12-17 23:24:04,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:04,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1979 transitions. [2021-12-17 23:24:04,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.078947368421055) internal successors, (1979), 38 states have internal predecessors, (1979), 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 23:24:04,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:24:04,977 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:24:04,977 INFO L186 Difference]: Start difference. First operand has 353 places, 263 transitions, 2549 flow. Second operand 38 states and 1979 transitions. [2021-12-17 23:24:04,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 281 transitions, 3116 flow [2021-12-17 23:24:05,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 281 transitions, 2850 flow, removed 41 selfloop flow, removed 42 redundant places. [2021-12-17 23:24:05,016 INFO L242 Difference]: Finished difference. Result has 337 places, 252 transitions, 2367 flow [2021-12-17 23:24:05,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2367, PETRI_PLACES=337, PETRI_TRANSITIONS=252} [2021-12-17 23:24:05,016 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 249 predicate places. [2021-12-17 23:24:05,016 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 252 transitions, 2367 flow [2021-12-17 23:24:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:24:05,017 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:05,017 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] [2021-12-17 23:24:05,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-12-17 23:24:05,017 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2003212612, now seen corresponding path program 145 times [2021-12-17 23:24:05,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:05,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350622760] [2021-12-17 23:24:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:05,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:05,330 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 23:24:05,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350622760] [2021-12-17 23:24:05,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350622760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:05,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:05,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:24:05,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827287941] [2021-12-17 23:24:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:05,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:24:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:24:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:24:05,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:05,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 252 transitions, 2367 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:05,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:05,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:05,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:06,327 INFO L129 PetriNetUnfolder]: 236/702 cut-off events. [2021-12-17 23:24:06,327 INFO L130 PetriNetUnfolder]: For 5569/5569 co-relation queries the response was YES. [2021-12-17 23:24:06,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 702 events. 236/702 cut-off events. For 5569/5569 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3369 event pairs, 57 based on Foata normal form. 1/701 useless extension candidates. Maximal degree in co-relation 4192. Up to 463 conditions per place. [2021-12-17 23:24:06,334 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 142 selfloop transitions, 70 changer transitions 19/270 dead transitions. [2021-12-17 23:24:06,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 270 transitions, 2913 flow [2021-12-17 23:24:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:24:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:24:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1729 transitions. [2021-12-17 23:24:06,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5573823339780787 [2021-12-17 23:24:06,335 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1729 transitions. [2021-12-17 23:24:06,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1729 transitions. [2021-12-17 23:24:06,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:06,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1729 transitions. [2021-12-17 23:24:06,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.39393939393939) internal successors, (1729), 33 states have internal predecessors, (1729), 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 23:24:06,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:24:06,338 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:24:06,338 INFO L186 Difference]: Start difference. First operand has 337 places, 252 transitions, 2367 flow. Second operand 33 states and 1729 transitions. [2021-12-17 23:24:06,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 270 transitions, 2913 flow [2021-12-17 23:24:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 270 transitions, 2699 flow, removed 13 selfloop flow, removed 39 redundant places. [2021-12-17 23:24:06,372 INFO L242 Difference]: Finished difference. Result has 320 places, 242 transitions, 2238 flow [2021-12-17 23:24:06,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2238, PETRI_PLACES=320, PETRI_TRANSITIONS=242} [2021-12-17 23:24:06,372 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 232 predicate places. [2021-12-17 23:24:06,372 INFO L470 AbstractCegarLoop]: Abstraction has has 320 places, 242 transitions, 2238 flow [2021-12-17 23:24:06,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:06,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:06,373 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] [2021-12-17 23:24:06,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-12-17 23:24:06,373 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1023070804, now seen corresponding path program 146 times [2021-12-17 23:24:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583707905] [2021-12-17 23:24:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:06,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:06,669 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 23:24:06,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583707905] [2021-12-17 23:24:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583707905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:06,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:06,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:24:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074705553] [2021-12-17 23:24:06,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:06,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:24:06,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:24:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:24:06,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:06,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 242 transitions, 2238 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:06,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:06,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:06,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:07,889 INFO L129 PetriNetUnfolder]: 231/683 cut-off events. [2021-12-17 23:24:07,889 INFO L130 PetriNetUnfolder]: For 5069/5069 co-relation queries the response was YES. [2021-12-17 23:24:07,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4139 conditions, 683 events. 231/683 cut-off events. For 5069/5069 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3236 event pairs, 56 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 4036. Up to 455 conditions per place. [2021-12-17 23:24:07,896 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 135 selfloop transitions, 61 changer transitions 25/260 dead transitions. [2021-12-17 23:24:07,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 260 transitions, 2764 flow [2021-12-17 23:24:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1778 transitions. [2021-12-17 23:24:07,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5563204005006258 [2021-12-17 23:24:07,898 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1778 transitions. [2021-12-17 23:24:07,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1778 transitions. [2021-12-17 23:24:07,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:07,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1778 transitions. [2021-12-17 23:24:07,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.294117647058826) internal successors, (1778), 34 states have internal predecessors, (1778), 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 23:24:07,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:07,901 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:07,901 INFO L186 Difference]: Start difference. First operand has 320 places, 242 transitions, 2238 flow. Second operand 34 states and 1778 transitions. [2021-12-17 23:24:07,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 260 transitions, 2764 flow [2021-12-17 23:24:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 260 transitions, 2569 flow, removed 11 selfloop flow, removed 35 redundant places. [2021-12-17 23:24:07,928 INFO L242 Difference]: Finished difference. Result has 311 places, 226 transitions, 2066 flow [2021-12-17 23:24:07,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2066, PETRI_PLACES=311, PETRI_TRANSITIONS=226} [2021-12-17 23:24:07,929 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 223 predicate places. [2021-12-17 23:24:07,929 INFO L470 AbstractCegarLoop]: Abstraction has has 311 places, 226 transitions, 2066 flow [2021-12-17 23:24:07,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:07,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:07,929 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] [2021-12-17 23:24:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-12-17 23:24:07,930 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash 690231074, now seen corresponding path program 147 times [2021-12-17 23:24:07,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:07,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699188986] [2021-12-17 23:24:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:07,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:08,279 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 23:24:08,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699188986] [2021-12-17 23:24:08,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699188986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:08,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:08,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:24:08,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826397748] [2021-12-17 23:24:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:08,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:24:08,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:24:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:24:08,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:08,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 226 transitions, 2066 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:24:08,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:08,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:08,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:09,394 INFO L129 PetriNetUnfolder]: 224/663 cut-off events. [2021-12-17 23:24:09,394 INFO L130 PetriNetUnfolder]: For 4971/4971 co-relation queries the response was YES. [2021-12-17 23:24:09,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4016 conditions, 663 events. 224/663 cut-off events. For 4971/4971 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3120 event pairs, 59 based on Foata normal form. 1/661 useless extension candidates. Maximal degree in co-relation 3916. Up to 446 conditions per place. [2021-12-17 23:24:09,401 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 127 selfloop transitions, 56 changer transitions 21/243 dead transitions. [2021-12-17 23:24:09,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 243 transitions, 2552 flow [2021-12-17 23:24:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:24:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:24:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1720 transitions. [2021-12-17 23:24:09,404 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5544809800128949 [2021-12-17 23:24:09,404 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1720 transitions. [2021-12-17 23:24:09,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1720 transitions. [2021-12-17 23:24:09,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:09,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1720 transitions. [2021-12-17 23:24:09,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.121212121212125) internal successors, (1720), 33 states have internal predecessors, (1720), 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 23:24:09,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:24:09,407 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:24:09,407 INFO L186 Difference]: Start difference. First operand has 311 places, 226 transitions, 2066 flow. Second operand 33 states and 1720 transitions. [2021-12-17 23:24:09,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 243 transitions, 2552 flow [2021-12-17 23:24:09,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 243 transitions, 2360 flow, removed 14 selfloop flow, removed 35 redundant places. [2021-12-17 23:24:09,436 INFO L242 Difference]: Finished difference. Result has 293 places, 213 transitions, 1933 flow [2021-12-17 23:24:09,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1933, PETRI_PLACES=293, PETRI_TRANSITIONS=213} [2021-12-17 23:24:09,437 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 205 predicate places. [2021-12-17 23:24:09,437 INFO L470 AbstractCegarLoop]: Abstraction has has 293 places, 213 transitions, 1933 flow [2021-12-17 23:24:09,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:24:09,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:09,438 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] [2021-12-17 23:24:09,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-12-17 23:24:09,438 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 402619020, now seen corresponding path program 148 times [2021-12-17 23:24:09,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:09,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623974468] [2021-12-17 23:24:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:09,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:09,752 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 23:24:09,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:09,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623974468] [2021-12-17 23:24:09,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623974468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:09,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:09,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:24:09,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880411190] [2021-12-17 23:24:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:09,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:24:09,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:24:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:24:09,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:09,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 213 transitions, 1933 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:09,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:09,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:09,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:10,818 INFO L129 PetriNetUnfolder]: 221/643 cut-off events. [2021-12-17 23:24:10,818 INFO L130 PetriNetUnfolder]: For 4846/4846 co-relation queries the response was YES. [2021-12-17 23:24:10,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3912 conditions, 643 events. 221/643 cut-off events. For 4846/4846 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2930 event pairs, 58 based on Foata normal form. 1/642 useless extension candidates. Maximal degree in co-relation 3817. Up to 433 conditions per place. [2021-12-17 23:24:10,825 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 116 selfloop transitions, 46 changer transitions 31/232 dead transitions. [2021-12-17 23:24:10,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 232 transitions, 2399 flow [2021-12-17 23:24:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:24:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:24:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1621 transitions. [2021-12-17 23:24:10,826 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5562800274536719 [2021-12-17 23:24:10,826 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1621 transitions. [2021-12-17 23:24:10,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1621 transitions. [2021-12-17 23:24:10,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:10,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1621 transitions. [2021-12-17 23:24:10,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.29032258064516) internal successors, (1621), 31 states have internal predecessors, (1621), 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 23:24:10,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:24:10,829 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:24:10,829 INFO L186 Difference]: Start difference. First operand has 293 places, 213 transitions, 1933 flow. Second operand 31 states and 1621 transitions. [2021-12-17 23:24:10,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 232 transitions, 2399 flow [2021-12-17 23:24:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 232 transitions, 2139 flow, removed 19 selfloop flow, removed 31 redundant places. [2021-12-17 23:24:10,870 INFO L242 Difference]: Finished difference. Result has 274 places, 193 transitions, 1649 flow [2021-12-17 23:24:10,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1649, PETRI_PLACES=274, PETRI_TRANSITIONS=193} [2021-12-17 23:24:10,870 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2021-12-17 23:24:10,870 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 193 transitions, 1649 flow [2021-12-17 23:24:10,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:24:10,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:10,871 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] [2021-12-17 23:24:10,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-12-17 23:24:10,871 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1703789046, now seen corresponding path program 149 times [2021-12-17 23:24:10,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:10,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134325191] [2021-12-17 23:24:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:10,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:11,161 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 23:24:11,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134325191] [2021-12-17 23:24:11,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134325191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:11,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:11,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:11,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47427133] [2021-12-17 23:24:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:11,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:11,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:11,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:11,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 193 transitions, 1649 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:11,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:11,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:11,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:12,261 INFO L129 PetriNetUnfolder]: 265/731 cut-off events. [2021-12-17 23:24:12,262 INFO L130 PetriNetUnfolder]: For 5741/5741 co-relation queries the response was YES. [2021-12-17 23:24:12,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 731 events. 265/731 cut-off events. For 5741/5741 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3449 event pairs, 57 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 4302. Up to 445 conditions per place. [2021-12-17 23:24:12,269 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 137 selfloop transitions, 87 changer transitions 21/284 dead transitions. [2021-12-17 23:24:12,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 284 transitions, 3301 flow [2021-12-17 23:24:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:24:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:24:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1974 transitions. [2021-12-17 23:24:12,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2021-12-17 23:24:12,271 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1974 transitions. [2021-12-17 23:24:12,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1974 transitions. [2021-12-17 23:24:12,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:12,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1974 transitions. [2021-12-17 23:24:12,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.351351351351354) internal successors, (1974), 37 states have internal predecessors, (1974), 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 23:24:12,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:12,274 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:12,274 INFO L186 Difference]: Start difference. First operand has 274 places, 193 transitions, 1649 flow. Second operand 37 states and 1974 transitions. [2021-12-17 23:24:12,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 284 transitions, 3301 flow [2021-12-17 23:24:12,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 284 transitions, 2927 flow, removed 75 selfloop flow, removed 29 redundant places. [2021-12-17 23:24:12,299 INFO L242 Difference]: Finished difference. Result has 259 places, 236 transitions, 2257 flow [2021-12-17 23:24:12,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2257, PETRI_PLACES=259, PETRI_TRANSITIONS=236} [2021-12-17 23:24:12,299 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 171 predicate places. [2021-12-17 23:24:12,299 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 236 transitions, 2257 flow [2021-12-17 23:24:12,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:12,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:12,299 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] [2021-12-17 23:24:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-12-17 23:24:12,300 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1786111532, now seen corresponding path program 150 times [2021-12-17 23:24:12,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61486662] [2021-12-17 23:24:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:12,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:12,577 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 23:24:12,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:12,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61486662] [2021-12-17 23:24:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61486662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:12,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:24:12,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613820825] [2021-12-17 23:24:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:12,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:24:12,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:24:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:24:12,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:12,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 236 transitions, 2257 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:12,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:12,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:12,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:13,615 INFO L129 PetriNetUnfolder]: 309/840 cut-off events. [2021-12-17 23:24:13,615 INFO L130 PetriNetUnfolder]: For 8273/8273 co-relation queries the response was YES. [2021-12-17 23:24:13,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5312 conditions, 840 events. 309/840 cut-off events. For 8273/8273 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4152 event pairs, 50 based on Foata normal form. 1/839 useless extension candidates. Maximal degree in co-relation 5228. Up to 531 conditions per place. [2021-12-17 23:24:13,623 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 172 selfloop transitions, 99 changer transitions 21/331 dead transitions. [2021-12-17 23:24:13,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 331 transitions, 4129 flow [2021-12-17 23:24:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:24:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:24:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1873 transitions. [2021-12-17 23:24:13,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5693009118541034 [2021-12-17 23:24:13,625 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1873 transitions. [2021-12-17 23:24:13,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1873 transitions. [2021-12-17 23:24:13,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:13,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1873 transitions. [2021-12-17 23:24:13,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.51428571428571) internal successors, (1873), 35 states have internal predecessors, (1873), 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 23:24:13,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:24:13,628 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:24:13,628 INFO L186 Difference]: Start difference. First operand has 259 places, 236 transitions, 2257 flow. Second operand 35 states and 1873 transitions. [2021-12-17 23:24:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 331 transitions, 4129 flow [2021-12-17 23:24:13,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 331 transitions, 3647 flow, removed 218 selfloop flow, removed 11 redundant places. [2021-12-17 23:24:13,663 INFO L242 Difference]: Finished difference. Result has 287 places, 282 transitions, 2819 flow [2021-12-17 23:24:13,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2819, PETRI_PLACES=287, PETRI_TRANSITIONS=282} [2021-12-17 23:24:13,663 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 199 predicate places. [2021-12-17 23:24:13,663 INFO L470 AbstractCegarLoop]: Abstraction has has 287 places, 282 transitions, 2819 flow [2021-12-17 23:24:13,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:13,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:13,663 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] [2021-12-17 23:24:13,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-12-17 23:24:13,664 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1816759596, now seen corresponding path program 151 times [2021-12-17 23:24:13,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:13,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120670304] [2021-12-17 23:24:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:13,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:13,975 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 23:24:13,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120670304] [2021-12-17 23:24:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120670304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:13,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:24:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982949551] [2021-12-17 23:24:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:24:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:24:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:24:13,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:13,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 282 transitions, 2819 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:13,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:13,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:13,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:15,194 INFO L129 PetriNetUnfolder]: 328/861 cut-off events. [2021-12-17 23:24:15,194 INFO L130 PetriNetUnfolder]: For 10428/10428 co-relation queries the response was YES. [2021-12-17 23:24:15,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5953 conditions, 861 events. 328/861 cut-off events. For 10428/10428 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4347 event pairs, 58 based on Foata normal form. 1/859 useless extension candidates. Maximal degree in co-relation 5859. Up to 582 conditions per place. [2021-12-17 23:24:15,203 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 191 selfloop transitions, 97 changer transitions 34/361 dead transitions. [2021-12-17 23:24:15,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 361 transitions, 4528 flow [2021-12-17 23:24:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:24:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:24:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-12-17 23:24:15,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-12-17 23:24:15,205 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-12-17 23:24:15,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-12-17 23:24:15,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:15,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-12-17 23:24:15,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 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 23:24:15,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:24:15,210 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:24:15,210 INFO L186 Difference]: Start difference. First operand has 287 places, 282 transitions, 2819 flow. Second operand 39 states and 2062 transitions. [2021-12-17 23:24:15,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 361 transitions, 4528 flow [2021-12-17 23:24:15,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 361 transitions, 3854 flow, removed 318 selfloop flow, removed 11 redundant places. [2021-12-17 23:24:15,256 INFO L242 Difference]: Finished difference. Result has 320 places, 308 transitions, 2989 flow [2021-12-17 23:24:15,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2989, PETRI_PLACES=320, PETRI_TRANSITIONS=308} [2021-12-17 23:24:15,257 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 232 predicate places. [2021-12-17 23:24:15,257 INFO L470 AbstractCegarLoop]: Abstraction has has 320 places, 308 transitions, 2989 flow [2021-12-17 23:24:15,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:15,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:15,257 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] [2021-12-17 23:24:15,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-12-17 23:24:15,258 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1931600278, now seen corresponding path program 152 times [2021-12-17 23:24:15,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:15,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106270931] [2021-12-17 23:24:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:15,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:15,520 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 23:24:15,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106270931] [2021-12-17 23:24:15,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106270931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:15,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:15,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349555220] [2021-12-17 23:24:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:15,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:15,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:15,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:15,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 308 transitions, 2989 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:15,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:15,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:15,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:16,588 INFO L129 PetriNetUnfolder]: 348/911 cut-off events. [2021-12-17 23:24:16,588 INFO L130 PetriNetUnfolder]: For 11887/11887 co-relation queries the response was YES. [2021-12-17 23:24:16,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6415 conditions, 911 events. 348/911 cut-off events. For 11887/11887 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4715 event pairs, 43 based on Foata normal form. 1/909 useless extension candidates. Maximal degree in co-relation 6311. Up to 599 conditions per place. [2021-12-17 23:24:16,598 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 208 selfloop transitions, 106 changer transitions 40/393 dead transitions. [2021-12-17 23:24:16,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 393 transitions, 4825 flow [2021-12-17 23:24:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1812 transitions. [2021-12-17 23:24:16,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5669586983729662 [2021-12-17 23:24:16,600 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1812 transitions. [2021-12-17 23:24:16,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1812 transitions. [2021-12-17 23:24:16,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:16,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1812 transitions. [2021-12-17 23:24:16,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.294117647058826) internal successors, (1812), 34 states have internal predecessors, (1812), 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 23:24:16,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:16,603 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:16,603 INFO L186 Difference]: Start difference. First operand has 320 places, 308 transitions, 2989 flow. Second operand 34 states and 1812 transitions. [2021-12-17 23:24:16,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 393 transitions, 4825 flow [2021-12-17 23:24:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 393 transitions, 4315 flow, removed 197 selfloop flow, removed 26 redundant places. [2021-12-17 23:24:16,655 INFO L242 Difference]: Finished difference. Result has 332 places, 333 transitions, 3340 flow [2021-12-17 23:24:16,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3340, PETRI_PLACES=332, PETRI_TRANSITIONS=333} [2021-12-17 23:24:16,655 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 244 predicate places. [2021-12-17 23:24:16,655 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 333 transitions, 3340 flow [2021-12-17 23:24:16,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:16,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:16,656 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] [2021-12-17 23:24:16,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-12-17 23:24:16,656 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1731128100, now seen corresponding path program 153 times [2021-12-17 23:24:16,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:16,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931782886] [2021-12-17 23:24:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:16,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:16,985 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 23:24:16,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931782886] [2021-12-17 23:24:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931782886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:16,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:16,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:24:16,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167117827] [2021-12-17 23:24:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:16,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:24:16,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:24:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:24:16,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:16,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 333 transitions, 3340 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:16,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:16,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:16,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:18,110 INFO L129 PetriNetUnfolder]: 341/962 cut-off events. [2021-12-17 23:24:18,110 INFO L130 PetriNetUnfolder]: For 12916/12916 co-relation queries the response was YES. [2021-12-17 23:24:18,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6554 conditions, 962 events. 341/962 cut-off events. For 12916/12916 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5281 event pairs, 61 based on Foata normal form. 1/960 useless extension candidates. Maximal degree in co-relation 6442. Up to 615 conditions per place. [2021-12-17 23:24:18,121 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 216 selfloop transitions, 92 changer transitions 35/382 dead transitions. [2021-12-17 23:24:18,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 382 transitions, 4589 flow [2021-12-17 23:24:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1805 transitions. [2021-12-17 23:24:18,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647684605757196 [2021-12-17 23:24:18,123 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1805 transitions. [2021-12-17 23:24:18,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1805 transitions. [2021-12-17 23:24:18,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:18,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1805 transitions. [2021-12-17 23:24:18,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.088235294117645) internal successors, (1805), 34 states have internal predecessors, (1805), 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 23:24:18,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:18,126 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:18,126 INFO L186 Difference]: Start difference. First operand has 332 places, 333 transitions, 3340 flow. Second operand 34 states and 1805 transitions. [2021-12-17 23:24:18,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 382 transitions, 4589 flow [2021-12-17 23:24:18,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 382 transitions, 4250 flow, removed 118 selfloop flow, removed 26 redundant places. [2021-12-17 23:24:18,189 INFO L242 Difference]: Finished difference. Result has 342 places, 330 transitions, 3318 flow [2021-12-17 23:24:18,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3318, PETRI_PLACES=342, PETRI_TRANSITIONS=330} [2021-12-17 23:24:18,190 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 254 predicate places. [2021-12-17 23:24:18,190 INFO L470 AbstractCegarLoop]: Abstraction has has 342 places, 330 transitions, 3318 flow [2021-12-17 23:24:18,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:18,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:18,191 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] [2021-12-17 23:24:18,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-12-17 23:24:18,191 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 802061146, now seen corresponding path program 154 times [2021-12-17 23:24:18,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429464074] [2021-12-17 23:24:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:18,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:18,478 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 23:24:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429464074] [2021-12-17 23:24:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429464074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:18,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:18,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565470006] [2021-12-17 23:24:18,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:18,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:18,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:18,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:18,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 330 transitions, 3318 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:18,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:18,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:18,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:19,740 INFO L129 PetriNetUnfolder]: 363/1009 cut-off events. [2021-12-17 23:24:19,740 INFO L130 PetriNetUnfolder]: For 14035/14035 co-relation queries the response was YES. [2021-12-17 23:24:19,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1009 events. 363/1009 cut-off events. For 14035/14035 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5550 event pairs, 43 based on Foata normal form. 1/1007 useless extension candidates. Maximal degree in co-relation 6970. Up to 587 conditions per place. [2021-12-17 23:24:19,750 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 189 selfloop transitions, 167 changer transitions 22/417 dead transitions. [2021-12-17 23:24:19,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 417 transitions, 5554 flow [2021-12-17 23:24:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:24:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:24:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2125 transitions. [2021-12-17 23:24:19,752 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5651595744680851 [2021-12-17 23:24:19,752 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2125 transitions. [2021-12-17 23:24:19,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2125 transitions. [2021-12-17 23:24:19,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:19,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2125 transitions. [2021-12-17 23:24:19,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.125) internal successors, (2125), 40 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:19,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:19,755 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:19,755 INFO L186 Difference]: Start difference. First operand has 342 places, 330 transitions, 3318 flow. Second operand 40 states and 2125 transitions. [2021-12-17 23:24:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 417 transitions, 5554 flow [2021-12-17 23:24:19,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 417 transitions, 5229 flow, removed 47 selfloop flow, removed 34 redundant places. [2021-12-17 23:24:19,814 INFO L242 Difference]: Finished difference. Result has 347 places, 368 transitions, 4351 flow [2021-12-17 23:24:19,814 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4351, PETRI_PLACES=347, PETRI_TRANSITIONS=368} [2021-12-17 23:24:19,814 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 259 predicate places. [2021-12-17 23:24:19,815 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 368 transitions, 4351 flow [2021-12-17 23:24:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:19,815 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:19,815 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] [2021-12-17 23:24:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-12-17 23:24:19,815 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1354189522, now seen corresponding path program 155 times [2021-12-17 23:24:19,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:19,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848638818] [2021-12-17 23:24:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:19,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:20,169 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 23:24:20,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:20,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848638818] [2021-12-17 23:24:20,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848638818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:20,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:20,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:20,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801534807] [2021-12-17 23:24:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:20,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:20,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 368 transitions, 4351 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:20,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:20,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:20,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:21,410 INFO L129 PetriNetUnfolder]: 435/1216 cut-off events. [2021-12-17 23:24:21,410 INFO L130 PetriNetUnfolder]: For 22027/22027 co-relation queries the response was YES. [2021-12-17 23:24:21,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9306 conditions, 1216 events. 435/1216 cut-off events. For 22027/22027 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7190 event pairs, 72 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 9192. Up to 723 conditions per place. [2021-12-17 23:24:21,425 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 259 selfloop transitions, 179 changer transitions 22/499 dead transitions. [2021-12-17 23:24:21,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 499 transitions, 7676 flow [2021-12-17 23:24:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:24:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:24:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1970 transitions. [2021-12-17 23:24:21,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664174813110984 [2021-12-17 23:24:21,427 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1970 transitions. [2021-12-17 23:24:21,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1970 transitions. [2021-12-17 23:24:21,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:21,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1970 transitions. [2021-12-17 23:24:21,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.24324324324324) internal successors, (1970), 37 states have internal predecessors, (1970), 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 23:24:21,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:21,430 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:21,430 INFO L186 Difference]: Start difference. First operand has 347 places, 368 transitions, 4351 flow. Second operand 37 states and 1970 transitions. [2021-12-17 23:24:21,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 499 transitions, 7676 flow [2021-12-17 23:24:21,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 499 transitions, 6651 flow, removed 463 selfloop flow, removed 19 redundant places. [2021-12-17 23:24:21,538 INFO L242 Difference]: Finished difference. Result has 373 places, 449 transitions, 5743 flow [2021-12-17 23:24:21,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5743, PETRI_PLACES=373, PETRI_TRANSITIONS=449} [2021-12-17 23:24:21,538 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 285 predicate places. [2021-12-17 23:24:21,538 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 449 transitions, 5743 flow [2021-12-17 23:24:21,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:21,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:21,538 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] [2021-12-17 23:24:21,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-12-17 23:24:21,539 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2093769682, now seen corresponding path program 156 times [2021-12-17 23:24:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42876869] [2021-12-17 23:24:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:21,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:21,838 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 23:24:21,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42876869] [2021-12-17 23:24:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42876869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:21,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:21,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:21,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683523182] [2021-12-17 23:24:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:21,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:21,840 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:21,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 449 transitions, 5743 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:21,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:21,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:21,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:23,245 INFO L129 PetriNetUnfolder]: 465/1282 cut-off events. [2021-12-17 23:24:23,245 INFO L130 PetriNetUnfolder]: For 27083/27083 co-relation queries the response was YES. [2021-12-17 23:24:23,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 1282 events. 465/1282 cut-off events. For 27083/27083 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7682 event pairs, 66 based on Foata normal form. 1/1280 useless extension candidates. Maximal degree in co-relation 10122. Up to 807 conditions per place. [2021-12-17 23:24:23,263 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 303 selfloop transitions, 176 changer transitions 22/540 dead transitions. [2021-12-17 23:24:23,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 540 transitions, 8451 flow [2021-12-17 23:24:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:24:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:24:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2131 transitions. [2021-12-17 23:24:23,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667553191489362 [2021-12-17 23:24:23,265 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2131 transitions. [2021-12-17 23:24:23,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2131 transitions. [2021-12-17 23:24:23,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:23,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2131 transitions. [2021-12-17 23:24:23,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.275) internal successors, (2131), 40 states have internal predecessors, (2131), 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 23:24:23,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:23,269 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:23,269 INFO L186 Difference]: Start difference. First operand has 373 places, 449 transitions, 5743 flow. Second operand 40 states and 2131 transitions. [2021-12-17 23:24:23,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 540 transitions, 8451 flow [2021-12-17 23:24:23,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 540 transitions, 7868 flow, removed 248 selfloop flow, removed 19 redundant places. [2021-12-17 23:24:23,398 INFO L242 Difference]: Finished difference. Result has 399 places, 488 transitions, 6595 flow [2021-12-17 23:24:23,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6595, PETRI_PLACES=399, PETRI_TRANSITIONS=488} [2021-12-17 23:24:23,398 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 311 predicate places. [2021-12-17 23:24:23,399 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 488 transitions, 6595 flow [2021-12-17 23:24:23,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:23,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:23,399 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] [2021-12-17 23:24:23,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-12-17 23:24:23,399 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1710050644, now seen corresponding path program 157 times [2021-12-17 23:24:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711003517] [2021-12-17 23:24:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:23,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:23,671 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 23:24:23,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711003517] [2021-12-17 23:24:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711003517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:23,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:23,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:24:23,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35829085] [2021-12-17 23:24:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:24:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:24:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:24:23,673 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:23,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 488 transitions, 6595 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:23,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:23,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:23,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:24,808 INFO L129 PetriNetUnfolder]: 478/1324 cut-off events. [2021-12-17 23:24:24,809 INFO L130 PetriNetUnfolder]: For 29078/29078 co-relation queries the response was YES. [2021-12-17 23:24:24,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10901 conditions, 1324 events. 478/1324 cut-off events. For 29078/29078 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 8127 event pairs, 70 based on Foata normal form. 1/1322 useless extension candidates. Maximal degree in co-relation 10764. Up to 877 conditions per place. [2021-12-17 23:24:24,829 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 353 selfloop transitions, 134 changer transitions 33/559 dead transitions. [2021-12-17 23:24:24,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 559 transitions, 8752 flow [2021-12-17 23:24:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:24:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:24:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1712 transitions. [2021-12-17 23:24:24,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2021-12-17 23:24:24,831 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1712 transitions. [2021-12-17 23:24:24,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1712 transitions. [2021-12-17 23:24:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1712 transitions. [2021-12-17 23:24:24,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.5) internal successors, (1712), 32 states have internal predecessors, (1712), 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 23:24:24,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:24:24,834 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:24:24,834 INFO L186 Difference]: Start difference. First operand has 399 places, 488 transitions, 6595 flow. Second operand 32 states and 1712 transitions. [2021-12-17 23:24:24,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 559 transitions, 8752 flow [2021-12-17 23:24:24,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 559 transitions, 8158 flow, removed 269 selfloop flow, removed 13 redundant places. [2021-12-17 23:24:24,988 INFO L242 Difference]: Finished difference. Result has 421 places, 502 transitions, 6678 flow [2021-12-17 23:24:24,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6678, PETRI_PLACES=421, PETRI_TRANSITIONS=502} [2021-12-17 23:24:24,988 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 333 predicate places. [2021-12-17 23:24:24,989 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 502 transitions, 6678 flow [2021-12-17 23:24:24,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:24,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:24,989 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] [2021-12-17 23:24:24,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-12-17 23:24:24,989 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1900191726, now seen corresponding path program 158 times [2021-12-17 23:24:24,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:24,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736865090] [2021-12-17 23:24:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:24,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:25,245 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 23:24:25,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:25,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736865090] [2021-12-17 23:24:25,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736865090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:25,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:25,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-17 23:24:25,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506622441] [2021-12-17 23:24:25,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:25,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 23:24:25,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:25,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 23:24:25,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:24:25,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:25,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 502 transitions, 6678 flow. Second operand has 17 states, 17 states have (on average 51.35294117647059) internal successors, (873), 17 states have internal predecessors, (873), 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 23:24:25,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:25,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:25,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:26,333 INFO L129 PetriNetUnfolder]: 492/1363 cut-off events. [2021-12-17 23:24:26,333 INFO L130 PetriNetUnfolder]: For 31677/31677 co-relation queries the response was YES. [2021-12-17 23:24:26,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 1363 events. 492/1363 cut-off events. For 31677/31677 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 8477 event pairs, 67 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 11195. Up to 976 conditions per place. [2021-12-17 23:24:26,354 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 85 changer transitions 29/575 dead transitions. [2021-12-17 23:24:26,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 575 transitions, 8850 flow [2021-12-17 23:24:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 23:24:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-17 23:24:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1514 transitions. [2021-12-17 23:24:26,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5752279635258358 [2021-12-17 23:24:26,356 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1514 transitions. [2021-12-17 23:24:26,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1514 transitions. [2021-12-17 23:24:26,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:26,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1514 transitions. [2021-12-17 23:24:26,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.07142857142857) internal successors, (1514), 28 states have internal predecessors, (1514), 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 23:24:26,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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 23:24:26,358 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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 23:24:26,358 INFO L186 Difference]: Start difference. First operand has 421 places, 502 transitions, 6678 flow. Second operand 28 states and 1514 transitions. [2021-12-17 23:24:26,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 575 transitions, 8850 flow [2021-12-17 23:24:26,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 575 transitions, 8449 flow, removed 101 selfloop flow, removed 28 redundant places. [2021-12-17 23:24:26,524 INFO L242 Difference]: Finished difference. Result has 425 places, 521 transitions, 6912 flow [2021-12-17 23:24:26,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6319, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6912, PETRI_PLACES=425, PETRI_TRANSITIONS=521} [2021-12-17 23:24:26,525 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 337 predicate places. [2021-12-17 23:24:26,525 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 521 transitions, 6912 flow [2021-12-17 23:24:26,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 51.35294117647059) internal successors, (873), 17 states have internal predecessors, (873), 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 23:24:26,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:26,525 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] [2021-12-17 23:24:26,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-12-17 23:24:26,525 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:26,525 INFO L85 PathProgramCache]: Analyzing trace with hash 484789628, now seen corresponding path program 159 times [2021-12-17 23:24:26,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:26,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61695951] [2021-12-17 23:24:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:26,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:26,785 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 23:24:26,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61695951] [2021-12-17 23:24:26,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61695951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:26,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:26,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:26,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031240922] [2021-12-17 23:24:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:26,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:26,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:26,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:26,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 521 transitions, 6912 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:26,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:26,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:26,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:28,093 INFO L129 PetriNetUnfolder]: 494/1378 cut-off events. [2021-12-17 23:24:28,093 INFO L130 PetriNetUnfolder]: For 32866/32866 co-relation queries the response was YES. [2021-12-17 23:24:28,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11543 conditions, 1378 events. 494/1378 cut-off events. For 32866/32866 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8658 event pairs, 74 based on Foata normal form. 1/1375 useless extension candidates. Maximal degree in co-relation 11394. Up to 911 conditions per place. [2021-12-17 23:24:28,115 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 367 selfloop transitions, 147 changer transitions 34/587 dead transitions. [2021-12-17 23:24:28,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 587 transitions, 9134 flow [2021-12-17 23:24:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:24:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:24:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1966 transitions. [2021-12-17 23:24:28,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5652673950546291 [2021-12-17 23:24:28,117 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1966 transitions. [2021-12-17 23:24:28,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1966 transitions. [2021-12-17 23:24:28,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:28,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1966 transitions. [2021-12-17 23:24:28,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.13513513513514) internal successors, (1966), 37 states have internal predecessors, (1966), 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 23:24:28,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:28,124 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:28,124 INFO L186 Difference]: Start difference. First operand has 425 places, 521 transitions, 6912 flow. Second operand 37 states and 1966 transitions. [2021-12-17 23:24:28,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 587 transitions, 9134 flow [2021-12-17 23:24:28,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 587 transitions, 8841 flow, removed 119 selfloop flow, removed 16 redundant places. [2021-12-17 23:24:28,300 INFO L242 Difference]: Finished difference. Result has 450 places, 530 transitions, 7268 flow [2021-12-17 23:24:28,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6649, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7268, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2021-12-17 23:24:28,300 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 362 predicate places. [2021-12-17 23:24:28,301 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7268 flow [2021-12-17 23:24:28,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:28,301 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:28,301 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] [2021-12-17 23:24:28,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-12-17 23:24:28,301 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1367968406, now seen corresponding path program 160 times [2021-12-17 23:24:28,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:28,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767085728] [2021-12-17 23:24:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:28,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:28,564 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 23:24:28,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767085728] [2021-12-17 23:24:28,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767085728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:28,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:28,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:24:28,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648725690] [2021-12-17 23:24:28,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:28,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:24:28,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:24:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:24:28,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:28,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7268 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:28,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:28,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:28,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:29,788 INFO L129 PetriNetUnfolder]: 495/1400 cut-off events. [2021-12-17 23:24:29,788 INFO L130 PetriNetUnfolder]: For 33996/33996 co-relation queries the response was YES. [2021-12-17 23:24:29,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11759 conditions, 1400 events. 495/1400 cut-off events. For 33996/33996 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8921 event pairs, 85 based on Foata normal form. 1/1398 useless extension candidates. Maximal degree in co-relation 11603. Up to 984 conditions per place. [2021-12-17 23:24:29,813 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 101 changer transitions 29/591 dead transitions. [2021-12-17 23:24:29,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 591 transitions, 9346 flow [2021-12-17 23:24:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:24:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:24:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1717 transitions. [2021-12-17 23:24:29,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.570811170212766 [2021-12-17 23:24:29,814 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1717 transitions. [2021-12-17 23:24:29,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1717 transitions. [2021-12-17 23:24:29,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:29,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1717 transitions. [2021-12-17 23:24:29,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.65625) internal successors, (1717), 32 states have internal predecessors, (1717), 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 23:24:29,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:24:29,817 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:24:29,817 INFO L186 Difference]: Start difference. First operand has 450 places, 530 transitions, 7268 flow. Second operand 32 states and 1717 transitions. [2021-12-17 23:24:29,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 591 transitions, 9346 flow [2021-12-17 23:24:30,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 591 transitions, 8920 flow, removed 123 selfloop flow, removed 28 redundant places. [2021-12-17 23:24:30,011 INFO L242 Difference]: Finished difference. Result has 455 places, 543 transitions, 7418 flow [2021-12-17 23:24:30,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7418, PETRI_PLACES=455, PETRI_TRANSITIONS=543} [2021-12-17 23:24:30,012 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 367 predicate places. [2021-12-17 23:24:30,012 INFO L470 AbstractCegarLoop]: Abstraction has has 455 places, 543 transitions, 7418 flow [2021-12-17 23:24:30,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:24:30,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:30,012 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] [2021-12-17 23:24:30,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-12-17 23:24:30,012 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash 76891534, now seen corresponding path program 161 times [2021-12-17 23:24:30,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:30,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097323227] [2021-12-17 23:24:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:30,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:30,285 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 23:24:30,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:30,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097323227] [2021-12-17 23:24:30,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097323227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:30,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:30,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:30,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202227740] [2021-12-17 23:24:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:30,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:30,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:30,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:30,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 543 transitions, 7418 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:30,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:30,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:30,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:31,577 INFO L129 PetriNetUnfolder]: 499/1415 cut-off events. [2021-12-17 23:24:31,577 INFO L130 PetriNetUnfolder]: For 34726/34726 co-relation queries the response was YES. [2021-12-17 23:24:31,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11946 conditions, 1415 events. 499/1415 cut-off events. For 34726/34726 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 9042 event pairs, 82 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 11789. Up to 988 conditions per place. [2021-12-17 23:24:31,599 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 422 selfloop transitions, 111 changer transitions 30/602 dead transitions. [2021-12-17 23:24:31,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 602 transitions, 9594 flow [2021-12-17 23:24:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:24:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:24:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1969 transitions. [2021-12-17 23:24:31,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566129959746981 [2021-12-17 23:24:31,601 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1969 transitions. [2021-12-17 23:24:31,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1969 transitions. [2021-12-17 23:24:31,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:31,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1969 transitions. [2021-12-17 23:24:31,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.21621621621622) internal successors, (1969), 37 states have internal predecessors, (1969), 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 23:24:31,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:31,604 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:24:31,604 INFO L186 Difference]: Start difference. First operand has 455 places, 543 transitions, 7418 flow. Second operand 37 states and 1969 transitions. [2021-12-17 23:24:31,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 602 transitions, 9594 flow [2021-12-17 23:24:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 602 transitions, 9238 flow, removed 107 selfloop flow, removed 26 redundant places. [2021-12-17 23:24:31,783 INFO L242 Difference]: Finished difference. Result has 471 places, 553 transitions, 7669 flow [2021-12-17 23:24:31,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7105, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7669, PETRI_PLACES=471, PETRI_TRANSITIONS=553} [2021-12-17 23:24:31,783 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-12-17 23:24:31,783 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 553 transitions, 7669 flow [2021-12-17 23:24:31,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:31,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:31,784 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] [2021-12-17 23:24:31,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-12-17 23:24:31,784 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1872468522, now seen corresponding path program 162 times [2021-12-17 23:24:31,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54043974] [2021-12-17 23:24:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:31,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:32,110 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 23:24:32,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54043974] [2021-12-17 23:24:32,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54043974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:32,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:32,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:24:32,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645012055] [2021-12-17 23:24:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:32,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:24:32,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:24:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:24:32,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:32,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 553 transitions, 7669 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:32,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:32,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:32,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:33,914 INFO L129 PetriNetUnfolder]: 609/1724 cut-off events. [2021-12-17 23:24:33,914 INFO L130 PetriNetUnfolder]: For 46199/46199 co-relation queries the response was YES. [2021-12-17 23:24:33,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15090 conditions, 1724 events. 609/1724 cut-off events. For 46199/46199 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11719 event pairs, 58 based on Foata normal form. 1/1722 useless extension candidates. Maximal degree in co-relation 14927. Up to 1022 conditions per place. [2021-12-17 23:24:33,937 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 427 selfloop transitions, 291 changer transitions 21/778 dead transitions. [2021-12-17 23:24:33,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 778 transitions, 13245 flow [2021-12-17 23:24:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 23:24:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-17 23:24:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2481 transitions. [2021-12-17 23:24:33,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5615663196016297 [2021-12-17 23:24:33,939 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2481 transitions. [2021-12-17 23:24:33,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2481 transitions. [2021-12-17 23:24:33,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:33,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2481 transitions. [2021-12-17 23:24:33,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.787234042553195) internal successors, (2481), 47 states have internal predecessors, (2481), 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 23:24:33,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:24:33,943 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:24:33,943 INFO L186 Difference]: Start difference. First operand has 471 places, 553 transitions, 7669 flow. Second operand 47 states and 2481 transitions. [2021-12-17 23:24:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 778 transitions, 13245 flow [2021-12-17 23:24:34,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 778 transitions, 12814 flow, removed 134 selfloop flow, removed 27 redundant places. [2021-12-17 23:24:34,159 INFO L242 Difference]: Finished difference. Result has 503 places, 727 transitions, 11662 flow [2021-12-17 23:24:34,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7307, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=11662, PETRI_PLACES=503, PETRI_TRANSITIONS=727} [2021-12-17 23:24:34,159 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 415 predicate places. [2021-12-17 23:24:34,159 INFO L470 AbstractCegarLoop]: Abstraction has has 503 places, 727 transitions, 11662 flow [2021-12-17 23:24:34,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:34,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:34,160 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] [2021-12-17 23:24:34,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-12-17 23:24:34,160 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash 611338446, now seen corresponding path program 163 times [2021-12-17 23:24:34,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:34,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29036531] [2021-12-17 23:24:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:34,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:34,400 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 23:24:34,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29036531] [2021-12-17 23:24:34,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29036531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:34,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073327646] [2021-12-17 23:24:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:34,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:34,401 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:34,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 727 transitions, 11662 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:34,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:34,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:34,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:35,858 INFO L129 PetriNetUnfolder]: 610/1746 cut-off events. [2021-12-17 23:24:35,858 INFO L130 PetriNetUnfolder]: For 51716/51716 co-relation queries the response was YES. [2021-12-17 23:24:35,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16097 conditions, 1746 events. 610/1746 cut-off events. For 51716/51716 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12075 event pairs, 59 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 15922. Up to 1273 conditions per place. [2021-12-17 23:24:35,891 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 600 selfloop transitions, 97 changer transitions 35/771 dead transitions. [2021-12-17 23:24:35,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 771 transitions, 13747 flow [2021-12-17 23:24:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1813 transitions. [2021-12-17 23:24:35,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5672715894868585 [2021-12-17 23:24:35,893 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1813 transitions. [2021-12-17 23:24:35,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1813 transitions. [2021-12-17 23:24:35,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:35,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1813 transitions. [2021-12-17 23:24:35,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.3235294117647) internal successors, (1813), 34 states have internal predecessors, (1813), 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 23:24:35,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:35,896 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:35,896 INFO L186 Difference]: Start difference. First operand has 503 places, 727 transitions, 11662 flow. Second operand 34 states and 1813 transitions. [2021-12-17 23:24:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 771 transitions, 13747 flow [2021-12-17 23:24:36,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 771 transitions, 12787 flow, removed 421 selfloop flow, removed 19 redundant places. [2021-12-17 23:24:36,225 INFO L242 Difference]: Finished difference. Result has 522 places, 720 transitions, 10913 flow [2021-12-17 23:24:36,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10710, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10913, PETRI_PLACES=522, PETRI_TRANSITIONS=720} [2021-12-17 23:24:36,225 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 434 predicate places. [2021-12-17 23:24:36,226 INFO L470 AbstractCegarLoop]: Abstraction has has 522 places, 720 transitions, 10913 flow [2021-12-17 23:24:36,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:36,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:36,226 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] [2021-12-17 23:24:36,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-12-17 23:24:36,226 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash -171078592, now seen corresponding path program 164 times [2021-12-17 23:24:36,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:36,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094474300] [2021-12-17 23:24:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:36,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:36,480 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 23:24:36,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094474300] [2021-12-17 23:24:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094474300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:36,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:36,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:36,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997079399] [2021-12-17 23:24:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:36,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:36,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:36,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:36,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 720 transitions, 10913 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:36,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:36,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:36,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:37,858 INFO L129 PetriNetUnfolder]: 604/1752 cut-off events. [2021-12-17 23:24:37,858 INFO L130 PetriNetUnfolder]: For 49721/49721 co-relation queries the response was YES. [2021-12-17 23:24:37,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15499 conditions, 1752 events. 604/1752 cut-off events. For 49721/49721 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12127 event pairs, 66 based on Foata normal form. 1/1750 useless extension candidates. Maximal degree in co-relation 15314. Up to 1193 conditions per place. [2021-12-17 23:24:37,892 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 545 selfloop transitions, 141 changer transitions 40/765 dead transitions. [2021-12-17 23:24:37,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 765 transitions, 12975 flow [2021-12-17 23:24:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1809 transitions. [2021-12-17 23:24:37,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5660200250312891 [2021-12-17 23:24:37,894 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1809 transitions. [2021-12-17 23:24:37,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1809 transitions. [2021-12-17 23:24:37,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:37,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1809 transitions. [2021-12-17 23:24:37,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.205882352941174) internal successors, (1809), 34 states have internal predecessors, (1809), 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 23:24:37,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:37,897 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:37,897 INFO L186 Difference]: Start difference. First operand has 522 places, 720 transitions, 10913 flow. Second operand 34 states and 1809 transitions. [2021-12-17 23:24:37,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 765 transitions, 12975 flow [2021-12-17 23:24:38,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 765 transitions, 12615 flow, removed 57 selfloop flow, removed 36 redundant places. [2021-12-17 23:24:38,195 INFO L242 Difference]: Finished difference. Result has 516 places, 707 transitions, 10836 flow [2021-12-17 23:24:38,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10573, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10836, PETRI_PLACES=516, PETRI_TRANSITIONS=707} [2021-12-17 23:24:38,196 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 428 predicate places. [2021-12-17 23:24:38,196 INFO L470 AbstractCegarLoop]: Abstraction has has 516 places, 707 transitions, 10836 flow [2021-12-17 23:24:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:38,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:38,196 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] [2021-12-17 23:24:38,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-12-17 23:24:38,196 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1016489154, now seen corresponding path program 165 times [2021-12-17 23:24:38,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979115382] [2021-12-17 23:24:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:38,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:38,460 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 23:24:38,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979115382] [2021-12-17 23:24:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979115382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:38,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:38,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:38,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293515655] [2021-12-17 23:24:38,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:38,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:38,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:38,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:38,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 707 transitions, 10836 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:38,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:38,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:38,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:40,099 INFO L129 PetriNetUnfolder]: 601/1749 cut-off events. [2021-12-17 23:24:40,099 INFO L130 PetriNetUnfolder]: For 49767/49767 co-relation queries the response was YES. [2021-12-17 23:24:40,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15598 conditions, 1749 events. 601/1749 cut-off events. For 49767/49767 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12160 event pairs, 57 based on Foata normal form. 1/1747 useless extension candidates. Maximal degree in co-relation 15416. Up to 1146 conditions per place. [2021-12-17 23:24:40,128 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 540 selfloop transitions, 169 changer transitions 34/782 dead transitions. [2021-12-17 23:24:40,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 782 transitions, 13746 flow [2021-12-17 23:24:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:24:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:24:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2122 transitions. [2021-12-17 23:24:40,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5643617021276596 [2021-12-17 23:24:40,129 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2122 transitions. [2021-12-17 23:24:40,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2122 transitions. [2021-12-17 23:24:40,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:40,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2122 transitions. [2021-12-17 23:24:40,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.05) internal successors, (2122), 40 states have internal predecessors, (2122), 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 23:24:40,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:40,133 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:24:40,133 INFO L186 Difference]: Start difference. First operand has 516 places, 707 transitions, 10836 flow. Second operand 40 states and 2122 transitions. [2021-12-17 23:24:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 782 transitions, 13746 flow [2021-12-17 23:24:40,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 782 transitions, 13305 flow, removed 36 selfloop flow, removed 34 redundant places. [2021-12-17 23:24:40,399 INFO L242 Difference]: Finished difference. Result has 517 places, 714 transitions, 11066 flow [2021-12-17 23:24:40,400 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11066, PETRI_PLACES=517, PETRI_TRANSITIONS=714} [2021-12-17 23:24:40,400 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 429 predicate places. [2021-12-17 23:24:40,400 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 714 transitions, 11066 flow [2021-12-17 23:24:40,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:40,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:40,401 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] [2021-12-17 23:24:40,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-12-17 23:24:40,401 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1024782626, now seen corresponding path program 166 times [2021-12-17 23:24:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190082531] [2021-12-17 23:24:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:40,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:40,710 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 23:24:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:40,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190082531] [2021-12-17 23:24:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190082531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:40,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:40,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:24:40,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348013292] [2021-12-17 23:24:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:40,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:24:40,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:24:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:24:40,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:40,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 714 transitions, 11066 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:40,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:40,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:40,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:42,524 INFO L129 PetriNetUnfolder]: 634/1867 cut-off events. [2021-12-17 23:24:42,524 INFO L130 PetriNetUnfolder]: For 57950/57950 co-relation queries the response was YES. [2021-12-17 23:24:42,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16957 conditions, 1867 events. 634/1867 cut-off events. For 57950/57950 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13348 event pairs, 47 based on Foata normal form. 1/1865 useless extension candidates. Maximal degree in co-relation 16777. Up to 919 conditions per place. [2021-12-17 23:24:42,559 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 306 selfloop transitions, 454 changer transitions 25/824 dead transitions. [2021-12-17 23:24:42,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 824 transitions, 15239 flow [2021-12-17 23:24:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 23:24:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-17 23:24:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2484 transitions. [2021-12-17 23:24:42,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622453598913536 [2021-12-17 23:24:42,561 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2484 transitions. [2021-12-17 23:24:42,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2484 transitions. [2021-12-17 23:24:42,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:42,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2484 transitions. [2021-12-17 23:24:42,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.851063829787236) internal successors, (2484), 47 states have internal predecessors, (2484), 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 23:24:42,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:24:42,628 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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 23:24:42,628 INFO L186 Difference]: Start difference. First operand has 517 places, 714 transitions, 11066 flow. Second operand 47 states and 2484 transitions. [2021-12-17 23:24:42,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 824 transitions, 15239 flow [2021-12-17 23:24:42,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 824 transitions, 14736 flow, removed 165 selfloop flow, removed 33 redundant places. [2021-12-17 23:24:42,935 INFO L242 Difference]: Finished difference. Result has 538 places, 767 transitions, 13619 flow [2021-12-17 23:24:42,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10763, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13619, PETRI_PLACES=538, PETRI_TRANSITIONS=767} [2021-12-17 23:24:42,935 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 450 predicate places. [2021-12-17 23:24:42,935 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 767 transitions, 13619 flow [2021-12-17 23:24:42,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:42,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:42,936 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] [2021-12-17 23:24:42,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-12-17 23:24:42,936 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1889691986, now seen corresponding path program 167 times [2021-12-17 23:24:42,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:42,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611664358] [2021-12-17 23:24:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:42,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:43,236 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 23:24:43,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611664358] [2021-12-17 23:24:43,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611664358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:43,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:43,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:24:43,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209051122] [2021-12-17 23:24:43,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:43,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:24:43,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:43,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:24:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:24:43,238 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:43,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 767 transitions, 13619 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:43,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:43,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:43,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:46,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:24:47,155 INFO L129 PetriNetUnfolder]: 638/1872 cut-off events. [2021-12-17 23:24:47,155 INFO L130 PetriNetUnfolder]: For 63706/63706 co-relation queries the response was YES. [2021-12-17 23:24:47,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18161 conditions, 1872 events. 638/1872 cut-off events. For 63706/63706 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13484 event pairs, 45 based on Foata normal form. 1/1870 useless extension candidates. Maximal degree in co-relation 17972. Up to 1256 conditions per place. [2021-12-17 23:24:47,190 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 557 selfloop transitions, 206 changer transitions 41/843 dead transitions. [2021-12-17 23:24:47,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 843 transitions, 16667 flow [2021-12-17 23:24:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:24:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-17 23:24:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2322 transitions. [2021-12-17 23:24:47,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.561411992263056 [2021-12-17 23:24:47,192 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2322 transitions. [2021-12-17 23:24:47,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2322 transitions. [2021-12-17 23:24:47,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:47,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2322 transitions. [2021-12-17 23:24:47,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.77272727272727) internal successors, (2322), 44 states have internal predecessors, (2322), 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 23:24:47,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:24:47,196 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:24:47,196 INFO L186 Difference]: Start difference. First operand has 538 places, 767 transitions, 13619 flow. Second operand 44 states and 2322 transitions. [2021-12-17 23:24:47,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 843 transitions, 16667 flow [2021-12-17 23:24:47,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 843 transitions, 15906 flow, removed 302 selfloop flow, removed 26 redundant places. [2021-12-17 23:24:47,671 INFO L242 Difference]: Finished difference. Result has 565 places, 787 transitions, 13889 flow [2021-12-17 23:24:47,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=12926, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13889, PETRI_PLACES=565, PETRI_TRANSITIONS=787} [2021-12-17 23:24:47,672 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 477 predicate places. [2021-12-17 23:24:47,672 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 787 transitions, 13889 flow [2021-12-17 23:24:47,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:24:47,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:47,672 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] [2021-12-17 23:24:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-12-17 23:24:47,673 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash -951966324, now seen corresponding path program 168 times [2021-12-17 23:24:47,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554877270] [2021-12-17 23:24:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:47,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:47,925 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 23:24:47,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554877270] [2021-12-17 23:24:47,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554877270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:47,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:47,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:47,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926180621] [2021-12-17 23:24:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:47,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:47,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:47,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:47,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 787 transitions, 13889 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:47,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:47,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:47,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:49,506 INFO L129 PetriNetUnfolder]: 636/1890 cut-off events. [2021-12-17 23:24:49,506 INFO L130 PetriNetUnfolder]: For 63645/63645 co-relation queries the response was YES. [2021-12-17 23:24:49,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18335 conditions, 1890 events. 636/1890 cut-off events. For 63645/63645 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13683 event pairs, 64 based on Foata normal form. 1/1888 useless extension candidates. Maximal degree in co-relation 18133. Up to 1346 conditions per place. [2021-12-17 23:24:49,545 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 641 selfloop transitions, 135 changer transitions 34/849 dead transitions. [2021-12-17 23:24:49,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 849 transitions, 16745 flow [2021-12-17 23:24:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:24:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:24:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1912 transitions. [2021-12-17 23:24:49,547 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2021-12-17 23:24:49,547 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1912 transitions. [2021-12-17 23:24:49,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1912 transitions. [2021-12-17 23:24:49,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:49,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1912 transitions. [2021-12-17 23:24:49,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.111111111111114) internal successors, (1912), 36 states have internal predecessors, (1912), 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 23:24:49,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:24:49,551 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:24:49,551 INFO L186 Difference]: Start difference. First operand has 565 places, 787 transitions, 13889 flow. Second operand 36 states and 1912 transitions. [2021-12-17 23:24:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 849 transitions, 16745 flow [2021-12-17 23:24:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 849 transitions, 16057 flow, removed 111 selfloop flow, removed 43 redundant places. [2021-12-17 23:24:50,027 INFO L242 Difference]: Finished difference. Result has 561 places, 798 transitions, 13967 flow [2021-12-17 23:24:50,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=13279, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13967, PETRI_PLACES=561, PETRI_TRANSITIONS=798} [2021-12-17 23:24:50,028 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 473 predicate places. [2021-12-17 23:24:50,028 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 798 transitions, 13967 flow [2021-12-17 23:24:50,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:50,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:50,028 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] [2021-12-17 23:24:50,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-12-17 23:24:50,028 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1230467732, now seen corresponding path program 169 times [2021-12-17 23:24:50,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:50,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263063277] [2021-12-17 23:24:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:50,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:50,335 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 23:24:50,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263063277] [2021-12-17 23:24:50,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263063277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:50,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:50,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:50,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629325480] [2021-12-17 23:24:50,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:50,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:50,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:50,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:50,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 798 transitions, 13967 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:50,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:50,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:50,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:52,005 INFO L129 PetriNetUnfolder]: 653/1925 cut-off events. [2021-12-17 23:24:52,005 INFO L130 PetriNetUnfolder]: For 62773/62773 co-relation queries the response was YES. [2021-12-17 23:24:52,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18532 conditions, 1925 events. 653/1925 cut-off events. For 62773/62773 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13941 event pairs, 52 based on Foata normal form. 1/1923 useless extension candidates. Maximal degree in co-relation 18332. Up to 1409 conditions per place. [2021-12-17 23:24:52,048 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 712 selfloop transitions, 105 changer transitions 20/876 dead transitions. [2021-12-17 23:24:52,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 876 transitions, 17431 flow [2021-12-17 23:24:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:24:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:24:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1821 transitions. [2021-12-17 23:24:52,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5697747183979975 [2021-12-17 23:24:52,050 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1821 transitions. [2021-12-17 23:24:52,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1821 transitions. [2021-12-17 23:24:52,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:52,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1821 transitions. [2021-12-17 23:24:52,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.55882352941177) internal successors, (1821), 34 states have internal predecessors, (1821), 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 23:24:52,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:52,053 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:24:52,053 INFO L186 Difference]: Start difference. First operand has 561 places, 798 transitions, 13967 flow. Second operand 34 states and 1821 transitions. [2021-12-17 23:24:52,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 876 transitions, 17431 flow [2021-12-17 23:24:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 876 transitions, 17054 flow, removed 96 selfloop flow, removed 31 redundant places. [2021-12-17 23:24:52,526 INFO L242 Difference]: Finished difference. Result has 562 places, 830 transitions, 14854 flow [2021-12-17 23:24:52,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=13674, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14854, PETRI_PLACES=562, PETRI_TRANSITIONS=830} [2021-12-17 23:24:52,527 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 474 predicate places. [2021-12-17 23:24:52,527 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 830 transitions, 14854 flow [2021-12-17 23:24:52,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:52,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:52,528 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] [2021-12-17 23:24:52,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-12-17 23:24:52,528 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1300904596, now seen corresponding path program 170 times [2021-12-17 23:24:52,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638447914] [2021-12-17 23:24:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:52,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:52,823 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 23:24:52,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:52,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638447914] [2021-12-17 23:24:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638447914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:52,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498272832] [2021-12-17 23:24:52,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:52,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:52,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:52,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:52,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 830 transitions, 14854 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:52,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:52,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:52,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:54,765 INFO L129 PetriNetUnfolder]: 671/1995 cut-off events. [2021-12-17 23:24:54,765 INFO L130 PetriNetUnfolder]: For 68318/68318 co-relation queries the response was YES. [2021-12-17 23:24:54,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 1995 events. 671/1995 cut-off events. For 68318/68318 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 14780 event pairs, 56 based on Foata normal form. 1/1993 useless extension candidates. Maximal degree in co-relation 19209. Up to 1271 conditions per place. [2021-12-17 23:24:54,805 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 578 selfloop transitions, 266 changer transitions 29/912 dead transitions. [2021-12-17 23:24:54,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 912 transitions, 18375 flow [2021-12-17 23:24:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:24:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 23:24:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2221 transitions. [2021-12-17 23:24:54,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625633232016211 [2021-12-17 23:24:54,807 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2221 transitions. [2021-12-17 23:24:54,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2221 transitions. [2021-12-17 23:24:54,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:54,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2221 transitions. [2021-12-17 23:24:54,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.88095238095238) internal successors, (2221), 42 states have internal predecessors, (2221), 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 23:24:54,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:24:54,811 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:24:54,811 INFO L186 Difference]: Start difference. First operand has 562 places, 830 transitions, 14854 flow. Second operand 42 states and 2221 transitions. [2021-12-17 23:24:54,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 912 transitions, 18375 flow [2021-12-17 23:24:55,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 912 transitions, 17659 flow, removed 304 selfloop flow, removed 17 redundant places. [2021-12-17 23:24:55,270 INFO L242 Difference]: Finished difference. Result has 591 places, 855 transitions, 15475 flow [2021-12-17 23:24:55,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14164, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15475, PETRI_PLACES=591, PETRI_TRANSITIONS=855} [2021-12-17 23:24:55,271 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 503 predicate places. [2021-12-17 23:24:55,271 INFO L470 AbstractCegarLoop]: Abstraction has has 591 places, 855 transitions, 15475 flow [2021-12-17 23:24:55,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:55,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:55,271 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] [2021-12-17 23:24:55,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-12-17 23:24:55,271 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1435503878, now seen corresponding path program 171 times [2021-12-17 23:24:55,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:55,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420041312] [2021-12-17 23:24:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:55,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:55,558 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 23:24:55,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420041312] [2021-12-17 23:24:55,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420041312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:55,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:55,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:55,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685114656] [2021-12-17 23:24:55,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:55,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:55,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 855 transitions, 15475 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:55,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:55,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:55,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:57,060 INFO L129 PetriNetUnfolder]: 664/1988 cut-off events. [2021-12-17 23:24:57,060 INFO L130 PetriNetUnfolder]: For 67946/67946 co-relation queries the response was YES. [2021-12-17 23:24:57,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19279 conditions, 1988 events. 664/1988 cut-off events. For 67946/67946 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 14692 event pairs, 54 based on Foata normal form. 1/1986 useless extension candidates. Maximal degree in co-relation 19072. Up to 1470 conditions per place. [2021-12-17 23:24:57,102 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 749 selfloop transitions, 92 changer transitions 22/902 dead transitions. [2021-12-17 23:24:57,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 902 transitions, 17878 flow [2021-12-17 23:24:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:24:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 23:24:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1555 transitions. [2021-12-17 23:24:57,103 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5704328686720469 [2021-12-17 23:24:57,103 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1555 transitions. [2021-12-17 23:24:57,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1555 transitions. [2021-12-17 23:24:57,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:57,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1555 transitions. [2021-12-17 23:24:57,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.62068965517241) internal successors, (1555), 29 states have internal predecessors, (1555), 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 23:24:57,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:57,106 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:24:57,106 INFO L186 Difference]: Start difference. First operand has 591 places, 855 transitions, 15475 flow. Second operand 29 states and 1555 transitions. [2021-12-17 23:24:57,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 902 transitions, 17878 flow [2021-12-17 23:24:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 902 transitions, 17422 flow, removed 102 selfloop flow, removed 35 redundant places. [2021-12-17 23:24:57,589 INFO L242 Difference]: Finished difference. Result has 587 places, 861 transitions, 15394 flow [2021-12-17 23:24:57,590 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15039, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15394, PETRI_PLACES=587, PETRI_TRANSITIONS=861} [2021-12-17 23:24:57,590 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 499 predicate places. [2021-12-17 23:24:57,590 INFO L470 AbstractCegarLoop]: Abstraction has has 587 places, 861 transitions, 15394 flow [2021-12-17 23:24:57,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:57,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:24:57,590 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] [2021-12-17 23:24:57,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-12-17 23:24:57,591 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:24:57,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:24:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash 612371180, now seen corresponding path program 172 times [2021-12-17 23:24:57,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:24:57,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080324172] [2021-12-17 23:24:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:24:57,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:24:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:24:57,894 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 23:24:57,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:24:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080324172] [2021-12-17 23:24:57,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080324172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:24:57,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:24:57,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:24:57,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656109185] [2021-12-17 23:24:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:24:57,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:24:57,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:24:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:24:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:24:57,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:24:57,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 861 transitions, 15394 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:24:57,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:24:57,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:24:57,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:24:59,624 INFO L129 PetriNetUnfolder]: 670/2018 cut-off events. [2021-12-17 23:24:59,624 INFO L130 PetriNetUnfolder]: For 68051/68051 co-relation queries the response was YES. [2021-12-17 23:24:59,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19525 conditions, 2018 events. 670/2018 cut-off events. For 68051/68051 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 15061 event pairs, 66 based on Foata normal form. 1/2016 useless extension candidates. Maximal degree in co-relation 19314. Up to 1436 conditions per place. [2021-12-17 23:24:59,661 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 704 selfloop transitions, 124 changer transitions 39/906 dead transitions. [2021-12-17 23:24:59,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 906 transitions, 18095 flow [2021-12-17 23:24:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:24:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:24:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1858 transitions. [2021-12-17 23:24:59,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564741641337386 [2021-12-17 23:24:59,663 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1858 transitions. [2021-12-17 23:24:59,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1858 transitions. [2021-12-17 23:24:59,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:24:59,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1858 transitions. [2021-12-17 23:24:59,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.08571428571429) internal successors, (1858), 35 states have internal predecessors, (1858), 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 23:24:59,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:24:59,666 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:24:59,666 INFO L186 Difference]: Start difference. First operand has 587 places, 861 transitions, 15394 flow. Second operand 35 states and 1858 transitions. [2021-12-17 23:24:59,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 906 transitions, 18095 flow [2021-12-17 23:25:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 906 transitions, 17839 flow, removed 74 selfloop flow, removed 21 redundant places. [2021-12-17 23:25:00,159 INFO L242 Difference]: Finished difference. Result has 603 places, 850 transitions, 15286 flow [2021-12-17 23:25:00,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15158, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15286, PETRI_PLACES=603, PETRI_TRANSITIONS=850} [2021-12-17 23:25:00,160 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 515 predicate places. [2021-12-17 23:25:00,160 INFO L470 AbstractCegarLoop]: Abstraction has has 603 places, 850 transitions, 15286 flow [2021-12-17 23:25:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:00,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:00,160 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] [2021-12-17 23:25:00,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-12-17 23:25:00,160 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1604591578, now seen corresponding path program 173 times [2021-12-17 23:25:00,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411768163] [2021-12-17 23:25:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:00,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:00,413 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 23:25:00,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:00,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411768163] [2021-12-17 23:25:00,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411768163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:00,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:00,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:25:00,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341387402] [2021-12-17 23:25:00,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:00,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:25:00,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:25:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:25:00,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:00,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 850 transitions, 15286 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:00,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:00,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:00,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:02,136 INFO L129 PetriNetUnfolder]: 690/2083 cut-off events. [2021-12-17 23:25:02,137 INFO L130 PetriNetUnfolder]: For 74441/74441 co-relation queries the response was YES. [2021-12-17 23:25:02,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20295 conditions, 2083 events. 690/2083 cut-off events. For 74441/74441 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 15682 event pairs, 65 based on Foata normal form. 1/2081 useless extension candidates. Maximal degree in co-relation 20080. Up to 1490 conditions per place. [2021-12-17 23:25:02,181 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 746 selfloop transitions, 136 changer transitions 21/942 dead transitions. [2021-12-17 23:25:02,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 942 transitions, 19022 flow [2021-12-17 23:25:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:25:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:25:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1873 transitions. [2021-12-17 23:25:02,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5693009118541034 [2021-12-17 23:25:02,183 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1873 transitions. [2021-12-17 23:25:02,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1873 transitions. [2021-12-17 23:25:02,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:02,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1873 transitions. [2021-12-17 23:25:02,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.51428571428571) internal successors, (1873), 35 states have internal predecessors, (1873), 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 23:25:02,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:02,186 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:02,186 INFO L186 Difference]: Start difference. First operand has 603 places, 850 transitions, 15286 flow. Second operand 35 states and 1873 transitions. [2021-12-17 23:25:02,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 942 transitions, 19022 flow [2021-12-17 23:25:02,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 942 transitions, 18576 flow, removed 98 selfloop flow, removed 34 redundant places. [2021-12-17 23:25:02,792 INFO L242 Difference]: Finished difference. Result has 605 places, 897 transitions, 16414 flow [2021-12-17 23:25:02,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14908, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16414, PETRI_PLACES=605, PETRI_TRANSITIONS=897} [2021-12-17 23:25:02,793 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 517 predicate places. [2021-12-17 23:25:02,793 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 897 transitions, 16414 flow [2021-12-17 23:25:02,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:02,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:02,793 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] [2021-12-17 23:25:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-12-17 23:25:02,794 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 639919852, now seen corresponding path program 174 times [2021-12-17 23:25:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132830933] [2021-12-17 23:25:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:02,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:03,127 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 23:25:03,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132830933] [2021-12-17 23:25:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132830933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:03,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:03,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:03,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781933039] [2021-12-17 23:25:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:03,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:03,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:03,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 897 transitions, 16414 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:03,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:03,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:03,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:05,128 INFO L129 PetriNetUnfolder]: 736/2214 cut-off events. [2021-12-17 23:25:05,128 INFO L130 PetriNetUnfolder]: For 88877/88877 co-relation queries the response was YES. [2021-12-17 23:25:05,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 2214 events. 736/2214 cut-off events. For 88877/88877 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 16991 event pairs, 51 based on Foata normal form. 1/2212 useless extension candidates. Maximal degree in co-relation 21883. Up to 1516 conditions per place. [2021-12-17 23:25:05,176 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 744 selfloop transitions, 202 changer transitions 21/1006 dead transitions. [2021-12-17 23:25:05,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 1006 transitions, 20860 flow [2021-12-17 23:25:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:25:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:25:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2130 transitions. [2021-12-17 23:25:05,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2021-12-17 23:25:05,178 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2130 transitions. [2021-12-17 23:25:05,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2130 transitions. [2021-12-17 23:25:05,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:05,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2130 transitions. [2021-12-17 23:25:05,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.25) internal successors, (2130), 40 states have internal predecessors, (2130), 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 23:25:05,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:25:05,181 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:25:05,181 INFO L186 Difference]: Start difference. First operand has 605 places, 897 transitions, 16414 flow. Second operand 40 states and 2130 transitions. [2021-12-17 23:25:05,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 1006 transitions, 20860 flow [2021-12-17 23:25:05,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1006 transitions, 20054 flow, removed 356 selfloop flow, removed 18 redundant places. [2021-12-17 23:25:05,920 INFO L242 Difference]: Finished difference. Result has 636 places, 956 transitions, 17824 flow [2021-12-17 23:25:05,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15630, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=17824, PETRI_PLACES=636, PETRI_TRANSITIONS=956} [2021-12-17 23:25:05,921 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 548 predicate places. [2021-12-17 23:25:05,921 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 956 transitions, 17824 flow [2021-12-17 23:25:05,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:05,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:05,921 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] [2021-12-17 23:25:05,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-12-17 23:25:05,921 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 73672700, now seen corresponding path program 175 times [2021-12-17 23:25:05,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:05,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520937865] [2021-12-17 23:25:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:05,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:06,178 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 23:25:06,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520937865] [2021-12-17 23:25:06,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520937865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:06,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:06,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:25:06,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856324830] [2021-12-17 23:25:06,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:06,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:25:06,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:25:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:25:06,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:06,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 956 transitions, 17824 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:06,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:06,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:06,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:08,094 INFO L129 PetriNetUnfolder]: 741/2247 cut-off events. [2021-12-17 23:25:08,094 INFO L130 PetriNetUnfolder]: For 96590/96590 co-relation queries the response was YES. [2021-12-17 23:25:08,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22845 conditions, 2247 events. 741/2247 cut-off events. For 96590/96590 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17448 event pairs, 60 based on Foata normal form. 1/2245 useless extension candidates. Maximal degree in co-relation 22615. Up to 1616 conditions per place. [2021-12-17 23:25:08,146 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 812 selfloop transitions, 138 changer transitions 25/1014 dead transitions. [2021-12-17 23:25:08,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1014 transitions, 21060 flow [2021-12-17 23:25:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:25:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:25:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1769 transitions. [2021-12-17 23:25:08,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5702772404900065 [2021-12-17 23:25:08,147 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1769 transitions. [2021-12-17 23:25:08,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1769 transitions. [2021-12-17 23:25:08,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:08,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1769 transitions. [2021-12-17 23:25:08,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.60606060606061) internal successors, (1769), 33 states have internal predecessors, (1769), 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 23:25:08,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:25:08,150 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:25:08,151 INFO L186 Difference]: Start difference. First operand has 636 places, 956 transitions, 17824 flow. Second operand 33 states and 1769 transitions. [2021-12-17 23:25:08,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1014 transitions, 21060 flow [2021-12-17 23:25:08,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1014 transitions, 20006 flow, removed 474 selfloop flow, removed 19 redundant places. [2021-12-17 23:25:08,924 INFO L242 Difference]: Finished difference. Result has 653 places, 967 transitions, 17537 flow [2021-12-17 23:25:08,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16832, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17537, PETRI_PLACES=653, PETRI_TRANSITIONS=967} [2021-12-17 23:25:08,926 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 565 predicate places. [2021-12-17 23:25:08,926 INFO L470 AbstractCegarLoop]: Abstraction has has 653 places, 967 transitions, 17537 flow [2021-12-17 23:25:08,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:08,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:08,926 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] [2021-12-17 23:25:08,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-12-17 23:25:08,927 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1563029082, now seen corresponding path program 176 times [2021-12-17 23:25:08,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:08,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983367881] [2021-12-17 23:25:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:08,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:09,192 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 23:25:09,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983367881] [2021-12-17 23:25:09,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983367881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:09,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:09,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:09,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775916523] [2021-12-17 23:25:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:09,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:09,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:09,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:09,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:09,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 967 transitions, 17537 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:09,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:09,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:09,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:11,219 INFO L129 PetriNetUnfolder]: 761/2299 cut-off events. [2021-12-17 23:25:11,219 INFO L130 PetriNetUnfolder]: For 99596/99596 co-relation queries the response was YES. [2021-12-17 23:25:11,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 2299 events. 761/2299 cut-off events. For 99596/99596 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17961 event pairs, 62 based on Foata normal form. 1/2297 useless extension candidates. Maximal degree in co-relation 23119. Up to 1699 conditions per place. [2021-12-17 23:25:11,274 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 868 selfloop transitions, 121 changer transitions 20/1048 dead transitions. [2021-12-17 23:25:11,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 1048 transitions, 21645 flow [2021-12-17 23:25:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:25:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:25:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2075 transitions. [2021-12-17 23:25:11,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5660120021822149 [2021-12-17 23:25:11,277 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2075 transitions. [2021-12-17 23:25:11,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2075 transitions. [2021-12-17 23:25:11,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:11,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2075 transitions. [2021-12-17 23:25:11,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.205128205128204) internal successors, (2075), 39 states have internal predecessors, (2075), 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 23:25:11,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:25:11,282 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:25:11,282 INFO L186 Difference]: Start difference. First operand has 653 places, 967 transitions, 17537 flow. Second operand 39 states and 2075 transitions. [2021-12-17 23:25:11,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 1048 transitions, 21645 flow [2021-12-17 23:25:12,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 1048 transitions, 21218 flow, removed 141 selfloop flow, removed 27 redundant places. [2021-12-17 23:25:12,078 INFO L242 Difference]: Finished difference. Result has 669 places, 1004 transitions, 18622 flow [2021-12-17 23:25:12,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17197, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=18622, PETRI_PLACES=669, PETRI_TRANSITIONS=1004} [2021-12-17 23:25:12,079 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 581 predicate places. [2021-12-17 23:25:12,079 INFO L470 AbstractCegarLoop]: Abstraction has has 669 places, 1004 transitions, 18622 flow [2021-12-17 23:25:12,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:12,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:12,079 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] [2021-12-17 23:25:12,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-12-17 23:25:12,079 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 962640160, now seen corresponding path program 177 times [2021-12-17 23:25:12,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:12,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333449937] [2021-12-17 23:25:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:12,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:12,351 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 23:25:12,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333449937] [2021-12-17 23:25:12,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333449937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:12,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:12,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096860146] [2021-12-17 23:25:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:12,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:12,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:12,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1004 transitions, 18622 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:12,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:12,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:12,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:14,380 INFO L129 PetriNetUnfolder]: 783/2378 cut-off events. [2021-12-17 23:25:14,380 INFO L130 PetriNetUnfolder]: For 111292/111292 co-relation queries the response was YES. [2021-12-17 23:25:14,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24649 conditions, 2378 events. 783/2378 cut-off events. For 111292/111292 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 18747 event pairs, 62 based on Foata normal form. 1/2376 useless extension candidates. Maximal degree in co-relation 24405. Up to 1682 conditions per place. [2021-12-17 23:25:14,438 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 843 selfloop transitions, 176 changer transitions 22/1080 dead transitions. [2021-12-17 23:25:14,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1080 transitions, 22890 flow [2021-12-17 23:25:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:25:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:25:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2128 transitions. [2021-12-17 23:25:14,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2021-12-17 23:25:14,440 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2128 transitions. [2021-12-17 23:25:14,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2128 transitions. [2021-12-17 23:25:14,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:14,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2128 transitions. [2021-12-17 23:25:14,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.2) internal successors, (2128), 40 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:25:14,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:25:14,443 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:25:14,443 INFO L186 Difference]: Start difference. First operand has 669 places, 1004 transitions, 18622 flow. Second operand 40 states and 2128 transitions. [2021-12-17 23:25:14,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1080 transitions, 22890 flow [2021-12-17 23:25:15,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 1080 transitions, 22131 flow, removed 326 selfloop flow, removed 17 redundant places. [2021-12-17 23:25:15,267 INFO L242 Difference]: Finished difference. Result has 696 places, 1035 transitions, 19574 flow [2021-12-17 23:25:15,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17870, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19574, PETRI_PLACES=696, PETRI_TRANSITIONS=1035} [2021-12-17 23:25:15,268 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 608 predicate places. [2021-12-17 23:25:15,268 INFO L470 AbstractCegarLoop]: Abstraction has has 696 places, 1035 transitions, 19574 flow [2021-12-17 23:25:15,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:15,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:15,268 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] [2021-12-17 23:25:15,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-12-17 23:25:15,268 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -479920002, now seen corresponding path program 178 times [2021-12-17 23:25:15,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:15,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341038813] [2021-12-17 23:25:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:15,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:15,564 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 23:25:15,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:15,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341038813] [2021-12-17 23:25:15,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341038813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:15,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:15,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:15,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580475045] [2021-12-17 23:25:15,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:15,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:15,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:15,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:15,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1035 transitions, 19574 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:15,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:15,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:15,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:17,585 INFO L129 PetriNetUnfolder]: 793/2411 cut-off events. [2021-12-17 23:25:17,585 INFO L130 PetriNetUnfolder]: For 123459/123459 co-relation queries the response was YES. [2021-12-17 23:25:17,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25343 conditions, 2411 events. 793/2411 cut-off events. For 123459/123459 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 19094 event pairs, 65 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 25089. Up to 1769 conditions per place. [2021-12-17 23:25:17,636 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 922 selfloop transitions, 104 changer transitions 30/1095 dead transitions. [2021-12-17 23:25:17,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1095 transitions, 22998 flow [2021-12-17 23:25:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:25:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:25:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1803 transitions. [2021-12-17 23:25:17,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564142678347935 [2021-12-17 23:25:17,638 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1803 transitions. [2021-12-17 23:25:17,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1803 transitions. [2021-12-17 23:25:17,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:17,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1803 transitions. [2021-12-17 23:25:17,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.029411764705884) internal successors, (1803), 34 states have internal predecessors, (1803), 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 23:25:17,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:25:17,641 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:25:17,641 INFO L186 Difference]: Start difference. First operand has 696 places, 1035 transitions, 19574 flow. Second operand 34 states and 1803 transitions. [2021-12-17 23:25:17,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1095 transitions, 22998 flow [2021-12-17 23:25:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 1095 transitions, 21989 flow, removed 456 selfloop flow, removed 17 redundant places. [2021-12-17 23:25:18,615 INFO L242 Difference]: Finished difference. Result has 720 places, 1047 transitions, 19182 flow [2021-12-17 23:25:18,616 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18569, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19182, PETRI_PLACES=720, PETRI_TRANSITIONS=1047} [2021-12-17 23:25:18,616 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 632 predicate places. [2021-12-17 23:25:18,616 INFO L470 AbstractCegarLoop]: Abstraction has has 720 places, 1047 transitions, 19182 flow [2021-12-17 23:25:18,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:18,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:18,616 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] [2021-12-17 23:25:18,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-12-17 23:25:18,617 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2011354558, now seen corresponding path program 179 times [2021-12-17 23:25:18,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806948652] [2021-12-17 23:25:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:18,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:18,911 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 23:25:18,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806948652] [2021-12-17 23:25:18,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806948652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:18,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:18,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:25:18,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732515384] [2021-12-17 23:25:18,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:18,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:25:18,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:25:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:25:18,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:18,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 1047 transitions, 19182 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:18,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:18,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:18,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:21,091 INFO L129 PetriNetUnfolder]: 791/2410 cut-off events. [2021-12-17 23:25:21,091 INFO L130 PetriNetUnfolder]: For 124481/124481 co-relation queries the response was YES. [2021-12-17 23:25:21,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25192 conditions, 2410 events. 791/2410 cut-off events. For 124481/124481 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 19130 event pairs, 57 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 24925. Up to 1761 conditions per place. [2021-12-17 23:25:21,139 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 912 selfloop transitions, 112 changer transitions 30/1093 dead transitions. [2021-12-17 23:25:21,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 1093 transitions, 22462 flow [2021-12-17 23:25:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:25:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:25:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2021-12-17 23:25:21,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2021-12-17 23:25:21,140 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2021-12-17 23:25:21,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2021-12-17 23:25:21,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:21,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2021-12-17 23:25:21,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 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 23:25:21,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:21,145 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:21,145 INFO L186 Difference]: Start difference. First operand has 720 places, 1047 transitions, 19182 flow. Second operand 35 states and 1853 transitions. [2021-12-17 23:25:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 1093 transitions, 22462 flow [2021-12-17 23:25:22,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 721 places, 1093 transitions, 22196 flow, removed 80 selfloop flow, removed 25 redundant places. [2021-12-17 23:25:22,120 INFO L242 Difference]: Finished difference. Result has 731 places, 1045 transitions, 19340 flow [2021-12-17 23:25:22,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18946, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=19340, PETRI_PLACES=731, PETRI_TRANSITIONS=1045} [2021-12-17 23:25:22,121 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 643 predicate places. [2021-12-17 23:25:22,121 INFO L470 AbstractCegarLoop]: Abstraction has has 731 places, 1045 transitions, 19340 flow [2021-12-17 23:25:22,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:22,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:22,122 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] [2021-12-17 23:25:22,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-12-17 23:25:22,122 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1398239640, now seen corresponding path program 180 times [2021-12-17 23:25:22,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:22,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283673996] [2021-12-17 23:25:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:22,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:22,426 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 23:25:22,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283673996] [2021-12-17 23:25:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283673996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:22,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:25:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50126525] [2021-12-17 23:25:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:25:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:25:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:25:22,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:22,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 1045 transitions, 19340 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:22,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:22,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:22,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:25,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:25:27,191 INFO L129 PetriNetUnfolder]: 794/2408 cut-off events. [2021-12-17 23:25:27,191 INFO L130 PetriNetUnfolder]: For 126650/126650 co-relation queries the response was YES. [2021-12-17 23:25:27,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 2408 events. 794/2408 cut-off events. For 126650/126650 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 19056 event pairs, 65 based on Foata normal form. 1/2406 useless extension candidates. Maximal degree in co-relation 25193. Up to 1770 conditions per place. [2021-12-17 23:25:27,250 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 918 selfloop transitions, 113 changer transitions 30/1100 dead transitions. [2021-12-17 23:25:27,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 1100 transitions, 22765 flow [2021-12-17 23:25:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:25:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:25:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1950 transitions. [2021-12-17 23:25:27,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606670500287522 [2021-12-17 23:25:27,251 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1950 transitions. [2021-12-17 23:25:27,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1950 transitions. [2021-12-17 23:25:27,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:27,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1950 transitions. [2021-12-17 23:25:27,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.7027027027027) internal successors, (1950), 37 states have internal predecessors, (1950), 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 23:25:27,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:25:27,255 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:25:27,255 INFO L186 Difference]: Start difference. First operand has 731 places, 1045 transitions, 19340 flow. Second operand 37 states and 1950 transitions. [2021-12-17 23:25:27,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 1100 transitions, 22765 flow [2021-12-17 23:25:28,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 1100 transitions, 22406 flow, removed 79 selfloop flow, removed 31 redundant places. [2021-12-17 23:25:28,352 INFO L242 Difference]: Finished difference. Result has 737 places, 1054 transitions, 19622 flow [2021-12-17 23:25:28,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19013, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19622, PETRI_PLACES=737, PETRI_TRANSITIONS=1054} [2021-12-17 23:25:28,353 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 649 predicate places. [2021-12-17 23:25:28,353 INFO L470 AbstractCegarLoop]: Abstraction has has 737 places, 1054 transitions, 19622 flow [2021-12-17 23:25:28,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:28,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:28,354 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] [2021-12-17 23:25:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-12-17 23:25:28,354 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash -119275858, now seen corresponding path program 181 times [2021-12-17 23:25:28,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:28,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691897566] [2021-12-17 23:25:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:28,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:28,623 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 23:25:28,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:28,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691897566] [2021-12-17 23:25:28,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691897566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:28,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:28,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:25:28,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167790787] [2021-12-17 23:25:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:28,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:25:28,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:28,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:25:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:25:28,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:28,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 1054 transitions, 19622 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:28,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:28,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:28,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:31,969 INFO L129 PetriNetUnfolder]: 795/2417 cut-off events. [2021-12-17 23:25:31,969 INFO L130 PetriNetUnfolder]: For 130046/130046 co-relation queries the response was YES. [2021-12-17 23:25:32,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25692 conditions, 2417 events. 795/2417 cut-off events. For 130046/130046 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19191 event pairs, 54 based on Foata normal form. 1/2415 useless extension candidates. Maximal degree in co-relation 25420. Up to 1591 conditions per place. [2021-12-17 23:25:32,032 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 784 selfloop transitions, 265 changer transitions 29/1117 dead transitions. [2021-12-17 23:25:32,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 1117 transitions, 23381 flow [2021-12-17 23:25:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:25:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-17 23:25:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2320 transitions. [2021-12-17 23:25:32,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609284332688588 [2021-12-17 23:25:32,034 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2320 transitions. [2021-12-17 23:25:32,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2320 transitions. [2021-12-17 23:25:32,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:32,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2320 transitions. [2021-12-17 23:25:32,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.72727272727273) internal successors, (2320), 44 states have internal predecessors, (2320), 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 23:25:32,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:25:32,037 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:25:32,037 INFO L186 Difference]: Start difference. First operand has 737 places, 1054 transitions, 19622 flow. Second operand 44 states and 2320 transitions. [2021-12-17 23:25:32,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 1117 transitions, 23381 flow [2021-12-17 23:25:33,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1117 transitions, 22933 flow, removed 134 selfloop flow, removed 29 redundant places. [2021-12-17 23:25:33,234 INFO L242 Difference]: Finished difference. Result has 752 places, 1060 transitions, 20054 flow [2021-12-17 23:25:33,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19220, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=20054, PETRI_PLACES=752, PETRI_TRANSITIONS=1060} [2021-12-17 23:25:33,235 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 664 predicate places. [2021-12-17 23:25:33,235 INFO L470 AbstractCegarLoop]: Abstraction has has 752 places, 1060 transitions, 20054 flow [2021-12-17 23:25:33,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:25:33,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:33,236 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] [2021-12-17 23:25:33,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-12-17 23:25:33,236 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash -909455516, now seen corresponding path program 182 times [2021-12-17 23:25:33,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:33,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476751836] [2021-12-17 23:25:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:33,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:33,528 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 23:25:33,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:33,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476751836] [2021-12-17 23:25:33,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476751836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:33,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:33,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:33,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960603283] [2021-12-17 23:25:33,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:33,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:33,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:33,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:33,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:33,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 1060 transitions, 20054 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:33,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:33,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:33,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:35,622 INFO L129 PetriNetUnfolder]: 785/2396 cut-off events. [2021-12-17 23:25:35,622 INFO L130 PetriNetUnfolder]: For 126144/126144 co-relation queries the response was YES. [2021-12-17 23:25:35,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25564 conditions, 2396 events. 785/2396 cut-off events. For 126144/126144 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18984 event pairs, 56 based on Foata normal form. 1/2394 useless extension candidates. Maximal degree in co-relation 25290. Up to 1514 conditions per place. [2021-12-17 23:25:35,685 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 766 selfloop transitions, 305 changer transitions 24/1134 dead transitions. [2021-12-17 23:25:35,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 1134 transitions, 24047 flow [2021-12-17 23:25:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:25:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:25:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1862 transitions. [2021-12-17 23:25:35,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2021-12-17 23:25:35,686 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1862 transitions. [2021-12-17 23:25:35,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1862 transitions. [2021-12-17 23:25:35,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:35,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1862 transitions. [2021-12-17 23:25:35,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.2) internal successors, (1862), 35 states have internal predecessors, (1862), 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 23:25:35,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:35,689 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:35,690 INFO L186 Difference]: Start difference. First operand has 752 places, 1060 transitions, 20054 flow. Second operand 35 states and 1862 transitions. [2021-12-17 23:25:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 1134 transitions, 24047 flow [2021-12-17 23:25:36,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 1134 transitions, 23487 flow, removed 86 selfloop flow, removed 39 redundant places. [2021-12-17 23:25:36,719 INFO L242 Difference]: Finished difference. Result has 747 places, 1074 transitions, 20818 flow [2021-12-17 23:25:36,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19526, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20818, PETRI_PLACES=747, PETRI_TRANSITIONS=1074} [2021-12-17 23:25:36,719 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 659 predicate places. [2021-12-17 23:25:36,720 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 1074 transitions, 20818 flow [2021-12-17 23:25:36,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:36,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:36,720 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] [2021-12-17 23:25:36,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-12-17 23:25:36,720 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1915329212, now seen corresponding path program 183 times [2021-12-17 23:25:36,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:36,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53991970] [2021-12-17 23:25:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:36,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:37,049 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 23:25:37,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53991970] [2021-12-17 23:25:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53991970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:37,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:25:37,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975755481] [2021-12-17 23:25:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:25:37,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:25:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:25:37,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:37,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 1074 transitions, 20818 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:25:37,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:37,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:37,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:39,314 INFO L129 PetriNetUnfolder]: 793/2367 cut-off events. [2021-12-17 23:25:39,314 INFO L130 PetriNetUnfolder]: For 128380/128380 co-relation queries the response was YES. [2021-12-17 23:25:39,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25868 conditions, 2367 events. 793/2367 cut-off events. For 128380/128380 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18581 event pairs, 56 based on Foata normal form. 1/2364 useless extension candidates. Maximal degree in co-relation 25596. Up to 1746 conditions per place. [2021-12-17 23:25:39,377 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 930 selfloop transitions, 121 changer transitions 29/1119 dead transitions. [2021-12-17 23:25:39,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 1119 transitions, 24166 flow [2021-12-17 23:25:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:25:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:25:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1950 transitions. [2021-12-17 23:25:39,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606670500287522 [2021-12-17 23:25:39,381 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1950 transitions. [2021-12-17 23:25:39,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1950 transitions. [2021-12-17 23:25:39,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:39,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1950 transitions. [2021-12-17 23:25:39,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.7027027027027) internal successors, (1950), 37 states have internal predecessors, (1950), 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 23:25:39,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:25:39,386 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:25:39,386 INFO L186 Difference]: Start difference. First operand has 747 places, 1074 transitions, 20818 flow. Second operand 37 states and 1950 transitions. [2021-12-17 23:25:39,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 1119 transitions, 24166 flow [2021-12-17 23:25:40,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 1119 transitions, 23404 flow, removed 246 selfloop flow, removed 26 redundant places. [2021-12-17 23:25:40,484 INFO L242 Difference]: Finished difference. Result has 763 places, 1072 transitions, 20555 flow [2021-12-17 23:25:40,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20148, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20555, PETRI_PLACES=763, PETRI_TRANSITIONS=1072} [2021-12-17 23:25:40,485 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 675 predicate places. [2021-12-17 23:25:40,485 INFO L470 AbstractCegarLoop]: Abstraction has has 763 places, 1072 transitions, 20555 flow [2021-12-17 23:25:40,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:25:40,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:40,485 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] [2021-12-17 23:25:40,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-12-17 23:25:40,485 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1115000266, now seen corresponding path program 184 times [2021-12-17 23:25:40,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:40,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443651345] [2021-12-17 23:25:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:40,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:40,807 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 23:25:40,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:40,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443651345] [2021-12-17 23:25:40,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443651345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:40,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:40,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:25:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000486786] [2021-12-17 23:25:40,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:40,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:25:40,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:25:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:25:40,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:40,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 1072 transitions, 20555 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:40,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:40,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:40,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:42,865 INFO L129 PetriNetUnfolder]: 784/2370 cut-off events. [2021-12-17 23:25:42,865 INFO L130 PetriNetUnfolder]: For 114603/114603 co-relation queries the response was YES. [2021-12-17 23:25:42,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25092 conditions, 2370 events. 784/2370 cut-off events. For 114603/114603 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18619 event pairs, 51 based on Foata normal form. 1/2368 useless extension candidates. Maximal degree in co-relation 24812. Up to 1768 conditions per place. [2021-12-17 23:25:42,911 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 940 selfloop transitions, 120 changer transitions 18/1117 dead transitions. [2021-12-17 23:25:42,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1117 transitions, 23831 flow [2021-12-17 23:25:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:25:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:25:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1614 transitions. [2021-12-17 23:25:42,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2021-12-17 23:25:42,913 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1614 transitions. [2021-12-17 23:25:42,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1614 transitions. [2021-12-17 23:25:42,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:42,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1614 transitions. [2021-12-17 23:25:42,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.8) internal successors, (1614), 30 states have internal predecessors, (1614), 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 23:25:42,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:25:42,915 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:25:42,916 INFO L186 Difference]: Start difference. First operand has 763 places, 1072 transitions, 20555 flow. Second operand 30 states and 1614 transitions. [2021-12-17 23:25:42,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1117 transitions, 23831 flow [2021-12-17 23:25:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 1117 transitions, 23410 flow, removed 115 selfloop flow, removed 33 redundant places. [2021-12-17 23:25:43,885 INFO L242 Difference]: Finished difference. Result has 758 places, 1080 transitions, 20838 flow [2021-12-17 23:25:43,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20162, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=20838, PETRI_PLACES=758, PETRI_TRANSITIONS=1080} [2021-12-17 23:25:43,885 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 670 predicate places. [2021-12-17 23:25:43,885 INFO L470 AbstractCegarLoop]: Abstraction has has 758 places, 1080 transitions, 20838 flow [2021-12-17 23:25:43,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:25:43,885 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:43,886 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] [2021-12-17 23:25:43,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-12-17 23:25:43,886 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1914899718, now seen corresponding path program 185 times [2021-12-17 23:25:43,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:43,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25881633] [2021-12-17 23:25:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:43,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:44,149 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 23:25:44,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25881633] [2021-12-17 23:25:44,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25881633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:44,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:44,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:44,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534186657] [2021-12-17 23:25:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:44,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:44,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:44,151 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:44,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 1080 transitions, 20838 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:44,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:44,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:44,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:46,234 INFO L129 PetriNetUnfolder]: 802/2418 cut-off events. [2021-12-17 23:25:46,235 INFO L130 PetriNetUnfolder]: For 122819/122819 co-relation queries the response was YES. [2021-12-17 23:25:46,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25948 conditions, 2418 events. 802/2418 cut-off events. For 122819/122819 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19132 event pairs, 55 based on Foata normal form. 1/2416 useless extension candidates. Maximal degree in co-relation 25669. Up to 1779 conditions per place. [2021-12-17 23:25:46,300 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 959 selfloop transitions, 139 changer transitions 23/1160 dead transitions. [2021-12-17 23:25:46,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1160 transitions, 25404 flow [2021-12-17 23:25:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:25:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:25:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1715 transitions. [2021-12-17 23:25:46,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5701462765957447 [2021-12-17 23:25:46,302 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1715 transitions. [2021-12-17 23:25:46,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1715 transitions. [2021-12-17 23:25:46,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:46,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1715 transitions. [2021-12-17 23:25:46,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.59375) internal successors, (1715), 32 states have internal predecessors, (1715), 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 23:25:46,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:25:46,305 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:25:46,305 INFO L186 Difference]: Start difference. First operand has 758 places, 1080 transitions, 20838 flow. Second operand 32 states and 1715 transitions. [2021-12-17 23:25:46,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1160 transitions, 25404 flow [2021-12-17 23:25:47,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 1160 transitions, 24529 flow, removed 348 selfloop flow, removed 24 redundant places. [2021-12-17 23:25:47,302 INFO L242 Difference]: Finished difference. Result has 769 places, 1106 transitions, 21406 flow [2021-12-17 23:25:47,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20328, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21406, PETRI_PLACES=769, PETRI_TRANSITIONS=1106} [2021-12-17 23:25:47,303 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 681 predicate places. [2021-12-17 23:25:47,303 INFO L470 AbstractCegarLoop]: Abstraction has has 769 places, 1106 transitions, 21406 flow [2021-12-17 23:25:47,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:47,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:47,303 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] [2021-12-17 23:25:47,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-12-17 23:25:47,303 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash -122841362, now seen corresponding path program 186 times [2021-12-17 23:25:47,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:47,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084772168] [2021-12-17 23:25:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:47,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:47,569 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 23:25:47,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084772168] [2021-12-17 23:25:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084772168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:47,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:47,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:47,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645073866] [2021-12-17 23:25:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:47,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:47,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:47,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:47,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:47,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 1106 transitions, 21406 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:47,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:47,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:47,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:49,608 INFO L129 PetriNetUnfolder]: 795/2412 cut-off events. [2021-12-17 23:25:49,608 INFO L130 PetriNetUnfolder]: For 122708/122708 co-relation queries the response was YES. [2021-12-17 23:25:49,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25878 conditions, 2412 events. 795/2412 cut-off events. For 122708/122708 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19076 event pairs, 55 based on Foata normal form. 1/2410 useless extension candidates. Maximal degree in co-relation 25595. Up to 1760 conditions per place. [2021-12-17 23:25:49,678 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 930 selfloop transitions, 172 changer transitions 18/1159 dead transitions. [2021-12-17 23:25:49,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 1159 transitions, 25311 flow [2021-12-17 23:25:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:25:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:25:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1871 transitions. [2021-12-17 23:25:49,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568693009118541 [2021-12-17 23:25:49,680 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1871 transitions. [2021-12-17 23:25:49,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1871 transitions. [2021-12-17 23:25:49,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:49,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1871 transitions. [2021-12-17 23:25:49,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.457142857142856) internal successors, (1871), 35 states have internal predecessors, (1871), 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 23:25:49,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:49,683 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:25:49,683 INFO L186 Difference]: Start difference. First operand has 769 places, 1106 transitions, 21406 flow. Second operand 35 states and 1871 transitions. [2021-12-17 23:25:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 1159 transitions, 25311 flow [2021-12-17 23:25:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1159 transitions, 24296 flow, removed 440 selfloop flow, removed 23 redundant places. [2021-12-17 23:25:50,726 INFO L242 Difference]: Finished difference. Result has 783 places, 1119 transitions, 21701 flow [2021-12-17 23:25:50,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20743, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21701, PETRI_PLACES=783, PETRI_TRANSITIONS=1119} [2021-12-17 23:25:50,727 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 695 predicate places. [2021-12-17 23:25:50,727 INFO L470 AbstractCegarLoop]: Abstraction has has 783 places, 1119 transitions, 21701 flow [2021-12-17 23:25:50,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:50,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:50,727 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] [2021-12-17 23:25:50,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-12-17 23:25:50,727 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:50,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1444979862, now seen corresponding path program 187 times [2021-12-17 23:25:50,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665398621] [2021-12-17 23:25:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:50,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:50,999 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 23:25:50,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:50,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665398621] [2021-12-17 23:25:50,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665398621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:50,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:50,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:50,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629360145] [2021-12-17 23:25:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:51,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:51,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:51,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:51,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 1119 transitions, 21701 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:51,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:51,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:51,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:53,160 INFO L129 PetriNetUnfolder]: 795/2428 cut-off events. [2021-12-17 23:25:53,160 INFO L130 PetriNetUnfolder]: For 120321/120321 co-relation queries the response was YES. [2021-12-17 23:25:53,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25798 conditions, 2428 events. 795/2428 cut-off events. For 120321/120321 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19344 event pairs, 48 based on Foata normal form. 1/2426 useless extension candidates. Maximal degree in co-relation 25510. Up to 1638 conditions per place. [2021-12-17 23:25:53,216 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 892 selfloop transitions, 230 changer transitions 19/1180 dead transitions. [2021-12-17 23:25:53,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 1180 transitions, 25449 flow [2021-12-17 23:25:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:25:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:25:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1707 transitions. [2021-12-17 23:25:53,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5674867021276596 [2021-12-17 23:25:53,218 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1707 transitions. [2021-12-17 23:25:53,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1707 transitions. [2021-12-17 23:25:53,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:53,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1707 transitions. [2021-12-17 23:25:53,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.34375) internal successors, (1707), 32 states have internal predecessors, (1707), 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 23:25:53,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:25:53,221 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:25:53,221 INFO L186 Difference]: Start difference. First operand has 783 places, 1119 transitions, 21701 flow. Second operand 32 states and 1707 transitions. [2021-12-17 23:25:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 1180 transitions, 25449 flow [2021-12-17 23:25:54,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1180 transitions, 24800 flow, removed 252 selfloop flow, removed 25 redundant places. [2021-12-17 23:25:54,330 INFO L242 Difference]: Finished difference. Result has 791 places, 1128 transitions, 21993 flow [2021-12-17 23:25:54,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21082, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21993, PETRI_PLACES=791, PETRI_TRANSITIONS=1128} [2021-12-17 23:25:54,331 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 703 predicate places. [2021-12-17 23:25:54,331 INFO L470 AbstractCegarLoop]: Abstraction has has 791 places, 1128 transitions, 21993 flow [2021-12-17 23:25:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:54,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:54,331 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] [2021-12-17 23:25:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-12-17 23:25:54,332 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 992736548, now seen corresponding path program 188 times [2021-12-17 23:25:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3981175] [2021-12-17 23:25:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:54,623 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 23:25:54,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3981175] [2021-12-17 23:25:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3981175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:54,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:54,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:54,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498747489] [2021-12-17 23:25:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:54,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:54,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:54,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:54,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:54,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1128 transitions, 21993 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:54,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:54,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:54,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:25:56,689 INFO L129 PetriNetUnfolder]: 803/2446 cut-off events. [2021-12-17 23:25:56,689 INFO L130 PetriNetUnfolder]: For 123581/123581 co-relation queries the response was YES. [2021-12-17 23:25:56,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 2446 events. 803/2446 cut-off events. For 123581/123581 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19484 event pairs, 56 based on Foata normal form. 1/2444 useless extension candidates. Maximal degree in co-relation 25989. Up to 1839 conditions per place. [2021-12-17 23:25:56,759 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1006 selfloop transitions, 117 changer transitions 20/1182 dead transitions. [2021-12-17 23:25:56,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 1182 transitions, 25621 flow [2021-12-17 23:25:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:25:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:25:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1812 transitions. [2021-12-17 23:25:56,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5669586983729662 [2021-12-17 23:25:56,761 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1812 transitions. [2021-12-17 23:25:56,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1812 transitions. [2021-12-17 23:25:56,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:25:56,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1812 transitions. [2021-12-17 23:25:56,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.294117647058826) internal successors, (1812), 34 states have internal predecessors, (1812), 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 23:25:56,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:25:56,764 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:25:56,765 INFO L186 Difference]: Start difference. First operand has 791 places, 1128 transitions, 21993 flow. Second operand 34 states and 1812 transitions. [2021-12-17 23:25:56,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 819 places, 1182 transitions, 25621 flow [2021-12-17 23:25:57,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 794 places, 1182 transitions, 25132 flow, removed 119 selfloop flow, removed 25 redundant places. [2021-12-17 23:25:58,068 INFO L242 Difference]: Finished difference. Result has 805 places, 1143 transitions, 22278 flow [2021-12-17 23:25:58,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21524, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1019, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22278, PETRI_PLACES=805, PETRI_TRANSITIONS=1143} [2021-12-17 23:25:58,070 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 717 predicate places. [2021-12-17 23:25:58,070 INFO L470 AbstractCegarLoop]: Abstraction has has 805 places, 1143 transitions, 22278 flow [2021-12-17 23:25:58,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:58,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:25:58,070 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] [2021-12-17 23:25:58,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-12-17 23:25:58,071 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:25:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:25:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2045822716, now seen corresponding path program 189 times [2021-12-17 23:25:58,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:25:58,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171385525] [2021-12-17 23:25:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:25:58,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:25:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:25:58,363 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 23:25:58,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:25:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171385525] [2021-12-17 23:25:58,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171385525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:25:58,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:25:58,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:25:58,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104094349] [2021-12-17 23:25:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:25:58,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:25:58,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:25:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:25:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:25:58,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:25:58,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1143 transitions, 22278 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:25:58,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:25:58,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:25:58,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:00,703 INFO L129 PetriNetUnfolder]: 849/2569 cut-off events. [2021-12-17 23:26:00,703 INFO L130 PetriNetUnfolder]: For 123604/123604 co-relation queries the response was YES. [2021-12-17 23:26:00,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 2569 events. 849/2569 cut-off events. For 123604/123604 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20788 event pairs, 54 based on Foata normal form. 1/2567 useless extension candidates. Maximal degree in co-relation 27338. Up to 1613 conditions per place. [2021-12-17 23:26:00,784 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 819 selfloop transitions, 376 changer transitions 35/1269 dead transitions. [2021-12-17 23:26:00,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 1269 transitions, 27911 flow [2021-12-17 23:26:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:26:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:26:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2124 transitions. [2021-12-17 23:26:00,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5648936170212766 [2021-12-17 23:26:00,785 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2124 transitions. [2021-12-17 23:26:00,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2124 transitions. [2021-12-17 23:26:00,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:00,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2124 transitions. [2021-12-17 23:26:00,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 53.1) internal successors, (2124), 40 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:26:00,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:26:00,789 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:26:00,789 INFO L186 Difference]: Start difference. First operand has 805 places, 1143 transitions, 22278 flow. Second operand 40 states and 2124 transitions. [2021-12-17 23:26:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 1269 transitions, 27911 flow [2021-12-17 23:26:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 1269 transitions, 27370 flow, removed 182 selfloop flow, removed 25 redundant places. [2021-12-17 23:26:02,092 INFO L242 Difference]: Finished difference. Result has 824 places, 1206 transitions, 24530 flow [2021-12-17 23:26:02,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=21755, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=24530, PETRI_PLACES=824, PETRI_TRANSITIONS=1206} [2021-12-17 23:26:02,093 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 736 predicate places. [2021-12-17 23:26:02,093 INFO L470 AbstractCegarLoop]: Abstraction has has 824 places, 1206 transitions, 24530 flow [2021-12-17 23:26:02,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:02,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:02,093 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] [2021-12-17 23:26:02,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-12-17 23:26:02,093 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1311245170, now seen corresponding path program 190 times [2021-12-17 23:26:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:02,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216495946] [2021-12-17 23:26:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:02,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:02,362 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 23:26:02,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:02,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216495946] [2021-12-17 23:26:02,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216495946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:02,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:02,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:02,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566828189] [2021-12-17 23:26:02,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:02,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:02,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:02,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:02,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 1206 transitions, 24530 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:02,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:02,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:02,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:04,563 INFO L129 PetriNetUnfolder]: 831/2543 cut-off events. [2021-12-17 23:26:04,564 INFO L130 PetriNetUnfolder]: For 125039/125039 co-relation queries the response was YES. [2021-12-17 23:26:04,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27759 conditions, 2543 events. 831/2543 cut-off events. For 125039/125039 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20594 event pairs, 53 based on Foata normal form. 1/2541 useless extension candidates. Maximal degree in co-relation 27456. Up to 1904 conditions per place. [2021-12-17 23:26:04,636 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1062 selfloop transitions, 122 changer transitions 21/1244 dead transitions. [2021-12-17 23:26:04,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 1244 transitions, 27626 flow [2021-12-17 23:26:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:26:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:26:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1710 transitions. [2021-12-17 23:26:04,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5684840425531915 [2021-12-17 23:26:04,637 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1710 transitions. [2021-12-17 23:26:04,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1710 transitions. [2021-12-17 23:26:04,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:04,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1710 transitions. [2021-12-17 23:26:04,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.4375) internal successors, (1710), 32 states have internal predecessors, (1710), 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 23:26:04,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:26:04,640 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:26:04,640 INFO L186 Difference]: Start difference. First operand has 824 places, 1206 transitions, 24530 flow. Second operand 32 states and 1710 transitions. [2021-12-17 23:26:04,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 1244 transitions, 27626 flow [2021-12-17 23:26:06,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 1244 transitions, 26812 flow, removed 209 selfloop flow, removed 28 redundant places. [2021-12-17 23:26:06,041 INFO L242 Difference]: Finished difference. Result has 832 places, 1206 transitions, 24045 flow [2021-12-17 23:26:06,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23730, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24045, PETRI_PLACES=832, PETRI_TRANSITIONS=1206} [2021-12-17 23:26:06,042 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 744 predicate places. [2021-12-17 23:26:06,042 INFO L470 AbstractCegarLoop]: Abstraction has has 832 places, 1206 transitions, 24045 flow [2021-12-17 23:26:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:06,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:06,042 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] [2021-12-17 23:26:06,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-12-17 23:26:06,042 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash -487937938, now seen corresponding path program 191 times [2021-12-17 23:26:06,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:06,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892184998] [2021-12-17 23:26:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:06,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:06,313 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 23:26:06,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892184998] [2021-12-17 23:26:06,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892184998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:06,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:06,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:06,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491302554] [2021-12-17 23:26:06,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:06,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:06,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:06,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:06,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1206 transitions, 24045 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:06,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:06,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:06,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:08,751 INFO L129 PetriNetUnfolder]: 838/2569 cut-off events. [2021-12-17 23:26:08,752 INFO L130 PetriNetUnfolder]: For 123392/123392 co-relation queries the response was YES. [2021-12-17 23:26:08,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27782 conditions, 2569 events. 838/2569 cut-off events. For 123392/123392 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20919 event pairs, 43 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 27474. Up to 1802 conditions per place. [2021-12-17 23:26:08,817 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 995 selfloop transitions, 200 changer transitions 38/1272 dead transitions. [2021-12-17 23:26:08,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 1272 transitions, 28110 flow [2021-12-17 23:26:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:26:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:26:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1960 transitions. [2021-12-17 23:26:08,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635422656699253 [2021-12-17 23:26:08,818 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1960 transitions. [2021-12-17 23:26:08,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1960 transitions. [2021-12-17 23:26:08,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:08,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1960 transitions. [2021-12-17 23:26:08,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.972972972972975) internal successors, (1960), 37 states have internal predecessors, (1960), 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 23:26:08,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:26:08,821 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:26:08,822 INFO L186 Difference]: Start difference. First operand has 832 places, 1206 transitions, 24045 flow. Second operand 37 states and 1960 transitions. [2021-12-17 23:26:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 1272 transitions, 28110 flow [2021-12-17 23:26:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 1272 transitions, 27807 flow, removed 22 selfloop flow, removed 29 redundant places. [2021-12-17 23:26:10,161 INFO L242 Difference]: Finished difference. Result has 842 places, 1212 transitions, 24532 flow [2021-12-17 23:26:10,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23758, PETRI_DIFFERENCE_MINUEND_PLACES=795, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24532, PETRI_PLACES=842, PETRI_TRANSITIONS=1212} [2021-12-17 23:26:10,162 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 754 predicate places. [2021-12-17 23:26:10,162 INFO L470 AbstractCegarLoop]: Abstraction has has 842 places, 1212 transitions, 24532 flow [2021-12-17 23:26:10,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:10,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:10,162 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] [2021-12-17 23:26:10,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-12-17 23:26:10,162 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash 433746206, now seen corresponding path program 192 times [2021-12-17 23:26:10,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347509135] [2021-12-17 23:26:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:10,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:10,451 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 23:26:10,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347509135] [2021-12-17 23:26:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347509135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:10,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682462589] [2021-12-17 23:26:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:10,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:10,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:10,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 842 places, 1212 transitions, 24532 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:10,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:10,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:10,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:12,722 INFO L129 PetriNetUnfolder]: 811/2525 cut-off events. [2021-12-17 23:26:12,722 INFO L130 PetriNetUnfolder]: For 123122/123122 co-relation queries the response was YES. [2021-12-17 23:26:12,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27295 conditions, 2525 events. 811/2525 cut-off events. For 123122/123122 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20625 event pairs, 44 based on Foata normal form. 1/2523 useless extension candidates. Maximal degree in co-relation 26986. Up to 1904 conditions per place. [2021-12-17 23:26:12,777 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1077 selfloop transitions, 107 changer transitions 22/1245 dead transitions. [2021-12-17 23:26:12,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 1245 transitions, 27461 flow [2021-12-17 23:26:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:26:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:26:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1656 transitions. [2021-12-17 23:26:12,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5682910089224433 [2021-12-17 23:26:12,778 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1656 transitions. [2021-12-17 23:26:12,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1656 transitions. [2021-12-17 23:26:12,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:12,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1656 transitions. [2021-12-17 23:26:12,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.41935483870968) internal successors, (1656), 31 states have internal predecessors, (1656), 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 23:26:12,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:26:12,781 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:26:12,781 INFO L186 Difference]: Start difference. First operand has 842 places, 1212 transitions, 24532 flow. Second operand 31 states and 1656 transitions. [2021-12-17 23:26:12,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 1245 transitions, 27461 flow [2021-12-17 23:26:14,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 1245 transitions, 26947 flow, removed 124 selfloop flow, removed 28 redundant places. [2021-12-17 23:26:14,159 INFO L242 Difference]: Finished difference. Result has 846 places, 1205 transitions, 24228 flow [2021-12-17 23:26:14,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24030, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=24228, PETRI_PLACES=846, PETRI_TRANSITIONS=1205} [2021-12-17 23:26:14,160 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 758 predicate places. [2021-12-17 23:26:14,160 INFO L470 AbstractCegarLoop]: Abstraction has has 846 places, 1205 transitions, 24228 flow [2021-12-17 23:26:14,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:14,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:14,161 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] [2021-12-17 23:26:14,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-12-17 23:26:14,161 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1774734578, now seen corresponding path program 193 times [2021-12-17 23:26:14,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:14,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547381426] [2021-12-17 23:26:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:14,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:14,451 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 23:26:14,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:14,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547381426] [2021-12-17 23:26:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547381426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:14,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:14,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:14,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000221986] [2021-12-17 23:26:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:14,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:14,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:14,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:14,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 1205 transitions, 24228 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:14,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:14,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:14,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:16,819 INFO L129 PetriNetUnfolder]: 814/2531 cut-off events. [2021-12-17 23:26:16,819 INFO L130 PetriNetUnfolder]: For 124184/124184 co-relation queries the response was YES. [2021-12-17 23:26:16,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 2531 events. 814/2531 cut-off events. For 124184/124184 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 20635 event pairs, 50 based on Foata normal form. 1/2530 useless extension candidates. Maximal degree in co-relation 27212. Up to 1840 conditions per place. [2021-12-17 23:26:16,898 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1010 selfloop transitions, 187 changer transitions 22/1258 dead transitions. [2021-12-17 23:26:16,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 1258 transitions, 28101 flow [2021-12-17 23:26:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:26:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:26:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2174 transitions. [2021-12-17 23:26:16,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5640892579138558 [2021-12-17 23:26:16,899 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2174 transitions. [2021-12-17 23:26:16,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2174 transitions. [2021-12-17 23:26:16,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:16,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2174 transitions. [2021-12-17 23:26:16,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 53.02439024390244) internal successors, (2174), 41 states have internal predecessors, (2174), 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 23:26:16,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:26:16,903 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:26:16,903 INFO L186 Difference]: Start difference. First operand has 846 places, 1205 transitions, 24228 flow. Second operand 41 states and 2174 transitions. [2021-12-17 23:26:16,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 1258 transitions, 28101 flow [2021-12-17 23:26:18,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 844 places, 1258 transitions, 27802 flow, removed 26 selfloop flow, removed 31 redundant places. [2021-12-17 23:26:18,497 INFO L242 Difference]: Finished difference. Result has 855 places, 1215 transitions, 24840 flow [2021-12-17 23:26:18,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23970, PETRI_DIFFERENCE_MINUEND_PLACES=804, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24840, PETRI_PLACES=855, PETRI_TRANSITIONS=1215} [2021-12-17 23:26:18,498 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 767 predicate places. [2021-12-17 23:26:18,498 INFO L470 AbstractCegarLoop]: Abstraction has has 855 places, 1215 transitions, 24840 flow [2021-12-17 23:26:18,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:18,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:18,498 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] [2021-12-17 23:26:18,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-12-17 23:26:18,498 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1425106594, now seen corresponding path program 194 times [2021-12-17 23:26:18,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263069213] [2021-12-17 23:26:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:18,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:18,799 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 23:26:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263069213] [2021-12-17 23:26:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263069213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:18,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:18,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:18,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686590565] [2021-12-17 23:26:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:18,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:18,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:18,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 855 places, 1215 transitions, 24840 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:18,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:18,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:18,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:21,259 INFO L129 PetriNetUnfolder]: 808/2494 cut-off events. [2021-12-17 23:26:21,259 INFO L130 PetriNetUnfolder]: For 123456/123456 co-relation queries the response was YES. [2021-12-17 23:26:21,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27413 conditions, 2494 events. 808/2494 cut-off events. For 123456/123456 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20281 event pairs, 53 based on Foata normal form. 1/2491 useless extension candidates. Maximal degree in co-relation 27100. Up to 1848 conditions per place. [2021-12-17 23:26:21,330 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1040 selfloop transitions, 147 changer transitions 21/1247 dead transitions. [2021-12-17 23:26:21,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 886 places, 1247 transitions, 27804 flow [2021-12-17 23:26:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:26:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:26:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2015 transitions. [2021-12-17 23:26:21,332 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641097424412094 [2021-12-17 23:26:21,332 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2015 transitions. [2021-12-17 23:26:21,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2015 transitions. [2021-12-17 23:26:21,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:21,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2015 transitions. [2021-12-17 23:26:21,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 53.026315789473685) internal successors, (2015), 38 states have internal predecessors, (2015), 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 23:26:21,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:26:21,335 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:26:21,335 INFO L186 Difference]: Start difference. First operand has 855 places, 1215 transitions, 24840 flow. Second operand 38 states and 2015 transitions. [2021-12-17 23:26:21,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 886 places, 1247 transitions, 27804 flow [2021-12-17 23:26:22,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 1247 transitions, 27084 flow, removed 219 selfloop flow, removed 34 redundant places. [2021-12-17 23:26:22,686 INFO L242 Difference]: Finished difference. Result has 860 places, 1208 transitions, 24458 flow [2021-12-17 23:26:22,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24170, PETRI_DIFFERENCE_MINUEND_PLACES=815, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=24458, PETRI_PLACES=860, PETRI_TRANSITIONS=1208} [2021-12-17 23:26:22,687 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 772 predicate places. [2021-12-17 23:26:22,687 INFO L470 AbstractCegarLoop]: Abstraction has has 860 places, 1208 transitions, 24458 flow [2021-12-17 23:26:22,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:22,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:22,687 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] [2021-12-17 23:26:22,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-12-17 23:26:22,687 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 559914934, now seen corresponding path program 195 times [2021-12-17 23:26:22,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625991917] [2021-12-17 23:26:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:22,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:22,951 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 23:26:22,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625991917] [2021-12-17 23:26:22,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625991917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:22,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:22,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:22,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557956869] [2021-12-17 23:26:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:22,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:22,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:22,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:22,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 1208 transitions, 24458 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:22,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:22,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:22,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:25,112 INFO L129 PetriNetUnfolder]: 806/2508 cut-off events. [2021-12-17 23:26:25,112 INFO L130 PetriNetUnfolder]: For 112773/112773 co-relation queries the response was YES. [2021-12-17 23:26:25,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27065 conditions, 2508 events. 806/2508 cut-off events. For 112773/112773 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20411 event pairs, 50 based on Foata normal form. 1/2506 useless extension candidates. Maximal degree in co-relation 26755. Up to 1681 conditions per place. [2021-12-17 23:26:25,176 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 927 selfloop transitions, 272 changer transitions 22/1260 dead transitions. [2021-12-17 23:26:25,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 1260 transitions, 27976 flow [2021-12-17 23:26:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:26:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:26:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1860 transitions. [2021-12-17 23:26:25,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2021-12-17 23:26:25,177 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1860 transitions. [2021-12-17 23:26:25,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1860 transitions. [2021-12-17 23:26:25,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:25,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1860 transitions. [2021-12-17 23:26:25,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.142857142857146) internal successors, (1860), 35 states have internal predecessors, (1860), 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 23:26:25,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:26:25,180 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:26:25,180 INFO L186 Difference]: Start difference. First operand has 860 places, 1208 transitions, 24458 flow. Second operand 35 states and 1860 transitions. [2021-12-17 23:26:25,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 1260 transitions, 27976 flow [2021-12-17 23:26:26,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 1260 transitions, 27591 flow, removed 25 selfloop flow, removed 38 redundant places. [2021-12-17 23:26:26,467 INFO L242 Difference]: Finished difference. Result has 852 places, 1211 transitions, 24967 flow [2021-12-17 23:26:26,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24101, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=24967, PETRI_PLACES=852, PETRI_TRANSITIONS=1211} [2021-12-17 23:26:26,467 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 764 predicate places. [2021-12-17 23:26:26,467 INFO L470 AbstractCegarLoop]: Abstraction has has 852 places, 1211 transitions, 24967 flow [2021-12-17 23:26:26,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:26,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:26,468 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] [2021-12-17 23:26:26,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-12-17 23:26:26,468 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -537118896, now seen corresponding path program 196 times [2021-12-17 23:26:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620368419] [2021-12-17 23:26:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:26,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:26,744 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 23:26:26,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:26,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620368419] [2021-12-17 23:26:26,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620368419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:26,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:26,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:26,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795857209] [2021-12-17 23:26:26,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:26,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:26,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:26,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:26,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 1211 transitions, 24967 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:26,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:26,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:26,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:29,628 INFO L129 PetriNetUnfolder]: 846/2668 cut-off events. [2021-12-17 23:26:29,628 INFO L130 PetriNetUnfolder]: For 125475/125475 co-relation queries the response was YES. [2021-12-17 23:26:29,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29053 conditions, 2668 events. 846/2668 cut-off events. For 125475/125475 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22294 event pairs, 52 based on Foata normal form. 1/2666 useless extension candidates. Maximal degree in co-relation 28746. Up to 1911 conditions per place. [2021-12-17 23:26:29,711 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1084 selfloop transitions, 182 changer transitions 21/1326 dead transitions. [2021-12-17 23:26:29,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 1326 transitions, 30439 flow [2021-12-17 23:26:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:26:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:26:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1974 transitions. [2021-12-17 23:26:29,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2021-12-17 23:26:29,712 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1974 transitions. [2021-12-17 23:26:29,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1974 transitions. [2021-12-17 23:26:29,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:29,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1974 transitions. [2021-12-17 23:26:29,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.351351351351354) internal successors, (1974), 37 states have internal predecessors, (1974), 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 23:26:29,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:26:29,716 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:26:29,716 INFO L186 Difference]: Start difference. First operand has 852 places, 1211 transitions, 24967 flow. Second operand 37 states and 1974 transitions. [2021-12-17 23:26:29,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 1326 transitions, 30439 flow [2021-12-17 23:26:31,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 1326 transitions, 29871 flow, removed 119 selfloop flow, removed 27 redundant places. [2021-12-17 23:26:31,276 INFO L242 Difference]: Finished difference. Result has 868 places, 1277 transitions, 26858 flow [2021-12-17 23:26:31,276 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24413, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26858, PETRI_PLACES=868, PETRI_TRANSITIONS=1277} [2021-12-17 23:26:31,276 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 780 predicate places. [2021-12-17 23:26:31,276 INFO L470 AbstractCegarLoop]: Abstraction has has 868 places, 1277 transitions, 26858 flow [2021-12-17 23:26:31,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:31,277 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:31,277 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] [2021-12-17 23:26:31,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-12-17 23:26:31,277 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1420716914, now seen corresponding path program 197 times [2021-12-17 23:26:31,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381383016] [2021-12-17 23:26:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:31,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:31,565 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 23:26:31,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381383016] [2021-12-17 23:26:31,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381383016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:31,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:31,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:31,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111423656] [2021-12-17 23:26:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:31,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:31,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:31,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:31,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 868 places, 1277 transitions, 26858 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:31,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:31,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:31,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:34,354 INFO L129 PetriNetUnfolder]: 851/2692 cut-off events. [2021-12-17 23:26:34,354 INFO L130 PetriNetUnfolder]: For 135864/135864 co-relation queries the response was YES. [2021-12-17 23:26:34,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29733 conditions, 2692 events. 851/2692 cut-off events. For 135864/135864 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22623 event pairs, 52 based on Foata normal form. 1/2690 useless extension candidates. Maximal degree in co-relation 29418. Up to 1985 conditions per place. [2021-12-17 23:26:34,433 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1123 selfloop transitions, 140 changer transitions 26/1328 dead transitions. [2021-12-17 23:26:34,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 1328 transitions, 30691 flow [2021-12-17 23:26:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:26:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:26:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2005 transitions. [2021-12-17 23:26:34,434 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613101903695409 [2021-12-17 23:26:34,434 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2005 transitions. [2021-12-17 23:26:34,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2005 transitions. [2021-12-17 23:26:34,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:34,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2005 transitions. [2021-12-17 23:26:34,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.76315789473684) internal successors, (2005), 38 states have internal predecessors, (2005), 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 23:26:34,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:26:34,438 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:26:34,438 INFO L186 Difference]: Start difference. First operand has 868 places, 1277 transitions, 26858 flow. Second operand 38 states and 2005 transitions. [2021-12-17 23:26:34,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 1328 transitions, 30691 flow [2021-12-17 23:26:35,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 1328 transitions, 29869 flow, removed 351 selfloop flow, removed 21 redundant places. [2021-12-17 23:26:35,986 INFO L242 Difference]: Finished difference. Result has 888 places, 1287 transitions, 26789 flow [2021-12-17 23:26:35,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26040, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=26789, PETRI_PLACES=888, PETRI_TRANSITIONS=1287} [2021-12-17 23:26:35,986 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 800 predicate places. [2021-12-17 23:26:35,986 INFO L470 AbstractCegarLoop]: Abstraction has has 888 places, 1287 transitions, 26789 flow [2021-12-17 23:26:35,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:35,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:35,987 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] [2021-12-17 23:26:35,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-12-17 23:26:35,987 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1713886124, now seen corresponding path program 198 times [2021-12-17 23:26:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:35,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621612935] [2021-12-17 23:26:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:35,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:36,251 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 23:26:36,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621612935] [2021-12-17 23:26:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621612935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:36,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:26:36,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980602306] [2021-12-17 23:26:36,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:36,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:26:36,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:26:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:26:36,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:36,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 1287 transitions, 26789 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:26:36,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:36,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:36,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:38,504 INFO L129 PetriNetUnfolder]: 845/2679 cut-off events. [2021-12-17 23:26:38,504 INFO L130 PetriNetUnfolder]: For 132552/132552 co-relation queries the response was YES. [2021-12-17 23:26:38,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29388 conditions, 2679 events. 845/2679 cut-off events. For 132552/132552 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22477 event pairs, 46 based on Foata normal form. 1/2677 useless extension candidates. Maximal degree in co-relation 29064. Up to 1952 conditions per place. [2021-12-17 23:26:38,579 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1125 selfloop transitions, 150 changer transitions 24/1338 dead transitions. [2021-12-17 23:26:38,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 1338 transitions, 30766 flow [2021-12-17 23:26:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:26:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:26:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1614 transitions. [2021-12-17 23:26:38,581 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2021-12-17 23:26:38,581 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1614 transitions. [2021-12-17 23:26:38,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1614 transitions. [2021-12-17 23:26:38,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:38,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1614 transitions. [2021-12-17 23:26:38,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.8) internal successors, (1614), 30 states have internal predecessors, (1614), 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 23:26:38,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:26:38,584 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:26:38,584 INFO L186 Difference]: Start difference. First operand has 888 places, 1287 transitions, 26789 flow. Second operand 30 states and 1614 transitions. [2021-12-17 23:26:38,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 1338 transitions, 30766 flow [2021-12-17 23:26:40,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 1338 transitions, 30258 flow, removed 118 selfloop flow, removed 32 redundant places. [2021-12-17 23:26:40,105 INFO L242 Difference]: Finished difference. Result has 883 places, 1289 transitions, 26924 flow [2021-12-17 23:26:40,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26299, PETRI_DIFFERENCE_MINUEND_PLACES=847, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26924, PETRI_PLACES=883, PETRI_TRANSITIONS=1289} [2021-12-17 23:26:40,106 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 795 predicate places. [2021-12-17 23:26:40,106 INFO L470 AbstractCegarLoop]: Abstraction has has 883 places, 1289 transitions, 26924 flow [2021-12-17 23:26:40,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:26:40,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:40,107 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] [2021-12-17 23:26:40,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-12-17 23:26:40,107 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1019982742, now seen corresponding path program 199 times [2021-12-17 23:26:40,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561588599] [2021-12-17 23:26:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:40,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:40,380 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 23:26:40,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:40,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561588599] [2021-12-17 23:26:40,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561588599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:40,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:40,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:40,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066179699] [2021-12-17 23:26:40,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:40,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:40,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:40,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 883 places, 1289 transitions, 26924 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:40,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:40,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:40,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:43,010 INFO L129 PetriNetUnfolder]: 845/2660 cut-off events. [2021-12-17 23:26:43,010 INFO L130 PetriNetUnfolder]: For 134750/134750 co-relation queries the response was YES. [2021-12-17 23:26:43,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29478 conditions, 2660 events. 845/2660 cut-off events. For 134750/134750 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22240 event pairs, 50 based on Foata normal form. 1/2658 useless extension candidates. Maximal degree in co-relation 29154. Up to 1941 conditions per place. [2021-12-17 23:26:43,072 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1130 selfloop transitions, 158 changer transitions 21/1348 dead transitions. [2021-12-17 23:26:43,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 1348 transitions, 31422 flow [2021-12-17 23:26:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:26:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:26:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-12-17 23:26:43,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-12-17 23:26:43,073 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-12-17 23:26:43,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-12-17 23:26:43,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:43,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-12-17 23:26:43,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 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 23:26:43,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:26:43,076 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:26:43,077 INFO L186 Difference]: Start difference. First operand has 883 places, 1289 transitions, 26924 flow. Second operand 34 states and 1817 transitions. [2021-12-17 23:26:43,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 1348 transitions, 31422 flow [2021-12-17 23:26:44,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 1348 transitions, 30722 flow, removed 284 selfloop flow, removed 22 redundant places. [2021-12-17 23:26:44,599 INFO L242 Difference]: Finished difference. Result has 896 places, 1300 transitions, 27358 flow [2021-12-17 23:26:44,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26500, PETRI_DIFFERENCE_MINUEND_PLACES=856, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=27358, PETRI_PLACES=896, PETRI_TRANSITIONS=1300} [2021-12-17 23:26:44,599 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 808 predicate places. [2021-12-17 23:26:44,599 INFO L470 AbstractCegarLoop]: Abstraction has has 896 places, 1300 transitions, 27358 flow [2021-12-17 23:26:44,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:44,600 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:44,600 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] [2021-12-17 23:26:44,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-12-17 23:26:44,600 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1122981142, now seen corresponding path program 200 times [2021-12-17 23:26:44,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:44,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721606286] [2021-12-17 23:26:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:44,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:44,876 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 23:26:44,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:44,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721606286] [2021-12-17 23:26:44,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721606286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:44,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:44,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:44,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354240217] [2021-12-17 23:26:44,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:44,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:44,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:44,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:44,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 1300 transitions, 27358 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:44,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:44,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:44,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:47,657 INFO L129 PetriNetUnfolder]: 842/2636 cut-off events. [2021-12-17 23:26:47,657 INFO L130 PetriNetUnfolder]: For 131519/131519 co-relation queries the response was YES. [2021-12-17 23:26:47,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29259 conditions, 2636 events. 842/2636 cut-off events. For 131519/131519 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 21926 event pairs, 50 based on Foata normal form. 1/2633 useless extension candidates. Maximal degree in co-relation 28931. Up to 1950 conditions per place. [2021-12-17 23:26:47,739 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1145 selfloop transitions, 138 changer transitions 21/1343 dead transitions. [2021-12-17 23:26:47,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 926 places, 1343 transitions, 30824 flow [2021-12-17 23:26:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:26:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:26:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1912 transitions. [2021-12-17 23:26:47,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2021-12-17 23:26:47,740 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1912 transitions. [2021-12-17 23:26:47,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1912 transitions. [2021-12-17 23:26:47,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:47,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1912 transitions. [2021-12-17 23:26:47,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.111111111111114) internal successors, (1912), 36 states have internal predecessors, (1912), 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 23:26:47,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:26:47,744 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:26:47,744 INFO L186 Difference]: Start difference. First operand has 896 places, 1300 transitions, 27358 flow. Second operand 36 states and 1912 transitions. [2021-12-17 23:26:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 926 places, 1343 transitions, 30824 flow [2021-12-17 23:26:49,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 1343 transitions, 30271 flow, removed 178 selfloop flow, removed 27 redundant places. [2021-12-17 23:26:49,461 INFO L242 Difference]: Finished difference. Result has 910 places, 1300 transitions, 27151 flow [2021-12-17 23:26:49,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26827, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=27151, PETRI_PLACES=910, PETRI_TRANSITIONS=1300} [2021-12-17 23:26:49,461 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 822 predicate places. [2021-12-17 23:26:49,461 INFO L470 AbstractCegarLoop]: Abstraction has has 910 places, 1300 transitions, 27151 flow [2021-12-17 23:26:49,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:49,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:49,462 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] [2021-12-17 23:26:49,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-12-17 23:26:49,462 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1815506512, now seen corresponding path program 201 times [2021-12-17 23:26:49,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:49,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013922390] [2021-12-17 23:26:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:49,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:49,766 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 23:26:49,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013922390] [2021-12-17 23:26:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013922390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:49,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:49,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:49,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968245936] [2021-12-17 23:26:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:49,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:49,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:49,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:49,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 910 places, 1300 transitions, 27151 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:49,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:49,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:49,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:52,071 INFO L129 PetriNetUnfolder]: 834/2618 cut-off events. [2021-12-17 23:26:52,071 INFO L130 PetriNetUnfolder]: For 123875/123875 co-relation queries the response was YES. [2021-12-17 23:26:52,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28737 conditions, 2618 events. 834/2618 cut-off events. For 123875/123875 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 21765 event pairs, 46 based on Foata normal form. 1/2616 useless extension candidates. Maximal degree in co-relation 28402. Up to 1778 conditions per place. [2021-12-17 23:26:52,157 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 998 selfloop transitions, 238 changer transitions 59/1334 dead transitions. [2021-12-17 23:26:52,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 1334 transitions, 30142 flow [2021-12-17 23:26:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:26:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:26:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1804 transitions. [2021-12-17 23:26:52,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644555694618273 [2021-12-17 23:26:52,159 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1804 transitions. [2021-12-17 23:26:52,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1804 transitions. [2021-12-17 23:26:52,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:52,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1804 transitions. [2021-12-17 23:26:52,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.05882352941177) internal successors, (1804), 34 states have internal predecessors, (1804), 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 23:26:52,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:26:52,162 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:26:52,162 INFO L186 Difference]: Start difference. First operand has 910 places, 1300 transitions, 27151 flow. Second operand 34 states and 1804 transitions. [2021-12-17 23:26:52,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 1334 transitions, 30142 flow [2021-12-17 23:26:53,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 1334 transitions, 29807 flow, removed 21 selfloop flow, removed 32 redundant places. [2021-12-17 23:26:53,732 INFO L242 Difference]: Finished difference. Result has 907 places, 1250 transitions, 26315 flow [2021-12-17 23:26:53,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26830, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26315, PETRI_PLACES=907, PETRI_TRANSITIONS=1250} [2021-12-17 23:26:53,733 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 819 predicate places. [2021-12-17 23:26:53,733 INFO L470 AbstractCegarLoop]: Abstraction has has 907 places, 1250 transitions, 26315 flow [2021-12-17 23:26:53,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:53,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:53,733 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] [2021-12-17 23:26:53,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-12-17 23:26:53,734 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 254062662, now seen corresponding path program 202 times [2021-12-17 23:26:53,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75311575] [2021-12-17 23:26:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:53,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:53,990 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 23:26:53,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75311575] [2021-12-17 23:26:53,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75311575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:53,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:53,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:26:53,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742945850] [2021-12-17 23:26:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:53,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:26:53,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:26:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:26:53,991 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:53,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 907 places, 1250 transitions, 26315 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:53,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:53,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:53,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:26:56,848 INFO L129 PetriNetUnfolder]: 814/2572 cut-off events. [2021-12-17 23:26:56,849 INFO L130 PetriNetUnfolder]: For 124536/124536 co-relation queries the response was YES. [2021-12-17 23:26:56,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28315 conditions, 2572 events. 814/2572 cut-off events. For 124536/124536 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21262 event pairs, 50 based on Foata normal form. 1/2570 useless extension candidates. Maximal degree in co-relation 27985. Up to 1822 conditions per place. [2021-12-17 23:26:56,920 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1035 selfloop transitions, 180 changer transitions 33/1287 dead transitions. [2021-12-17 23:26:56,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 1287 transitions, 29312 flow [2021-12-17 23:26:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:26:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:26:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2021-12-17 23:26:56,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2021-12-17 23:26:56,922 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2021-12-17 23:26:56,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2021-12-17 23:26:56,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:26:56,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2021-12-17 23:26:56,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 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 23:26:56,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:26:56,925 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:26:56,925 INFO L186 Difference]: Start difference. First operand has 907 places, 1250 transitions, 26315 flow. Second operand 35 states and 1853 transitions. [2021-12-17 23:26:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 1287 transitions, 29312 flow [2021-12-17 23:26:58,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 1287 transitions, 28417 flow, removed 131 selfloop flow, removed 38 redundant places. [2021-12-17 23:26:58,428 INFO L242 Difference]: Finished difference. Result has 897 places, 1233 transitions, 25498 flow [2021-12-17 23:26:58,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25450, PETRI_DIFFERENCE_MINUEND_PLACES=856, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25498, PETRI_PLACES=897, PETRI_TRANSITIONS=1233} [2021-12-17 23:26:58,428 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 809 predicate places. [2021-12-17 23:26:58,428 INFO L470 AbstractCegarLoop]: Abstraction has has 897 places, 1233 transitions, 25498 flow [2021-12-17 23:26:58,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:26:58,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:26:58,429 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] [2021-12-17 23:26:58,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-12-17 23:26:58,429 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:26:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:26:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -507218906, now seen corresponding path program 203 times [2021-12-17 23:26:58,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:26:58,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290735509] [2021-12-17 23:26:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:26:58,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:26:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:26:58,684 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 23:26:58,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:26:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290735509] [2021-12-17 23:26:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290735509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:26:58,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:26:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:26:58,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728160460] [2021-12-17 23:26:58,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:26:58,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:26:58,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:26:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:26:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:26:58,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:26:58,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 897 places, 1233 transitions, 25498 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:26:58,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:26:58,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:26:58,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:01,241 INFO L129 PetriNetUnfolder]: 815/2570 cut-off events. [2021-12-17 23:27:01,241 INFO L130 PetriNetUnfolder]: For 128191/128191 co-relation queries the response was YES. [2021-12-17 23:27:01,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28339 conditions, 2570 events. 815/2570 cut-off events. For 128191/128191 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21285 event pairs, 45 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 28013. Up to 1746 conditions per place. [2021-12-17 23:27:01,318 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 981 selfloop transitions, 255 changer transitions 22/1297 dead transitions. [2021-12-17 23:27:01,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 925 places, 1297 transitions, 29676 flow [2021-12-17 23:27:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:27:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:27:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1967 transitions. [2021-12-17 23:27:01,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5655549166187464 [2021-12-17 23:27:01,319 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1967 transitions. [2021-12-17 23:27:01,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1967 transitions. [2021-12-17 23:27:01,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:01,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1967 transitions. [2021-12-17 23:27:01,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.16216216216216) internal successors, (1967), 37 states have internal predecessors, (1967), 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 23:27:01,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:27:01,323 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:27:01,323 INFO L186 Difference]: Start difference. First operand has 897 places, 1233 transitions, 25498 flow. Second operand 37 states and 1967 transitions. [2021-12-17 23:27:01,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 925 places, 1297 transitions, 29676 flow [2021-12-17 23:27:02,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 888 places, 1297 transitions, 29133 flow, removed 21 selfloop flow, removed 37 redundant places. [2021-12-17 23:27:02,794 INFO L242 Difference]: Finished difference. Result has 898 places, 1247 transitions, 26197 flow [2021-12-17 23:27:02,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24988, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26197, PETRI_PLACES=898, PETRI_TRANSITIONS=1247} [2021-12-17 23:27:02,795 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 810 predicate places. [2021-12-17 23:27:02,795 INFO L470 AbstractCegarLoop]: Abstraction has has 898 places, 1247 transitions, 26197 flow [2021-12-17 23:27:02,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:02,795 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:02,795 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] [2021-12-17 23:27:02,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-12-17 23:27:02,795 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 621154900, now seen corresponding path program 204 times [2021-12-17 23:27:02,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406500693] [2021-12-17 23:27:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:02,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:03,064 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 23:27:03,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406500693] [2021-12-17 23:27:03,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406500693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:03,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:03,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:27:03,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28133820] [2021-12-17 23:27:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:03,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:27:03,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:27:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:27:03,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:03,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 898 places, 1247 transitions, 26197 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:27:03,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:03,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:03,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:05,461 INFO L129 PetriNetUnfolder]: 816/2570 cut-off events. [2021-12-17 23:27:05,461 INFO L130 PetriNetUnfolder]: For 131722/131722 co-relation queries the response was YES. [2021-12-17 23:27:05,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28600 conditions, 2570 events. 816/2570 cut-off events. For 131722/131722 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21247 event pairs, 41 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 28272. Up to 1936 conditions per place. [2021-12-17 23:27:05,540 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1120 selfloop transitions, 117 changer transitions 20/1296 dead transitions. [2021-12-17 23:27:05,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 925 places, 1296 transitions, 30050 flow [2021-12-17 23:27:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:27:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:27:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-12-17 23:27:05,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-12-17 23:27:05,541 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-12-17 23:27:05,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-12-17 23:27:05,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:05,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-12-17 23:27:05,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 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 23:27:05,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:05,545 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:05,545 INFO L186 Difference]: Start difference. First operand has 898 places, 1247 transitions, 26197 flow. Second operand 34 states and 1817 transitions. [2021-12-17 23:27:05,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 925 places, 1296 transitions, 30050 flow [2021-12-17 23:27:07,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 1296 transitions, 29236 flow, removed 208 selfloop flow, removed 30 redundant places. [2021-12-17 23:27:07,136 INFO L242 Difference]: Finished difference. Result has 902 places, 1256 transitions, 26089 flow [2021-12-17 23:27:07,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25405, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26089, PETRI_PLACES=902, PETRI_TRANSITIONS=1256} [2021-12-17 23:27:07,137 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 814 predicate places. [2021-12-17 23:27:07,137 INFO L470 AbstractCegarLoop]: Abstraction has has 902 places, 1256 transitions, 26089 flow [2021-12-17 23:27:07,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:27:07,137 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:07,137 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] [2021-12-17 23:27:07,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-12-17 23:27:07,138 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1307471408, now seen corresponding path program 205 times [2021-12-17 23:27:07,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691518261] [2021-12-17 23:27:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:07,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:07,418 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 23:27:07,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:07,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691518261] [2021-12-17 23:27:07,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691518261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:07,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:07,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:27:07,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866576032] [2021-12-17 23:27:07,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:07,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:27:07,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:27:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:27:07,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:07,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 1256 transitions, 26089 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:07,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:07,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:07,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:09,856 INFO L129 PetriNetUnfolder]: 816/2569 cut-off events. [2021-12-17 23:27:09,856 INFO L130 PetriNetUnfolder]: For 127805/127805 co-relation queries the response was YES. [2021-12-17 23:27:09,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28378 conditions, 2569 events. 816/2569 cut-off events. For 127805/127805 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21237 event pairs, 52 based on Foata normal form. 1/2567 useless extension candidates. Maximal degree in co-relation 28049. Up to 1937 conditions per place. [2021-12-17 23:27:09,928 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1119 selfloop transitions, 116 changer transitions 26/1300 dead transitions. [2021-12-17 23:27:09,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 1300 transitions, 29560 flow [2021-12-17 23:27:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:27:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:27:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1964 transitions. [2021-12-17 23:27:09,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5646923519263944 [2021-12-17 23:27:09,930 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1964 transitions. [2021-12-17 23:27:09,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1964 transitions. [2021-12-17 23:27:09,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:09,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1964 transitions. [2021-12-17 23:27:09,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.08108108108108) internal successors, (1964), 37 states have internal predecessors, (1964), 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 23:27:09,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:27:09,933 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:27:09,933 INFO L186 Difference]: Start difference. First operand has 902 places, 1256 transitions, 26089 flow. Second operand 37 states and 1964 transitions. [2021-12-17 23:27:09,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 1300 transitions, 29560 flow [2021-12-17 23:27:11,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 906 places, 1300 transitions, 29077 flow, removed 155 selfloop flow, removed 27 redundant places. [2021-12-17 23:27:11,485 INFO L242 Difference]: Finished difference. Result has 918 places, 1259 transitions, 26014 flow [2021-12-17 23:27:11,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25629, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26014, PETRI_PLACES=918, PETRI_TRANSITIONS=1259} [2021-12-17 23:27:11,486 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 830 predicate places. [2021-12-17 23:27:11,486 INFO L470 AbstractCegarLoop]: Abstraction has has 918 places, 1259 transitions, 26014 flow [2021-12-17 23:27:11,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:11,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:11,487 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] [2021-12-17 23:27:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-12-17 23:27:11,487 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1007806394, now seen corresponding path program 206 times [2021-12-17 23:27:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107339962] [2021-12-17 23:27:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:11,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:11,798 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 23:27:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107339962] [2021-12-17 23:27:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107339962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:11,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:11,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:27:11,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041930274] [2021-12-17 23:27:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:11,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:27:11,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:27:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:27:11,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:11,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 1259 transitions, 26014 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:27:11,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:11,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:11,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:14,894 INFO L129 PetriNetUnfolder]: 834/2617 cut-off events. [2021-12-17 23:27:14,894 INFO L130 PetriNetUnfolder]: For 142058/142058 co-relation queries the response was YES. [2021-12-17 23:27:14,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29735 conditions, 2617 events. 834/2617 cut-off events. For 142058/142058 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21708 event pairs, 47 based on Foata normal form. 1/2615 useless extension candidates. Maximal degree in co-relation 29399. Up to 1668 conditions per place. [2021-12-17 23:27:14,952 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 925 selfloop transitions, 356 changer transitions 22/1342 dead transitions. [2021-12-17 23:27:14,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 1342 transitions, 31815 flow [2021-12-17 23:27:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 23:27:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-17 23:27:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2783 transitions. [2021-12-17 23:27:14,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5586109995985548 [2021-12-17 23:27:14,954 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2783 transitions. [2021-12-17 23:27:14,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2783 transitions. [2021-12-17 23:27:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2783 transitions. [2021-12-17 23:27:14,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 52.509433962264154) internal successors, (2783), 53 states have internal predecessors, (2783), 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 23:27:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 94.0) internal successors, (5076), 54 states have internal predecessors, (5076), 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 23:27:14,958 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 94.0) internal successors, (5076), 54 states have internal predecessors, (5076), 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 23:27:14,958 INFO L186 Difference]: Start difference. First operand has 918 places, 1259 transitions, 26014 flow. Second operand 53 states and 2783 transitions. [2021-12-17 23:27:14,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 1342 transitions, 31815 flow [2021-12-17 23:27:16,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 928 places, 1342 transitions, 31367 flow, removed 91 selfloop flow, removed 34 redundant places. [2021-12-17 23:27:16,553 INFO L242 Difference]: Finished difference. Result has 938 places, 1300 transitions, 28507 flow [2021-12-17 23:27:16,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25647, PETRI_DIFFERENCE_MINUEND_PLACES=876, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=28507, PETRI_PLACES=938, PETRI_TRANSITIONS=1300} [2021-12-17 23:27:16,553 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 850 predicate places. [2021-12-17 23:27:16,553 INFO L470 AbstractCegarLoop]: Abstraction has has 938 places, 1300 transitions, 28507 flow [2021-12-17 23:27:16,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:27:16,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:16,553 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] [2021-12-17 23:27:16,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-12-17 23:27:16,554 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1373343314, now seen corresponding path program 207 times [2021-12-17 23:27:16,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:16,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093124535] [2021-12-17 23:27:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:16,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:16,840 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 23:27:16,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093124535] [2021-12-17 23:27:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093124535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:16,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:16,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:27:16,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028241473] [2021-12-17 23:27:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:16,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:27:16,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:27:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:27:16,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:16,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 1300 transitions, 28507 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:27:16,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:16,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:16,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:21,227 INFO L129 PetriNetUnfolder]: 903/2895 cut-off events. [2021-12-17 23:27:21,228 INFO L130 PetriNetUnfolder]: For 172202/172202 co-relation queries the response was YES. [2021-12-17 23:27:21,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33808 conditions, 2895 events. 903/2895 cut-off events. For 172202/172202 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 25020 event pairs, 45 based on Foata normal form. 1/2893 useless extension candidates. Maximal degree in co-relation 33472. Up to 1881 conditions per place. [2021-12-17 23:27:21,316 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1096 selfloop transitions, 323 changer transitions 25/1483 dead transitions. [2021-12-17 23:27:21,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 1483 transitions, 37283 flow [2021-12-17 23:27:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 23:27:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-17 23:27:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2631 transitions. [2021-12-17 23:27:21,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5597872340425532 [2021-12-17 23:27:21,318 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2631 transitions. [2021-12-17 23:27:21,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2631 transitions. [2021-12-17 23:27:21,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:21,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2631 transitions. [2021-12-17 23:27:21,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 52.62) internal successors, (2631), 50 states have internal predecessors, (2631), 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 23:27:21,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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 23:27:21,323 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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 23:27:21,324 INFO L186 Difference]: Start difference. First operand has 938 places, 1300 transitions, 28507 flow. Second operand 50 states and 2631 transitions. [2021-12-17 23:27:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 1483 transitions, 37283 flow [2021-12-17 23:27:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 951 places, 1483 transitions, 34985 flow, removed 1026 selfloop flow, removed 30 redundant places. [2021-12-17 23:27:23,491 INFO L242 Difference]: Finished difference. Result has 963 places, 1421 transitions, 31616 flow [2021-12-17 23:27:23,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=27023, PETRI_DIFFERENCE_MINUEND_PLACES=902, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=31616, PETRI_PLACES=963, PETRI_TRANSITIONS=1421} [2021-12-17 23:27:23,492 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 875 predicate places. [2021-12-17 23:27:23,492 INFO L470 AbstractCegarLoop]: Abstraction has has 963 places, 1421 transitions, 31616 flow [2021-12-17 23:27:23,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:27:23,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:23,492 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] [2021-12-17 23:27:23,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-12-17 23:27:23,492 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1440216572, now seen corresponding path program 208 times [2021-12-17 23:27:23,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583460951] [2021-12-17 23:27:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:23,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:23,770 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 23:27:23,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:23,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583460951] [2021-12-17 23:27:23,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583460951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:23,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:23,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:27:23,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660755618] [2021-12-17 23:27:23,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:23,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:27:23,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:27:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:27:23,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:23,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 1421 transitions, 31616 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:23,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:23,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:23,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:26,610 INFO L129 PetriNetUnfolder]: 903/2904 cut-off events. [2021-12-17 23:27:26,610 INFO L130 PetriNetUnfolder]: For 170929/170929 co-relation queries the response was YES. [2021-12-17 23:27:26,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33507 conditions, 2904 events. 903/2904 cut-off events. For 170929/170929 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 25122 event pairs, 42 based on Foata normal form. 1/2902 useless extension candidates. Maximal degree in co-relation 33162. Up to 2101 conditions per place. [2021-12-17 23:27:26,699 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1245 selfloop transitions, 165 changer transitions 33/1482 dead transitions. [2021-12-17 23:27:26,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 1482 transitions, 35870 flow [2021-12-17 23:27:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:27:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:27:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2021 transitions. [2021-12-17 23:27:26,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2021-12-17 23:27:26,701 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2021 transitions. [2021-12-17 23:27:26,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2021 transitions. [2021-12-17 23:27:26,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:26,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2021 transitions. [2021-12-17 23:27:26,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 53.18421052631579) internal successors, (2021), 38 states have internal predecessors, (2021), 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 23:27:26,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:27:26,705 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:27:26,705 INFO L186 Difference]: Start difference. First operand has 963 places, 1421 transitions, 31616 flow. Second operand 38 states and 2021 transitions. [2021-12-17 23:27:26,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 1482 transitions, 35870 flow [2021-12-17 23:27:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 959 places, 1482 transitions, 34815 flow, removed 397 selfloop flow, removed 35 redundant places. [2021-12-17 23:27:28,705 INFO L242 Difference]: Finished difference. Result has 971 places, 1428 transitions, 31196 flow [2021-12-17 23:27:28,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30565, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31196, PETRI_PLACES=971, PETRI_TRANSITIONS=1428} [2021-12-17 23:27:28,706 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 883 predicate places. [2021-12-17 23:27:28,706 INFO L470 AbstractCegarLoop]: Abstraction has has 971 places, 1428 transitions, 31196 flow [2021-12-17 23:27:28,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:28,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:28,706 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] [2021-12-17 23:27:28,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-12-17 23:27:28,706 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 128715734, now seen corresponding path program 209 times [2021-12-17 23:27:28,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:28,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175162256] [2021-12-17 23:27:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:28,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:28,947 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 23:27:28,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175162256] [2021-12-17 23:27:28,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175162256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:28,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:28,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:27:28,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172981278] [2021-12-17 23:27:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:28,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:27:28,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:27:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:27:28,949 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:28,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 1428 transitions, 31196 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:28,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:28,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:28,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:31,486 INFO L129 PetriNetUnfolder]: 890/2889 cut-off events. [2021-12-17 23:27:31,486 INFO L130 PetriNetUnfolder]: For 164863/164863 co-relation queries the response was YES. [2021-12-17 23:27:31,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32866 conditions, 2889 events. 890/2889 cut-off events. For 164863/164863 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 25059 event pairs, 41 based on Foata normal form. 1/2887 useless extension candidates. Maximal degree in co-relation 32510. Up to 1987 conditions per place. [2021-12-17 23:27:31,578 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1174 selfloop transitions, 213 changer transitions 41/1467 dead transitions. [2021-12-17 23:27:31,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 1467 transitions, 34734 flow [2021-12-17 23:27:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:27:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:27:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1808 transitions. [2021-12-17 23:27:31,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657071339173968 [2021-12-17 23:27:31,579 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1808 transitions. [2021-12-17 23:27:31,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1808 transitions. [2021-12-17 23:27:31,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:31,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1808 transitions. [2021-12-17 23:27:31,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.1764705882353) internal successors, (1808), 34 states have internal predecessors, (1808), 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 23:27:31,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:31,582 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:31,582 INFO L186 Difference]: Start difference. First operand has 971 places, 1428 transitions, 31196 flow. Second operand 34 states and 1808 transitions. [2021-12-17 23:27:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 1467 transitions, 34734 flow [2021-12-17 23:27:33,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 1467 transitions, 34243 flow, removed 78 selfloop flow, removed 32 redundant places. [2021-12-17 23:27:33,626 INFO L242 Difference]: Finished difference. Result has 971 places, 1406 transitions, 30877 flow [2021-12-17 23:27:33,627 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30723, PETRI_DIFFERENCE_MINUEND_PLACES=931, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=30877, PETRI_PLACES=971, PETRI_TRANSITIONS=1406} [2021-12-17 23:27:33,627 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 883 predicate places. [2021-12-17 23:27:33,627 INFO L470 AbstractCegarLoop]: Abstraction has has 971 places, 1406 transitions, 30877 flow [2021-12-17 23:27:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:33,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:33,627 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] [2021-12-17 23:27:33,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-12-17 23:27:33,628 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1831133752, now seen corresponding path program 210 times [2021-12-17 23:27:33,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683445655] [2021-12-17 23:27:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:33,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:33,882 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 23:27:33,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683445655] [2021-12-17 23:27:33,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683445655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:33,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:33,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:27:33,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011556050] [2021-12-17 23:27:33,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:33,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:27:33,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:27:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:27:33,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:33,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 1406 transitions, 30877 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:27:33,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:33,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:33,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:36,539 INFO L129 PetriNetUnfolder]: 882/2856 cut-off events. [2021-12-17 23:27:36,540 INFO L130 PetriNetUnfolder]: For 163551/163551 co-relation queries the response was YES. [2021-12-17 23:27:36,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32902 conditions, 2856 events. 882/2856 cut-off events. For 163551/163551 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 24753 event pairs, 41 based on Foata normal form. 1/2854 useless extension candidates. Maximal degree in co-relation 32549. Up to 2140 conditions per place. [2021-12-17 23:27:36,628 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1267 selfloop transitions, 123 changer transitions 29/1458 dead transitions. [2021-12-17 23:27:36,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 1458 transitions, 35032 flow [2021-12-17 23:27:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:27:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:27:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1713 transitions. [2021-12-17 23:27:36,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5694813829787234 [2021-12-17 23:27:36,629 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1713 transitions. [2021-12-17 23:27:36,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1713 transitions. [2021-12-17 23:27:36,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:36,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1713 transitions. [2021-12-17 23:27:36,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.53125) internal successors, (1713), 32 states have internal predecessors, (1713), 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 23:27:36,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:27:36,632 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:27:36,632 INFO L186 Difference]: Start difference. First operand has 971 places, 1406 transitions, 30877 flow. Second operand 32 states and 1713 transitions. [2021-12-17 23:27:36,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 1458 transitions, 35032 flow [2021-12-17 23:27:38,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 954 places, 1458 transitions, 34359 flow, removed 57 selfloop flow, removed 37 redundant places. [2021-12-17 23:27:38,715 INFO L242 Difference]: Finished difference. Result has 964 places, 1411 transitions, 30883 flow [2021-12-17 23:27:38,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30242, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=30883, PETRI_PLACES=964, PETRI_TRANSITIONS=1411} [2021-12-17 23:27:38,716 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 876 predicate places. [2021-12-17 23:27:38,716 INFO L470 AbstractCegarLoop]: Abstraction has has 964 places, 1411 transitions, 30883 flow [2021-12-17 23:27:38,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:27:38,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:38,717 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] [2021-12-17 23:27:38,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-12-17 23:27:38,717 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1365889550, now seen corresponding path program 211 times [2021-12-17 23:27:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:38,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993627069] [2021-12-17 23:27:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:38,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:38,987 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 23:27:38,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993627069] [2021-12-17 23:27:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993627069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:38,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:27:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985733288] [2021-12-17 23:27:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:27:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:27:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:27:38,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:38,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 964 places, 1411 transitions, 30883 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:38,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:38,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:38,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:41,754 INFO L129 PetriNetUnfolder]: 876/2852 cut-off events. [2021-12-17 23:27:41,754 INFO L130 PetriNetUnfolder]: For 164024/164024 co-relation queries the response was YES. [2021-12-17 23:27:41,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32632 conditions, 2852 events. 876/2852 cut-off events. For 164024/164024 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24664 event pairs, 42 based on Foata normal form. 1/2850 useless extension candidates. Maximal degree in co-relation 32280. Up to 2140 conditions per place. [2021-12-17 23:27:41,837 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1266 selfloop transitions, 125 changer transitions 18/1448 dead transitions. [2021-12-17 23:27:41,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 1448 transitions, 34656 flow [2021-12-17 23:27:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:27:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:27:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1911 transitions. [2021-12-17 23:27:41,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647163120567376 [2021-12-17 23:27:41,839 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1911 transitions. [2021-12-17 23:27:41,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1911 transitions. [2021-12-17 23:27:41,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:41,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1911 transitions. [2021-12-17 23:27:41,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.083333333333336) internal successors, (1911), 36 states have internal predecessors, (1911), 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 23:27:41,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:27:41,842 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:27:41,842 INFO L186 Difference]: Start difference. First operand has 964 places, 1411 transitions, 30883 flow. Second operand 36 states and 1911 transitions. [2021-12-17 23:27:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 990 places, 1448 transitions, 34656 flow [2021-12-17 23:27:43,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 1448 transitions, 34228 flow, removed 132 selfloop flow, removed 25 redundant places. [2021-12-17 23:27:43,797 INFO L242 Difference]: Finished difference. Result has 972 places, 1413 transitions, 30934 flow [2021-12-17 23:27:43,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30489, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=30934, PETRI_PLACES=972, PETRI_TRANSITIONS=1413} [2021-12-17 23:27:43,798 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 884 predicate places. [2021-12-17 23:27:43,798 INFO L470 AbstractCegarLoop]: Abstraction has has 972 places, 1413 transitions, 30934 flow [2021-12-17 23:27:43,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:43,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:43,799 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] [2021-12-17 23:27:43,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-12-17 23:27:43,799 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash -648545844, now seen corresponding path program 212 times [2021-12-17 23:27:43,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:43,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883443905] [2021-12-17 23:27:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:43,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:44,072 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 23:27:44,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883443905] [2021-12-17 23:27:44,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883443905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:44,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:44,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:27:44,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849058895] [2021-12-17 23:27:44,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:44,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:27:44,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:27:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:27:44,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:44,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 1413 transitions, 30934 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:44,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:44,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:44,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:47,319 INFO L129 PetriNetUnfolder]: 891/2900 cut-off events. [2021-12-17 23:27:47,319 INFO L130 PetriNetUnfolder]: For 167296/167296 co-relation queries the response was YES. [2021-12-17 23:27:47,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33243 conditions, 2900 events. 891/2900 cut-off events. For 167296/167296 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 25235 event pairs, 43 based on Foata normal form. 1/2898 useless extension candidates. Maximal degree in co-relation 32891. Up to 2022 conditions per place. [2021-12-17 23:27:47,389 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1180 selfloop transitions, 242 changer transitions 33/1494 dead transitions. [2021-12-17 23:27:47,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 1494 transitions, 35904 flow [2021-12-17 23:27:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:27:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:27:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2117 transitions. [2021-12-17 23:27:47,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.563031914893617 [2021-12-17 23:27:47,391 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2117 transitions. [2021-12-17 23:27:47,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2117 transitions. [2021-12-17 23:27:47,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:47,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2117 transitions. [2021-12-17 23:27:47,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.925) internal successors, (2117), 40 states have internal predecessors, (2117), 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 23:27:47,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:27:47,395 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:27:47,395 INFO L186 Difference]: Start difference. First operand has 972 places, 1413 transitions, 30934 flow. Second operand 40 states and 2117 transitions. [2021-12-17 23:27:47,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 1494 transitions, 35904 flow [2021-12-17 23:27:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 1494 transitions, 35524 flow, removed 96 selfloop flow, removed 32 redundant places. [2021-12-17 23:27:49,434 INFO L242 Difference]: Finished difference. Result has 987 places, 1440 transitions, 32187 flow [2021-12-17 23:27:49,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30588, PETRI_DIFFERENCE_MINUEND_PLACES=935, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=32187, PETRI_PLACES=987, PETRI_TRANSITIONS=1440} [2021-12-17 23:27:49,435 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 899 predicate places. [2021-12-17 23:27:49,435 INFO L470 AbstractCegarLoop]: Abstraction has has 987 places, 1440 transitions, 32187 flow [2021-12-17 23:27:49,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:27:49,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:49,436 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] [2021-12-17 23:27:49,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-12-17 23:27:49,436 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash -300489632, now seen corresponding path program 213 times [2021-12-17 23:27:49,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:49,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482516435] [2021-12-17 23:27:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:49,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:49,716 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 23:27:49,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:49,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482516435] [2021-12-17 23:27:49,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482516435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:49,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:49,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:27:49,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118509917] [2021-12-17 23:27:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:49,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:27:49,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:27:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:27:49,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:49,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 1440 transitions, 32187 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:27:49,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:49,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:49,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:52,458 INFO L129 PetriNetUnfolder]: 878/2867 cut-off events. [2021-12-17 23:27:52,458 INFO L130 PetriNetUnfolder]: For 162827/162827 co-relation queries the response was YES. [2021-12-17 23:27:52,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32990 conditions, 2867 events. 878/2867 cut-off events. For 162827/162827 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24904 event pairs, 43 based on Foata normal form. 1/2864 useless extension candidates. Maximal degree in co-relation 32630. Up to 2162 conditions per place. [2021-12-17 23:27:52,555 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1300 selfloop transitions, 122 changer transitions 15/1476 dead transitions. [2021-12-17 23:27:52,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1012 places, 1476 transitions, 35764 flow [2021-12-17 23:27:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:27:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:27:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1803 transitions. [2021-12-17 23:27:52,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564142678347935 [2021-12-17 23:27:52,557 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1803 transitions. [2021-12-17 23:27:52,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1803 transitions. [2021-12-17 23:27:52,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:52,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1803 transitions. [2021-12-17 23:27:52,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.029411764705884) internal successors, (1803), 34 states have internal predecessors, (1803), 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 23:27:52,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:52,560 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:52,560 INFO L186 Difference]: Start difference. First operand has 987 places, 1440 transitions, 32187 flow. Second operand 34 states and 1803 transitions. [2021-12-17 23:27:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1012 places, 1476 transitions, 35764 flow [2021-12-17 23:27:54,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 981 places, 1476 transitions, 35202 flow, removed 134 selfloop flow, removed 31 redundant places. [2021-12-17 23:27:54,887 INFO L242 Difference]: Finished difference. Result has 989 places, 1443 transitions, 32202 flow [2021-12-17 23:27:54,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31643, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=32202, PETRI_PLACES=989, PETRI_TRANSITIONS=1443} [2021-12-17 23:27:54,888 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 901 predicate places. [2021-12-17 23:27:54,888 INFO L470 AbstractCegarLoop]: Abstraction has has 989 places, 1443 transitions, 32202 flow [2021-12-17 23:27:54,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:27:54,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:27:54,888 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] [2021-12-17 23:27:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-12-17 23:27:54,888 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:27:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:27:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash 795999366, now seen corresponding path program 214 times [2021-12-17 23:27:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:27:54,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287321419] [2021-12-17 23:27:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:27:54,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:27:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:27:55,169 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 23:27:55,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:27:55,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287321419] [2021-12-17 23:27:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287321419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:27:55,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:27:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:27:55,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399914909] [2021-12-17 23:27:55,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:27:55,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:27:55,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:27:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:27:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:27:55,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:27:55,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 989 places, 1443 transitions, 32202 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:27:55,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:27:55,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:27:55,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:27:58,008 INFO L129 PetriNetUnfolder]: 877/2869 cut-off events. [2021-12-17 23:27:58,008 INFO L130 PetriNetUnfolder]: For 159336/159336 co-relation queries the response was YES. [2021-12-17 23:27:58,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32857 conditions, 2869 events. 877/2869 cut-off events. For 159336/159336 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24900 event pairs, 39 based on Foata normal form. 1/2868 useless extension candidates. Maximal degree in co-relation 32496. Up to 2130 conditions per place. [2021-12-17 23:27:58,102 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1277 selfloop transitions, 140 changer transitions 21/1477 dead transitions. [2021-12-17 23:27:58,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 1477 transitions, 35571 flow [2021-12-17 23:27:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:27:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:27:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1809 transitions. [2021-12-17 23:27:58,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5660200250312891 [2021-12-17 23:27:58,104 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1809 transitions. [2021-12-17 23:27:58,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1809 transitions. [2021-12-17 23:27:58,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:27:58,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1809 transitions. [2021-12-17 23:27:58,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.205882352941174) internal successors, (1809), 34 states have internal predecessors, (1809), 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 23:27:58,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:58,107 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:27:58,107 INFO L186 Difference]: Start difference. First operand has 989 places, 1443 transitions, 32202 flow. Second operand 34 states and 1809 transitions. [2021-12-17 23:27:58,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 1477 transitions, 35571 flow [2021-12-17 23:28:00,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 990 places, 1477 transitions, 35135 flow, removed 131 selfloop flow, removed 25 redundant places. [2021-12-17 23:28:00,632 INFO L242 Difference]: Finished difference. Result has 998 places, 1438 transitions, 32092 flow [2021-12-17 23:28:00,633 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31774, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=32092, PETRI_PLACES=998, PETRI_TRANSITIONS=1438} [2021-12-17 23:28:00,633 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 910 predicate places. [2021-12-17 23:28:00,633 INFO L470 AbstractCegarLoop]: Abstraction has has 998 places, 1438 transitions, 32092 flow [2021-12-17 23:28:00,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:00,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:00,633 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] [2021-12-17 23:28:00,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-12-17 23:28:00,633 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1249827058, now seen corresponding path program 215 times [2021-12-17 23:28:00,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:00,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120909012] [2021-12-17 23:28:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:00,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:00,914 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 23:28:00,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120909012] [2021-12-17 23:28:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120909012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:00,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:00,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:28:00,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063309537] [2021-12-17 23:28:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:00,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:28:00,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:28:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:28:00,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:00,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 1438 transitions, 32092 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:00,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:00,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:00,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:03,896 INFO L129 PetriNetUnfolder]: 867/2838 cut-off events. [2021-12-17 23:28:03,896 INFO L130 PetriNetUnfolder]: For 156803/156803 co-relation queries the response was YES. [2021-12-17 23:28:03,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32636 conditions, 2838 events. 867/2838 cut-off events. For 156803/156803 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 24602 event pairs, 40 based on Foata normal form. 1/2837 useless extension candidates. Maximal degree in co-relation 32270. Up to 2124 conditions per place. [2021-12-17 23:28:03,992 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1279 selfloop transitions, 123 changer transitions 23/1464 dead transitions. [2021-12-17 23:28:03,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 1464 transitions, 35140 flow [2021-12-17 23:28:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:28:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:28:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2021-12-17 23:28:03,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2021-12-17 23:28:03,993 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2021-12-17 23:28:03,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2021-12-17 23:28:03,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:03,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2021-12-17 23:28:03,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 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 23:28:03,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:03,996 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:03,996 INFO L186 Difference]: Start difference. First operand has 998 places, 1438 transitions, 32092 flow. Second operand 31 states and 1657 transitions. [2021-12-17 23:28:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 1464 transitions, 35140 flow [2021-12-17 23:28:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 991 places, 1464 transitions, 34811 flow, removed 28 selfloop flow, removed 31 redundant places. [2021-12-17 23:28:06,357 INFO L242 Difference]: Finished difference. Result has 995 places, 1423 transitions, 31820 flow [2021-12-17 23:28:06,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31769, PETRI_DIFFERENCE_MINUEND_PLACES=961, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31820, PETRI_PLACES=995, PETRI_TRANSITIONS=1423} [2021-12-17 23:28:06,358 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 907 predicate places. [2021-12-17 23:28:06,358 INFO L470 AbstractCegarLoop]: Abstraction has has 995 places, 1423 transitions, 31820 flow [2021-12-17 23:28:06,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:06,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:06,358 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] [2021-12-17 23:28:06,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-12-17 23:28:06,358 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1592080624, now seen corresponding path program 216 times [2021-12-17 23:28:06,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:06,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040224595] [2021-12-17 23:28:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:06,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:06,636 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 23:28:06,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:06,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040224595] [2021-12-17 23:28:06,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040224595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:06,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:06,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:28:06,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958143157] [2021-12-17 23:28:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:06,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:28:06,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:06,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:28:06,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:28:06,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:06,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1423 transitions, 31820 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:06,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:06,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:06,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:09,293 INFO L129 PetriNetUnfolder]: 860/2807 cut-off events. [2021-12-17 23:28:09,293 INFO L130 PetriNetUnfolder]: For 156558/156558 co-relation queries the response was YES. [2021-12-17 23:28:09,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32377 conditions, 2807 events. 860/2807 cut-off events. For 156558/156558 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 24226 event pairs, 40 based on Foata normal form. 1/2805 useless extension candidates. Maximal degree in co-relation 32014. Up to 2121 conditions per place. [2021-12-17 23:28:09,391 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1273 selfloop transitions, 111 changer transitions 25/1448 dead transitions. [2021-12-17 23:28:09,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1013 places, 1448 transitions, 34837 flow [2021-12-17 23:28:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:28:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:28:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1600 transitions. [2021-12-17 23:28:09,392 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2021-12-17 23:28:09,392 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1600 transitions. [2021-12-17 23:28:09,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1600 transitions. [2021-12-17 23:28:09,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:09,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1600 transitions. [2021-12-17 23:28:09,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.333333333333336) internal successors, (1600), 30 states have internal predecessors, (1600), 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 23:28:09,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:28:09,395 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:28:09,395 INFO L186 Difference]: Start difference. First operand has 995 places, 1423 transitions, 31820 flow. Second operand 30 states and 1600 transitions. [2021-12-17 23:28:09,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1013 places, 1448 transitions, 34837 flow [2021-12-17 23:28:11,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 980 places, 1448 transitions, 34459 flow, removed 23 selfloop flow, removed 33 redundant places. [2021-12-17 23:28:11,693 INFO L242 Difference]: Finished difference. Result has 985 places, 1407 transitions, 31447 flow [2021-12-17 23:28:11,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31455, PETRI_DIFFERENCE_MINUEND_PLACES=951, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=31447, PETRI_PLACES=985, PETRI_TRANSITIONS=1407} [2021-12-17 23:28:11,694 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 897 predicate places. [2021-12-17 23:28:11,694 INFO L470 AbstractCegarLoop]: Abstraction has has 985 places, 1407 transitions, 31447 flow [2021-12-17 23:28:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:11,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:11,695 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] [2021-12-17 23:28:11,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-12-17 23:28:11,695 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash -414102746, now seen corresponding path program 217 times [2021-12-17 23:28:11,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:11,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140585350] [2021-12-17 23:28:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:11,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:11,985 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 23:28:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140585350] [2021-12-17 23:28:11,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140585350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:11,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:11,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:28:11,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977671318] [2021-12-17 23:28:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:28:11,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:28:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:28:11,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:11,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 985 places, 1407 transitions, 31447 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:11,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:11,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:11,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:14,790 INFO L129 PetriNetUnfolder]: 855/2781 cut-off events. [2021-12-17 23:28:14,790 INFO L130 PetriNetUnfolder]: For 153882/153882 co-relation queries the response was YES. [2021-12-17 23:28:14,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32118 conditions, 2781 events. 855/2781 cut-off events. For 153882/153882 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23946 event pairs, 38 based on Foata normal form. 1/2779 useless extension candidates. Maximal degree in co-relation 31757. Up to 2118 conditions per place. [2021-12-17 23:28:14,876 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1269 selfloop transitions, 105 changer transitions 17/1430 dead transitions. [2021-12-17 23:28:14,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1003 places, 1430 transitions, 34407 flow [2021-12-17 23:28:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:28:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:28:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1644 transitions. [2021-12-17 23:28:14,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641729581331503 [2021-12-17 23:28:14,878 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1644 transitions. [2021-12-17 23:28:14,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1644 transitions. [2021-12-17 23:28:14,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:14,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1644 transitions. [2021-12-17 23:28:14,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.03225806451613) internal successors, (1644), 31 states have internal predecessors, (1644), 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 23:28:14,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:14,881 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:14,881 INFO L186 Difference]: Start difference. First operand has 985 places, 1407 transitions, 31447 flow. Second operand 31 states and 1644 transitions. [2021-12-17 23:28:14,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1003 places, 1430 transitions, 34407 flow [2021-12-17 23:28:16,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 968 places, 1430 transitions, 34044 flow, removed 20 selfloop flow, removed 35 redundant places. [2021-12-17 23:28:16,938 INFO L242 Difference]: Finished difference. Result has 972 places, 1397 transitions, 31205 flow [2021-12-17 23:28:16,938 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31090, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31205, PETRI_PLACES=972, PETRI_TRANSITIONS=1397} [2021-12-17 23:28:16,938 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 884 predicate places. [2021-12-17 23:28:16,938 INFO L470 AbstractCegarLoop]: Abstraction has has 972 places, 1397 transitions, 31205 flow [2021-12-17 23:28:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:16,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:16,939 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] [2021-12-17 23:28:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-12-17 23:28:16,939 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1769669354, now seen corresponding path program 218 times [2021-12-17 23:28:16,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382195860] [2021-12-17 23:28:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:16,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:17,225 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 23:28:17,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382195860] [2021-12-17 23:28:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382195860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:17,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:17,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:28:17,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898453535] [2021-12-17 23:28:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:17,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:28:17,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:28:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:28:17,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:17,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 1397 transitions, 31205 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:17,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:17,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:17,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:19,860 INFO L129 PetriNetUnfolder]: 854/2768 cut-off events. [2021-12-17 23:28:19,860 INFO L130 PetriNetUnfolder]: For 156349/156349 co-relation queries the response was YES. [2021-12-17 23:28:19,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31987 conditions, 2768 events. 854/2768 cut-off events. For 156349/156349 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23660 event pairs, 42 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 31631. Up to 2104 conditions per place. [2021-12-17 23:28:19,935 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1255 selfloop transitions, 105 changer transitions 25/1424 dead transitions. [2021-12-17 23:28:19,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 1424 transitions, 34153 flow [2021-12-17 23:28:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:28:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:28:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1648 transitions. [2021-12-17 23:28:19,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5655456417295813 [2021-12-17 23:28:19,936 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1648 transitions. [2021-12-17 23:28:19,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1648 transitions. [2021-12-17 23:28:19,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:19,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1648 transitions. [2021-12-17 23:28:19,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.16129032258065) internal successors, (1648), 31 states have internal predecessors, (1648), 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 23:28:19,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:19,939 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:28:19,939 INFO L186 Difference]: Start difference. First operand has 972 places, 1397 transitions, 31205 flow. Second operand 31 states and 1648 transitions. [2021-12-17 23:28:19,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 1424 transitions, 34153 flow [2021-12-17 23:28:22,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 953 places, 1424 transitions, 33832 flow, removed 12 selfloop flow, removed 33 redundant places. [2021-12-17 23:28:22,091 INFO L242 Difference]: Finished difference. Result has 957 places, 1385 transitions, 30980 flow [2021-12-17 23:28:22,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30888, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30980, PETRI_PLACES=957, PETRI_TRANSITIONS=1385} [2021-12-17 23:28:22,092 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 869 predicate places. [2021-12-17 23:28:22,092 INFO L470 AbstractCegarLoop]: Abstraction has has 957 places, 1385 transitions, 30980 flow [2021-12-17 23:28:22,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:22,092 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:22,092 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] [2021-12-17 23:28:22,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-12-17 23:28:22,092 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash -971870534, now seen corresponding path program 219 times [2021-12-17 23:28:22,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:22,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594481160] [2021-12-17 23:28:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:22,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:22,360 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 23:28:22,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:22,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594481160] [2021-12-17 23:28:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594481160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:22,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:22,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:28:22,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789109239] [2021-12-17 23:28:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:22,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:28:22,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:28:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:28:22,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:22,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 957 places, 1385 transitions, 30980 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:22,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:22,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:22,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:25,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:28:27,053 INFO L129 PetriNetUnfolder]: 860/2808 cut-off events. [2021-12-17 23:28:27,054 INFO L130 PetriNetUnfolder]: For 161026/161026 co-relation queries the response was YES. [2021-12-17 23:28:27,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32570 conditions, 2808 events. 860/2808 cut-off events. For 161026/161026 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24183 event pairs, 43 based on Foata normal form. 1/2806 useless extension candidates. Maximal degree in co-relation 32219. Up to 1896 conditions per place. [2021-12-17 23:28:27,294 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1105 selfloop transitions, 248 changer transitions 55/1447 dead transitions. [2021-12-17 23:28:27,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 1447 transitions, 35483 flow [2021-12-17 23:28:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 23:28:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-17 23:28:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2365 transitions. [2021-12-17 23:28:27,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5591016548463357 [2021-12-17 23:28:27,296 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2365 transitions. [2021-12-17 23:28:27,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2365 transitions. [2021-12-17 23:28:27,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:27,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2365 transitions. [2021-12-17 23:28:27,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 52.55555555555556) internal successors, (2365), 45 states have internal predecessors, (2365), 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 23:28:27,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:28:27,300 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:28:27,301 INFO L186 Difference]: Start difference. First operand has 957 places, 1385 transitions, 30980 flow. Second operand 45 states and 2365 transitions. [2021-12-17 23:28:27,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 1447 transitions, 35483 flow [2021-12-17 23:28:29,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 952 places, 1447 transitions, 35063 flow, removed 53 selfloop flow, removed 32 redundant places. [2021-12-17 23:28:29,405 INFO L242 Difference]: Finished difference. Result has 969 places, 1374 transitions, 31065 flow [2021-12-17 23:28:29,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30592, PETRI_DIFFERENCE_MINUEND_PLACES=908, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=31065, PETRI_PLACES=969, PETRI_TRANSITIONS=1374} [2021-12-17 23:28:29,406 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 881 predicate places. [2021-12-17 23:28:29,406 INFO L470 AbstractCegarLoop]: Abstraction has has 969 places, 1374 transitions, 31065 flow [2021-12-17 23:28:29,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:29,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:29,406 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] [2021-12-17 23:28:29,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-12-17 23:28:29,406 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -859709800, now seen corresponding path program 220 times [2021-12-17 23:28:29,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:29,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370055968] [2021-12-17 23:28:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:29,679 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 23:28:29,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370055968] [2021-12-17 23:28:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370055968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:29,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:29,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:28:29,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228814982] [2021-12-17 23:28:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:29,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:28:29,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:28:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:28:29,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:29,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1374 transitions, 31065 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:29,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:29,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:29,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:32,464 INFO L129 PetriNetUnfolder]: 827/2738 cut-off events. [2021-12-17 23:28:32,464 INFO L130 PetriNetUnfolder]: For 161026/161026 co-relation queries the response was YES. [2021-12-17 23:28:32,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31876 conditions, 2738 events. 827/2738 cut-off events. For 161026/161026 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 23650 event pairs, 41 based on Foata normal form. 1/2735 useless extension candidates. Maximal degree in co-relation 31517. Up to 2061 conditions per place. [2021-12-17 23:28:32,552 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1232 selfloop transitions, 119 changer transitions 17/1407 dead transitions. [2021-12-17 23:28:32,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 997 places, 1407 transitions, 34299 flow [2021-12-17 23:28:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:28:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:28:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2056 transitions. [2021-12-17 23:28:32,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5608292416803055 [2021-12-17 23:28:32,553 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2056 transitions. [2021-12-17 23:28:32,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2056 transitions. [2021-12-17 23:28:32,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:32,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2056 transitions. [2021-12-17 23:28:32,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.717948717948715) internal successors, (2056), 39 states have internal predecessors, (2056), 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 23:28:32,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:28:32,557 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:28:32,557 INFO L186 Difference]: Start difference. First operand has 969 places, 1374 transitions, 31065 flow. Second operand 39 states and 2056 transitions. [2021-12-17 23:28:32,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 997 places, 1407 transitions, 34299 flow [2021-12-17 23:28:34,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 1407 transitions, 33738 flow, removed 163 selfloop flow, removed 33 redundant places. [2021-12-17 23:28:34,691 INFO L242 Difference]: Finished difference. Result has 972 places, 1375 transitions, 30842 flow [2021-12-17 23:28:34,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30524, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=30842, PETRI_PLACES=972, PETRI_TRANSITIONS=1375} [2021-12-17 23:28:34,692 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 884 predicate places. [2021-12-17 23:28:34,692 INFO L470 AbstractCegarLoop]: Abstraction has has 972 places, 1375 transitions, 30842 flow [2021-12-17 23:28:34,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:28:34,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:34,692 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] [2021-12-17 23:28:34,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-12-17 23:28:34,693 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 302354864, now seen corresponding path program 221 times [2021-12-17 23:28:34,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:34,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573660669] [2021-12-17 23:28:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:34,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:34,966 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 23:28:34,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573660669] [2021-12-17 23:28:34,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573660669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:34,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:34,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:28:34,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307268027] [2021-12-17 23:28:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:34,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:28:34,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:28:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:28:34,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:34,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 1375 transitions, 30842 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:34,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:34,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:34,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:37,589 INFO L129 PetriNetUnfolder]: 824/2741 cut-off events. [2021-12-17 23:28:37,589 INFO L130 PetriNetUnfolder]: For 156246/156246 co-relation queries the response was YES. [2021-12-17 23:28:37,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31701 conditions, 2741 events. 824/2741 cut-off events. For 156246/156246 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23675 event pairs, 43 based on Foata normal form. 1/2739 useless extension candidates. Maximal degree in co-relation 31345. Up to 2066 conditions per place. [2021-12-17 23:28:37,674 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1235 selfloop transitions, 117 changer transitions 14/1405 dead transitions. [2021-12-17 23:28:37,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 1405 transitions, 34307 flow [2021-12-17 23:28:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:28:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:28:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1907 transitions. [2021-12-17 23:28:37,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635342789598109 [2021-12-17 23:28:37,676 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1907 transitions. [2021-12-17 23:28:37,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1907 transitions. [2021-12-17 23:28:37,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:37,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1907 transitions. [2021-12-17 23:28:37,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.97222222222222) internal successors, (1907), 36 states have internal predecessors, (1907), 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 23:28:37,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:28:37,679 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:28:37,679 INFO L186 Difference]: Start difference. First operand has 972 places, 1375 transitions, 30842 flow. Second operand 36 states and 1907 transitions. [2021-12-17 23:28:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 1405 transitions, 34307 flow [2021-12-17 23:28:39,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 1405 transitions, 33964 flow, removed 42 selfloop flow, removed 38 redundant places. [2021-12-17 23:28:39,593 INFO L242 Difference]: Finished difference. Result has 970 places, 1376 transitions, 31115 flow [2021-12-17 23:28:39,594 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30538, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31115, PETRI_PLACES=970, PETRI_TRANSITIONS=1376} [2021-12-17 23:28:39,594 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 882 predicate places. [2021-12-17 23:28:39,594 INFO L470 AbstractCegarLoop]: Abstraction has has 970 places, 1376 transitions, 31115 flow [2021-12-17 23:28:39,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:39,594 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:39,594 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] [2021-12-17 23:28:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-12-17 23:28:39,595 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash -232926998, now seen corresponding path program 222 times [2021-12-17 23:28:39,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747167413] [2021-12-17 23:28:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:39,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:39,864 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 23:28:39,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:39,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747167413] [2021-12-17 23:28:39,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747167413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:39,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:39,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:28:39,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016662914] [2021-12-17 23:28:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:39,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:28:39,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:28:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:28:39,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:39,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 970 places, 1376 transitions, 31115 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:39,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:39,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:39,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:43,224 INFO L129 PetriNetUnfolder]: 832/2769 cut-off events. [2021-12-17 23:28:43,224 INFO L130 PetriNetUnfolder]: For 160722/160722 co-relation queries the response was YES. [2021-12-17 23:28:43,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32198 conditions, 2769 events. 832/2769 cut-off events. For 160722/160722 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 23992 event pairs, 41 based on Foata normal form. 1/2766 useless extension candidates. Maximal degree in co-relation 31843. Up to 2031 conditions per place. [2021-12-17 23:28:43,310 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1209 selfloop transitions, 139 changer transitions 33/1420 dead transitions. [2021-12-17 23:28:43,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 1420 transitions, 35099 flow [2021-12-17 23:28:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:28:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:28:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2152 transitions. [2021-12-17 23:28:43,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583809029579657 [2021-12-17 23:28:43,312 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2152 transitions. [2021-12-17 23:28:43,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2152 transitions. [2021-12-17 23:28:43,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:43,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2152 transitions. [2021-12-17 23:28:43,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.48780487804878) internal successors, (2152), 41 states have internal predecessors, (2152), 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 23:28:43,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:28:43,315 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:28:43,315 INFO L186 Difference]: Start difference. First operand has 970 places, 1376 transitions, 31115 flow. Second operand 41 states and 2152 transitions. [2021-12-17 23:28:43,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 1420 transitions, 35099 flow [2021-12-17 23:28:45,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 976 places, 1420 transitions, 34625 flow, removed 149 selfloop flow, removed 29 redundant places. [2021-12-17 23:28:45,485 INFO L242 Difference]: Finished difference. Result has 987 places, 1374 transitions, 31076 flow [2021-12-17 23:28:45,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30661, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31076, PETRI_PLACES=987, PETRI_TRANSITIONS=1374} [2021-12-17 23:28:45,486 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 899 predicate places. [2021-12-17 23:28:45,486 INFO L470 AbstractCegarLoop]: Abstraction has has 987 places, 1374 transitions, 31076 flow [2021-12-17 23:28:45,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:45,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:45,486 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] [2021-12-17 23:28:45,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-12-17 23:28:45,486 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1968548382, now seen corresponding path program 223 times [2021-12-17 23:28:45,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:45,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715944164] [2021-12-17 23:28:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:45,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:45,755 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 23:28:45,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:45,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715944164] [2021-12-17 23:28:45,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715944164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:45,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:45,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:28:45,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682101799] [2021-12-17 23:28:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:28:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:28:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:28:45,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:45,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 1374 transitions, 31076 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:45,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:45,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:45,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:48,474 INFO L129 PetriNetUnfolder]: 820/2762 cut-off events. [2021-12-17 23:28:48,474 INFO L130 PetriNetUnfolder]: For 163418/163418 co-relation queries the response was YES. [2021-12-17 23:28:48,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32025 conditions, 2762 events. 820/2762 cut-off events. For 163418/163418 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23944 event pairs, 44 based on Foata normal form. 1/2760 useless extension candidates. Maximal degree in co-relation 31664. Up to 2053 conditions per place. [2021-12-17 23:28:48,555 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1222 selfloop transitions, 130 changer transitions 17/1408 dead transitions. [2021-12-17 23:28:48,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 1408 transitions, 34529 flow [2021-12-17 23:28:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:28:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:28:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2011 transitions. [2021-12-17 23:28:48,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.562989921612542 [2021-12-17 23:28:48,556 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2011 transitions. [2021-12-17 23:28:48,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2011 transitions. [2021-12-17 23:28:48,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2011 transitions. [2021-12-17 23:28:48,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.921052631578945) internal successors, (2011), 38 states have internal predecessors, (2011), 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 23:28:48,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:28:48,560 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:28:48,560 INFO L186 Difference]: Start difference. First operand has 987 places, 1374 transitions, 31076 flow. Second operand 38 states and 2011 transitions. [2021-12-17 23:28:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 1408 transitions, 34529 flow [2021-12-17 23:28:50,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 980 places, 1408 transitions, 33967 flow, removed 152 selfloop flow, removed 34 redundant places. [2021-12-17 23:28:50,752 INFO L242 Difference]: Finished difference. Result has 988 places, 1376 transitions, 31091 flow [2021-12-17 23:28:50,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30536, PETRI_DIFFERENCE_MINUEND_PLACES=943, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31091, PETRI_PLACES=988, PETRI_TRANSITIONS=1376} [2021-12-17 23:28:50,753 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 900 predicate places. [2021-12-17 23:28:50,753 INFO L470 AbstractCegarLoop]: Abstraction has has 988 places, 1376 transitions, 31091 flow [2021-12-17 23:28:50,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:28:50,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:50,753 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] [2021-12-17 23:28:50,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-12-17 23:28:50,753 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1357152800, now seen corresponding path program 224 times [2021-12-17 23:28:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:50,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220382304] [2021-12-17 23:28:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:50,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:51,053 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 23:28:51,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220382304] [2021-12-17 23:28:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220382304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:51,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:28:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006547713] [2021-12-17 23:28:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:51,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:28:51,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:28:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:28:51,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:51,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 1376 transitions, 31091 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:51,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:51,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:51,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:28:54,444 INFO L129 PetriNetUnfolder]: 824/2759 cut-off events. [2021-12-17 23:28:54,444 INFO L130 PetriNetUnfolder]: For 158272/158272 co-relation queries the response was YES. [2021-12-17 23:28:54,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32154 conditions, 2759 events. 824/2759 cut-off events. For 158272/158272 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23993 event pairs, 40 based on Foata normal form. 1/2756 useless extension candidates. Maximal degree in co-relation 31793. Up to 1706 conditions per place. [2021-12-17 23:28:54,520 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1027 selfloop transitions, 354 changer transitions 32/1452 dead transitions. [2021-12-17 23:28:54,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1030 places, 1452 transitions, 36146 flow [2021-12-17 23:28:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 23:28:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-17 23:28:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2575 transitions. [2021-12-17 23:28:54,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5590534085974815 [2021-12-17 23:28:54,522 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2575 transitions. [2021-12-17 23:28:54,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2575 transitions. [2021-12-17 23:28:54,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:28:54,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2575 transitions. [2021-12-17 23:28:54,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 52.55102040816327) internal successors, (2575), 49 states have internal predecessors, (2575), 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 23:28:54,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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 23:28:54,526 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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 23:28:54,526 INFO L186 Difference]: Start difference. First operand has 988 places, 1376 transitions, 31091 flow. Second operand 49 states and 2575 transitions. [2021-12-17 23:28:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1030 places, 1452 transitions, 36146 flow [2021-12-17 23:28:56,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 996 places, 1452 transitions, 35639 flow, removed 142 selfloop flow, removed 34 redundant places. [2021-12-17 23:28:56,625 INFO L242 Difference]: Finished difference. Result has 1003 places, 1390 transitions, 31935 flow [2021-12-17 23:28:56,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=30592, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=31935, PETRI_PLACES=1003, PETRI_TRANSITIONS=1390} [2021-12-17 23:28:56,625 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 915 predicate places. [2021-12-17 23:28:56,625 INFO L470 AbstractCegarLoop]: Abstraction has has 1003 places, 1390 transitions, 31935 flow [2021-12-17 23:28:56,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:56,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:28:56,626 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] [2021-12-17 23:28:56,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-12-17 23:28:56,626 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:28:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:28:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1940988118, now seen corresponding path program 225 times [2021-12-17 23:28:56,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:28:56,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329530762] [2021-12-17 23:28:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:28:56,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:28:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:28:56,950 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 23:28:56,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:28:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329530762] [2021-12-17 23:28:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329530762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:28:56,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:28:56,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:28:56,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448291047] [2021-12-17 23:28:56,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:28:56,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:28:56,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:28:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:28:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:28:56,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:28:56,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1003 places, 1390 transitions, 31935 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:28:56,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:28:56,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:28:56,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:00,748 INFO L129 PetriNetUnfolder]: 819/2712 cut-off events. [2021-12-17 23:29:00,748 INFO L130 PetriNetUnfolder]: For 160350/160350 co-relation queries the response was YES. [2021-12-17 23:29:00,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32076 conditions, 2712 events. 819/2712 cut-off events. For 160350/160350 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23328 event pairs, 41 based on Foata normal form. 1/2710 useless extension candidates. Maximal degree in co-relation 31714. Up to 2041 conditions per place. [2021-12-17 23:29:00,983 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1258 selfloop transitions, 116 changer transitions 16/1429 dead transitions. [2021-12-17 23:29:00,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 1429 transitions, 35510 flow [2021-12-17 23:29:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:29:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:29:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1990 transitions. [2021-12-17 23:29:00,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5571108622620381 [2021-12-17 23:29:00,985 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1990 transitions. [2021-12-17 23:29:00,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1990 transitions. [2021-12-17 23:29:00,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:00,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1990 transitions. [2021-12-17 23:29:00,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.36842105263158) internal successors, (1990), 38 states have internal predecessors, (1990), 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 23:29:00,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:00,988 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:00,988 INFO L186 Difference]: Start difference. First operand has 1003 places, 1390 transitions, 31935 flow. Second operand 38 states and 1990 transitions. [2021-12-17 23:29:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 1429 transitions, 35510 flow [2021-12-17 23:29:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 1429 transitions, 34640 flow, removed 205 selfloop flow, removed 42 redundant places. [2021-12-17 23:29:03,192 INFO L242 Difference]: Finished difference. Result has 1003 places, 1398 transitions, 31634 flow [2021-12-17 23:29:03,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31091, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31634, PETRI_PLACES=1003, PETRI_TRANSITIONS=1398} [2021-12-17 23:29:03,193 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 915 predicate places. [2021-12-17 23:29:03,193 INFO L470 AbstractCegarLoop]: Abstraction has has 1003 places, 1398 transitions, 31634 flow [2021-12-17 23:29:03,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:03,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:03,193 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] [2021-12-17 23:29:03,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-12-17 23:29:03,194 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1008194528, now seen corresponding path program 226 times [2021-12-17 23:29:03,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:03,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086781640] [2021-12-17 23:29:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:03,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:03,481 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 23:29:03,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086781640] [2021-12-17 23:29:03,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086781640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:03,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:03,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:29:03,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327265538] [2021-12-17 23:29:03,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:03,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:29:03,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:29:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:29:03,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:03,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1003 places, 1398 transitions, 31634 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:03,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:03,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:03,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:06,656 INFO L129 PetriNetUnfolder]: 814/2705 cut-off events. [2021-12-17 23:29:06,656 INFO L130 PetriNetUnfolder]: For 138798/138798 co-relation queries the response was YES. [2021-12-17 23:29:06,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31060 conditions, 2705 events. 814/2705 cut-off events. For 138798/138798 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23241 event pairs, 39 based on Foata normal form. 1/2703 useless extension candidates. Maximal degree in co-relation 30693. Up to 2033 conditions per place. [2021-12-17 23:29:06,745 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1257 selfloop transitions, 78 changer transitions 47/1421 dead transitions. [2021-12-17 23:29:06,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 1421 transitions, 34634 flow [2021-12-17 23:29:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:29:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:29:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1834 transitions. [2021-12-17 23:29:06,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2021-12-17 23:29:06,747 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1834 transitions. [2021-12-17 23:29:06,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1834 transitions. [2021-12-17 23:29:06,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:06,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1834 transitions. [2021-12-17 23:29:06,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.4) internal successors, (1834), 35 states have internal predecessors, (1834), 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 23:29:06,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:29:06,750 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:29:06,750 INFO L186 Difference]: Start difference. First operand has 1003 places, 1398 transitions, 31634 flow. Second operand 35 states and 1834 transitions. [2021-12-17 23:29:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 1421 transitions, 34634 flow [2021-12-17 23:29:08,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 1421 transitions, 34223 flow, removed 122 selfloop flow, removed 31 redundant places. [2021-12-17 23:29:08,888 INFO L242 Difference]: Finished difference. Result has 1005 places, 1360 transitions, 30436 flow [2021-12-17 23:29:08,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=31229, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30436, PETRI_PLACES=1005, PETRI_TRANSITIONS=1360} [2021-12-17 23:29:08,888 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 917 predicate places. [2021-12-17 23:29:08,888 INFO L470 AbstractCegarLoop]: Abstraction has has 1005 places, 1360 transitions, 30436 flow [2021-12-17 23:29:08,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:08,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:08,889 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] [2021-12-17 23:29:08,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-12-17 23:29:08,889 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1094757008, now seen corresponding path program 227 times [2021-12-17 23:29:08,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:08,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273499952] [2021-12-17 23:29:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:08,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:09,227 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 23:29:09,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273499952] [2021-12-17 23:29:09,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273499952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:09,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:09,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:29:09,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115048919] [2021-12-17 23:29:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:09,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:29:09,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:29:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:29:09,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:09,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 1360 transitions, 30436 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:09,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:09,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:09,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:12,281 INFO L129 PetriNetUnfolder]: 802/2654 cut-off events. [2021-12-17 23:29:12,281 INFO L130 PetriNetUnfolder]: For 135987/135987 co-relation queries the response was YES. [2021-12-17 23:29:12,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 2654 events. 802/2654 cut-off events. For 135987/135987 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22676 event pairs, 43 based on Foata normal form. 1/2650 useless extension candidates. Maximal degree in co-relation 29961. Up to 1845 conditions per place. [2021-12-17 23:29:12,365 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1091 selfloop transitions, 164 changer transitions 93/1387 dead transitions. [2021-12-17 23:29:12,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 1387 transitions, 33392 flow [2021-12-17 23:29:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 23:29:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-17 23:29:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2101 transitions. [2021-12-17 23:29:12,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587765957446809 [2021-12-17 23:29:12,366 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2101 transitions. [2021-12-17 23:29:12,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2101 transitions. [2021-12-17 23:29:12,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:12,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2101 transitions. [2021-12-17 23:29:12,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.525) internal successors, (2101), 40 states have internal predecessors, (2101), 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 23:29:12,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:29:12,370 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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 23:29:12,370 INFO L186 Difference]: Start difference. First operand has 1005 places, 1360 transitions, 30436 flow. Second operand 40 states and 2101 transitions. [2021-12-17 23:29:12,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 1387 transitions, 33392 flow [2021-12-17 23:29:14,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 1387 transitions, 32941 flow, removed 94 selfloop flow, removed 42 redundant places. [2021-12-17 23:29:14,350 INFO L242 Difference]: Finished difference. Result has 980 places, 1278 transitions, 27865 flow [2021-12-17 23:29:14,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=29999, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=27865, PETRI_PLACES=980, PETRI_TRANSITIONS=1278} [2021-12-17 23:29:14,351 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 892 predicate places. [2021-12-17 23:29:14,351 INFO L470 AbstractCegarLoop]: Abstraction has has 980 places, 1278 transitions, 27865 flow [2021-12-17 23:29:14,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:14,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:14,351 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] [2021-12-17 23:29:14,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-12-17 23:29:14,351 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 637919624, now seen corresponding path program 228 times [2021-12-17 23:29:14,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:14,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812025787] [2021-12-17 23:29:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:14,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:14,660 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 23:29:14,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:14,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812025787] [2021-12-17 23:29:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812025787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:14,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:14,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:14,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509270125] [2021-12-17 23:29:14,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:14,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:14,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:14,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:14,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1278 transitions, 27865 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:14,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:14,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:14,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:17,295 INFO L129 PetriNetUnfolder]: 784/2585 cut-off events. [2021-12-17 23:29:17,295 INFO L130 PetriNetUnfolder]: For 134346/134346 co-relation queries the response was YES. [2021-12-17 23:29:17,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29054 conditions, 2585 events. 784/2585 cut-off events. For 134346/134346 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21803 event pairs, 39 based on Foata normal form. 1/2583 useless extension candidates. Maximal degree in co-relation 28700. Up to 1891 conditions per place. [2021-12-17 23:29:17,376 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1144 selfloop transitions, 123 changer transitions 16/1322 dead transitions. [2021-12-17 23:29:17,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 998 places, 1322 transitions, 31331 flow [2021-12-17 23:29:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:29:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:29:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1946 transitions. [2021-12-17 23:29:17,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595169637722829 [2021-12-17 23:29:17,378 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1946 transitions. [2021-12-17 23:29:17,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1946 transitions. [2021-12-17 23:29:17,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:17,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1946 transitions. [2021-12-17 23:29:17,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.5945945945946) internal successors, (1946), 37 states have internal predecessors, (1946), 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 23:29:17,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:29:17,381 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:29:17,381 INFO L186 Difference]: Start difference. First operand has 980 places, 1278 transitions, 27865 flow. Second operand 37 states and 1946 transitions. [2021-12-17 23:29:17,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 998 places, 1322 transitions, 31331 flow [2021-12-17 23:29:19,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 949 places, 1322 transitions, 30533 flow, removed 122 selfloop flow, removed 49 redundant places. [2021-12-17 23:29:19,279 INFO L242 Difference]: Finished difference. Result has 961 places, 1287 transitions, 27710 flow [2021-12-17 23:29:19,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=27115, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=27710, PETRI_PLACES=961, PETRI_TRANSITIONS=1287} [2021-12-17 23:29:19,279 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 873 predicate places. [2021-12-17 23:29:19,280 INFO L470 AbstractCegarLoop]: Abstraction has has 961 places, 1287 transitions, 27710 flow [2021-12-17 23:29:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:19,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:19,280 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] [2021-12-17 23:29:19,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-12-17 23:29:19,280 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1270925556, now seen corresponding path program 229 times [2021-12-17 23:29:19,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:19,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975637145] [2021-12-17 23:29:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:19,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:19,561 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 23:29:19,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975637145] [2021-12-17 23:29:19,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975637145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:19,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:19,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:19,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469300854] [2021-12-17 23:29:19,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:19,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:19,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:19,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:19,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 961 places, 1287 transitions, 27710 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:19,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:19,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:19,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:22,105 INFO L129 PetriNetUnfolder]: 782/2580 cut-off events. [2021-12-17 23:29:22,105 INFO L130 PetriNetUnfolder]: For 131704/131704 co-relation queries the response was YES. [2021-12-17 23:29:22,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28751 conditions, 2580 events. 782/2580 cut-off events. For 131704/131704 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21755 event pairs, 40 based on Foata normal form. 1/2577 useless extension candidates. Maximal degree in co-relation 28400. Up to 1897 conditions per place. [2021-12-17 23:29:22,177 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1125 selfloop transitions, 123 changer transitions 31/1318 dead transitions. [2021-12-17 23:29:22,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 992 places, 1318 transitions, 30981 flow [2021-12-17 23:29:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:29:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:29:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2010 transitions. [2021-12-17 23:29:22,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5627099664053752 [2021-12-17 23:29:22,178 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2010 transitions. [2021-12-17 23:29:22,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2010 transitions. [2021-12-17 23:29:22,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:22,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2010 transitions. [2021-12-17 23:29:22,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.89473684210526) internal successors, (2010), 38 states have internal predecessors, (2010), 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 23:29:22,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:22,181 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:22,181 INFO L186 Difference]: Start difference. First operand has 961 places, 1287 transitions, 27710 flow. Second operand 38 states and 2010 transitions. [2021-12-17 23:29:22,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 992 places, 1318 transitions, 30981 flow [2021-12-17 23:29:24,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 1318 transitions, 30525 flow, removed 129 selfloop flow, removed 29 redundant places. [2021-12-17 23:29:24,027 INFO L242 Difference]: Finished difference. Result has 970 places, 1272 transitions, 27615 flow [2021-12-17 23:29:24,027 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=27266, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=27615, PETRI_PLACES=970, PETRI_TRANSITIONS=1272} [2021-12-17 23:29:24,027 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 882 predicate places. [2021-12-17 23:29:24,027 INFO L470 AbstractCegarLoop]: Abstraction has has 970 places, 1272 transitions, 27615 flow [2021-12-17 23:29:24,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:24,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:24,028 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] [2021-12-17 23:29:24,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-12-17 23:29:24,028 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -179555498, now seen corresponding path program 230 times [2021-12-17 23:29:24,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:24,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813932574] [2021-12-17 23:29:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:24,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:24,300 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 23:29:24,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813932574] [2021-12-17 23:29:24,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813932574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:24,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:24,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:29:24,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915943262] [2021-12-17 23:29:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:24,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:29:24,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:29:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:29:24,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:24,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 970 places, 1272 transitions, 27615 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:24,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:24,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:24,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:26,636 INFO L129 PetriNetUnfolder]: 770/2540 cut-off events. [2021-12-17 23:29:26,636 INFO L130 PetriNetUnfolder]: For 126487/126487 co-relation queries the response was YES. [2021-12-17 23:29:26,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28345 conditions, 2540 events. 770/2540 cut-off events. For 126487/126487 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21309 event pairs, 43 based on Foata normal form. 1/2538 useless extension candidates. Maximal degree in co-relation 27993. Up to 1888 conditions per place. [2021-12-17 23:29:26,714 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1121 selfloop transitions, 105 changer transitions 29/1294 dead transitions. [2021-12-17 23:29:26,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 993 places, 1294 transitions, 30296 flow [2021-12-17 23:29:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:29:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:29:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1804 transitions. [2021-12-17 23:29:26,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644555694618273 [2021-12-17 23:29:26,716 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1804 transitions. [2021-12-17 23:29:26,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1804 transitions. [2021-12-17 23:29:26,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:26,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1804 transitions. [2021-12-17 23:29:26,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.05882352941177) internal successors, (1804), 34 states have internal predecessors, (1804), 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 23:29:26,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:29:26,719 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:29:26,719 INFO L186 Difference]: Start difference. First operand has 970 places, 1272 transitions, 27615 flow. Second operand 34 states and 1804 transitions. [2021-12-17 23:29:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 993 places, 1294 transitions, 30296 flow [2021-12-17 23:29:28,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 1294 transitions, 29627 flow, removed 154 selfloop flow, removed 43 redundant places. [2021-12-17 23:29:28,639 INFO L242 Difference]: Finished difference. Result has 954 places, 1250 transitions, 26962 flow [2021-12-17 23:29:28,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26952, PETRI_DIFFERENCE_MINUEND_PLACES=917, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26962, PETRI_PLACES=954, PETRI_TRANSITIONS=1250} [2021-12-17 23:29:28,639 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 866 predicate places. [2021-12-17 23:29:28,639 INFO L470 AbstractCegarLoop]: Abstraction has has 954 places, 1250 transitions, 26962 flow [2021-12-17 23:29:28,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:28,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:28,640 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] [2021-12-17 23:29:28,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-12-17 23:29:28,640 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash -119417330, now seen corresponding path program 231 times [2021-12-17 23:29:28,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:28,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130796316] [2021-12-17 23:29:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:28,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:29,003 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 23:29:29,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:29,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130796316] [2021-12-17 23:29:29,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130796316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:29,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:29,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:29,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594424549] [2021-12-17 23:29:29,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:29,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:29,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:29,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:29,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 1250 transitions, 26962 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:29,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:29,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:29,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:31,368 INFO L129 PetriNetUnfolder]: 763/2495 cut-off events. [2021-12-17 23:29:31,368 INFO L130 PetriNetUnfolder]: For 127715/127715 co-relation queries the response was YES. [2021-12-17 23:29:31,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27934 conditions, 2495 events. 763/2495 cut-off events. For 127715/127715 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20803 event pairs, 41 based on Foata normal form. 1/2492 useless extension candidates. Maximal degree in co-relation 27586. Up to 1882 conditions per place. [2021-12-17 23:29:31,441 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1115 selfloop transitions, 97 changer transitions 22/1273 dead transitions. [2021-12-17 23:29:31,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 969 places, 1273 transitions, 29590 flow [2021-12-17 23:29:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:29:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:29:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1747 transitions. [2021-12-17 23:29:31,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631850419084462 [2021-12-17 23:29:31,443 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1747 transitions. [2021-12-17 23:29:31,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1747 transitions. [2021-12-17 23:29:31,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:31,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1747 transitions. [2021-12-17 23:29:31,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.93939393939394) internal successors, (1747), 33 states have internal predecessors, (1747), 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 23:29:31,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:29:31,446 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:29:31,446 INFO L186 Difference]: Start difference. First operand has 954 places, 1250 transitions, 26962 flow. Second operand 33 states and 1747 transitions. [2021-12-17 23:29:31,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 969 places, 1273 transitions, 29590 flow [2021-12-17 23:29:33,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 928 places, 1273 transitions, 29228 flow, removed 12 selfloop flow, removed 41 redundant places. [2021-12-17 23:29:33,372 INFO L242 Difference]: Finished difference. Result has 932 places, 1237 transitions, 26699 flow [2021-12-17 23:29:33,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26606, PETRI_DIFFERENCE_MINUEND_PLACES=896, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26699, PETRI_PLACES=932, PETRI_TRANSITIONS=1237} [2021-12-17 23:29:33,373 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 844 predicate places. [2021-12-17 23:29:33,373 INFO L470 AbstractCegarLoop]: Abstraction has has 932 places, 1237 transitions, 26699 flow [2021-12-17 23:29:33,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:33,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:33,373 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] [2021-12-17 23:29:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-12-17 23:29:33,374 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1048558806, now seen corresponding path program 232 times [2021-12-17 23:29:33,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:33,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421360657] [2021-12-17 23:29:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:33,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:33,665 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 23:29:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421360657] [2021-12-17 23:29:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421360657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:33,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:29:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108884921] [2021-12-17 23:29:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:33,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:29:33,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:29:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:29:33,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:33,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 1237 transitions, 26699 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:33,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:33,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:33,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:36,315 INFO L129 PetriNetUnfolder]: 761/2488 cut-off events. [2021-12-17 23:29:36,315 INFO L130 PetriNetUnfolder]: For 126054/126054 co-relation queries the response was YES. [2021-12-17 23:29:36,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27850 conditions, 2488 events. 761/2488 cut-off events. For 126054/126054 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20689 event pairs, 41 based on Foata normal form. 1/2485 useless extension candidates. Maximal degree in co-relation 27507. Up to 1818 conditions per place. [2021-12-17 23:29:36,395 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1086 selfloop transitions, 117 changer transitions 28/1270 dead transitions. [2021-12-17 23:29:36,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 1270 transitions, 29711 flow [2021-12-17 23:29:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:29:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:29:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1894 transitions. [2021-12-17 23:29:36,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5596926713947991 [2021-12-17 23:29:36,396 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1894 transitions. [2021-12-17 23:29:36,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1894 transitions. [2021-12-17 23:29:36,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:36,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1894 transitions. [2021-12-17 23:29:36,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.611111111111114) internal successors, (1894), 36 states have internal predecessors, (1894), 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 23:29:36,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:29:36,399 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:29:36,400 INFO L186 Difference]: Start difference. First operand has 932 places, 1237 transitions, 26699 flow. Second operand 36 states and 1894 transitions. [2021-12-17 23:29:36,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 1270 transitions, 29711 flow [2021-12-17 23:29:38,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 1270 transitions, 29364 flow, removed 23 selfloop flow, removed 32 redundant places. [2021-12-17 23:29:38,158 INFO L242 Difference]: Finished difference. Result has 924 places, 1223 transitions, 26468 flow [2021-12-17 23:29:38,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26368, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26468, PETRI_PLACES=924, PETRI_TRANSITIONS=1223} [2021-12-17 23:29:38,159 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 836 predicate places. [2021-12-17 23:29:38,159 INFO L470 AbstractCegarLoop]: Abstraction has has 924 places, 1223 transitions, 26468 flow [2021-12-17 23:29:38,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:38,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:38,159 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] [2021-12-17 23:29:38,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-12-17 23:29:38,159 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash -498309356, now seen corresponding path program 233 times [2021-12-17 23:29:38,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154379921] [2021-12-17 23:29:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:38,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:38,450 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 23:29:38,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:38,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154379921] [2021-12-17 23:29:38,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154379921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:38,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:38,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:38,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32023002] [2021-12-17 23:29:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:38,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:38,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:38,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:38,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 924 places, 1223 transitions, 26468 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:38,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:38,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:38,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:41,200 INFO L129 PetriNetUnfolder]: 758/2471 cut-off events. [2021-12-17 23:29:41,200 INFO L130 PetriNetUnfolder]: For 127659/127659 co-relation queries the response was YES. [2021-12-17 23:29:41,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27904 conditions, 2471 events. 758/2471 cut-off events. For 127659/127659 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20464 event pairs, 41 based on Foata normal form. 1/2468 useless extension candidates. Maximal degree in co-relation 27561. Up to 1573 conditions per place. [2021-12-17 23:29:41,256 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 857 selfloop transitions, 348 changer transitions 26/1270 dead transitions. [2021-12-17 23:29:41,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1270 transitions, 30025 flow [2021-12-17 23:29:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 23:29:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-17 23:29:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2370 transitions. [2021-12-17 23:29:41,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2021-12-17 23:29:41,258 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2370 transitions. [2021-12-17 23:29:41,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2370 transitions. [2021-12-17 23:29:41,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:41,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2370 transitions. [2021-12-17 23:29:41,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 52.666666666666664) internal successors, (2370), 45 states have internal predecessors, (2370), 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 23:29:41,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:29:41,262 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:29:41,262 INFO L186 Difference]: Start difference. First operand has 924 places, 1223 transitions, 26468 flow. Second operand 45 states and 2370 transitions. [2021-12-17 23:29:41,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1270 transitions, 30025 flow [2021-12-17 23:29:42,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 1270 transitions, 29545 flow, removed 50 selfloop flow, removed 46 redundant places. [2021-12-17 23:29:42,833 INFO L242 Difference]: Finished difference. Result has 914 places, 1224 transitions, 27118 flow [2021-12-17 23:29:42,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26038, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=27118, PETRI_PLACES=914, PETRI_TRANSITIONS=1224} [2021-12-17 23:29:42,833 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 826 predicate places. [2021-12-17 23:29:42,833 INFO L470 AbstractCegarLoop]: Abstraction has has 914 places, 1224 transitions, 27118 flow [2021-12-17 23:29:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:42,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:42,834 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] [2021-12-17 23:29:42,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-12-17 23:29:42,834 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1448776530, now seen corresponding path program 234 times [2021-12-17 23:29:42,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455188518] [2021-12-17 23:29:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:42,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:29:43,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455188518] [2021-12-17 23:29:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455188518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:43,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:43,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:29:43,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458013613] [2021-12-17 23:29:43,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:43,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:29:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:29:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:29:43,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:43,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 1224 transitions, 27118 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:43,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:43,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:43,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:45,692 INFO L129 PetriNetUnfolder]: 745/2450 cut-off events. [2021-12-17 23:29:45,692 INFO L130 PetriNetUnfolder]: For 122936/122936 co-relation queries the response was YES. [2021-12-17 23:29:45,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27736 conditions, 2450 events. 745/2450 cut-off events. For 122936/122936 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20353 event pairs, 40 based on Foata normal form. 1/2448 useless extension candidates. Maximal degree in co-relation 27402. Up to 1809 conditions per place. [2021-12-17 23:29:45,766 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1086 selfloop transitions, 107 changer transitions 19/1251 dead transitions. [2021-12-17 23:29:45,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 941 places, 1251 transitions, 29814 flow [2021-12-17 23:29:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:29:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:29:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2021-12-17 23:29:45,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5594493116395495 [2021-12-17 23:29:45,768 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2021-12-17 23:29:45,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2021-12-17 23:29:45,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:45,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2021-12-17 23:29:45,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 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 23:29:45,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:29:45,771 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:29:45,771 INFO L186 Difference]: Start difference. First operand has 914 places, 1224 transitions, 27118 flow. Second operand 34 states and 1788 transitions. [2021-12-17 23:29:45,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 941 places, 1251 transitions, 29814 flow [2021-12-17 23:29:47,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 1251 transitions, 28709 flow, removed 194 selfloop flow, removed 39 redundant places. [2021-12-17 23:29:47,382 INFO L242 Difference]: Finished difference. Result has 906 places, 1214 transitions, 26114 flow [2021-12-17 23:29:47,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=26025, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26114, PETRI_PLACES=906, PETRI_TRANSITIONS=1214} [2021-12-17 23:29:47,383 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 818 predicate places. [2021-12-17 23:29:47,383 INFO L470 AbstractCegarLoop]: Abstraction has has 906 places, 1214 transitions, 26114 flow [2021-12-17 23:29:47,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:29:47,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:47,384 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] [2021-12-17 23:29:47,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-12-17 23:29:47,384 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1100848624, now seen corresponding path program 235 times [2021-12-17 23:29:47,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376004006] [2021-12-17 23:29:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:47,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:47,628 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 23:29:47,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:47,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376004006] [2021-12-17 23:29:47,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376004006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:47,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:47,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:29:47,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790408889] [2021-12-17 23:29:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:47,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:29:47,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:29:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:29:47,630 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:47,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 1214 transitions, 26114 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:47,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:47,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:47,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:49,682 INFO L129 PetriNetUnfolder]: 743/2432 cut-off events. [2021-12-17 23:29:49,682 INFO L130 PetriNetUnfolder]: For 116536/116536 co-relation queries the response was YES. [2021-12-17 23:29:49,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27182 conditions, 2432 events. 743/2432 cut-off events. For 116536/116536 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 20141 event pairs, 43 based on Foata normal form. 1/2430 useless extension candidates. Maximal degree in co-relation 26848. Up to 1823 conditions per place. [2021-12-17 23:29:49,752 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1078 selfloop transitions, 100 changer transitions 20/1237 dead transitions. [2021-12-17 23:29:49,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 918 places, 1237 transitions, 28668 flow [2021-12-17 23:29:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:29:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:29:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1649 transitions. [2021-12-17 23:29:49,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5658888126286891 [2021-12-17 23:29:49,754 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1649 transitions. [2021-12-17 23:29:49,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1649 transitions. [2021-12-17 23:29:49,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:49,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1649 transitions. [2021-12-17 23:29:49,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.193548387096776) internal successors, (1649), 31 states have internal predecessors, (1649), 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 23:29:49,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:29:49,756 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:29:49,756 INFO L186 Difference]: Start difference. First operand has 906 places, 1214 transitions, 26114 flow. Second operand 31 states and 1649 transitions. [2021-12-17 23:29:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 918 places, 1237 transitions, 28668 flow [2021-12-17 23:29:51,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 883 places, 1237 transitions, 28229 flow, removed 24 selfloop flow, removed 35 redundant places. [2021-12-17 23:29:51,224 INFO L242 Difference]: Finished difference. Result has 887 places, 1203 transitions, 25760 flow [2021-12-17 23:29:51,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25681, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25760, PETRI_PLACES=887, PETRI_TRANSITIONS=1203} [2021-12-17 23:29:51,225 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 799 predicate places. [2021-12-17 23:29:51,225 INFO L470 AbstractCegarLoop]: Abstraction has has 887 places, 1203 transitions, 25760 flow [2021-12-17 23:29:51,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:51,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:51,225 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] [2021-12-17 23:29:51,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-12-17 23:29:51,225 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash 761796610, now seen corresponding path program 236 times [2021-12-17 23:29:51,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469429362] [2021-12-17 23:29:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:51,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:51,466 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 23:29:51,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469429362] [2021-12-17 23:29:51,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469429362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:51,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:51,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:29:51,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548121144] [2021-12-17 23:29:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:51,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:29:51,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:29:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:29:51,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:51,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 1203 transitions, 25760 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:51,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:51,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:51,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:53,634 INFO L129 PetriNetUnfolder]: 738/2410 cut-off events. [2021-12-17 23:29:53,635 INFO L130 PetriNetUnfolder]: For 116248/116248 co-relation queries the response was YES. [2021-12-17 23:29:53,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26854 conditions, 2410 events. 738/2410 cut-off events. For 116248/116248 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 19856 event pairs, 41 based on Foata normal form. 1/2407 useless extension candidates. Maximal degree in co-relation 26525. Up to 1818 conditions per place. [2021-12-17 23:29:53,688 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1074 selfloop transitions, 92 changer transitions 22/1227 dead transitions. [2021-12-17 23:29:53,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 1227 transitions, 28306 flow [2021-12-17 23:29:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:29:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:29:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1645 transitions. [2021-12-17 23:29:53,690 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2021-12-17 23:29:53,690 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1645 transitions. [2021-12-17 23:29:53,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1645 transitions. [2021-12-17 23:29:53,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:53,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1645 transitions. [2021-12-17 23:29:53,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.064516129032256) internal successors, (1645), 31 states have internal predecessors, (1645), 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 23:29:53,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:29:53,693 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:29:53,693 INFO L186 Difference]: Start difference. First operand has 887 places, 1203 transitions, 25760 flow. Second operand 31 states and 1645 transitions. [2021-12-17 23:29:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 1227 transitions, 28306 flow [2021-12-17 23:29:54,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 1227 transitions, 27859 flow, removed 27 selfloop flow, removed 38 redundant places. [2021-12-17 23:29:55,015 INFO L242 Difference]: Finished difference. Result has 872 places, 1191 transitions, 25343 flow [2021-12-17 23:29:55,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25328, PETRI_DIFFERENCE_MINUEND_PLACES=837, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25343, PETRI_PLACES=872, PETRI_TRANSITIONS=1191} [2021-12-17 23:29:55,015 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 784 predicate places. [2021-12-17 23:29:55,015 INFO L470 AbstractCegarLoop]: Abstraction has has 872 places, 1191 transitions, 25343 flow [2021-12-17 23:29:55,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:29:55,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:55,016 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] [2021-12-17 23:29:55,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-12-17 23:29:55,016 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1182812748, now seen corresponding path program 237 times [2021-12-17 23:29:55,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891026347] [2021-12-17 23:29:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:55,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:55,308 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 23:29:55,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:55,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891026347] [2021-12-17 23:29:55,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891026347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:55,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:55,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:55,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359182906] [2021-12-17 23:29:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:55,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:55,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:55,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 1191 transitions, 25343 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:55,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:55,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:55,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:29:57,600 INFO L129 PetriNetUnfolder]: 739/2408 cut-off events. [2021-12-17 23:29:57,601 INFO L130 PetriNetUnfolder]: For 116574/116574 co-relation queries the response was YES. [2021-12-17 23:29:57,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26752 conditions, 2408 events. 739/2408 cut-off events. For 116574/116574 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19819 event pairs, 40 based on Foata normal form. 1/2406 useless extension candidates. Maximal degree in co-relation 26429. Up to 1692 conditions per place. [2021-12-17 23:29:57,672 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 992 selfloop transitions, 187 changer transitions 16/1234 dead transitions. [2021-12-17 23:29:57,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 894 places, 1234 transitions, 28543 flow [2021-12-17 23:29:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:29:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:29:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2003 transitions. [2021-12-17 23:29:57,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607502799552072 [2021-12-17 23:29:57,673 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2003 transitions. [2021-12-17 23:29:57,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2003 transitions. [2021-12-17 23:29:57,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:29:57,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2003 transitions. [2021-12-17 23:29:57,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.71052631578947) internal successors, (2003), 38 states have internal predecessors, (2003), 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 23:29:57,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:57,677 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:29:57,677 INFO L186 Difference]: Start difference. First operand has 872 places, 1191 transitions, 25343 flow. Second operand 38 states and 2003 transitions. [2021-12-17 23:29:57,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 894 places, 1234 transitions, 28543 flow [2021-12-17 23:29:59,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 861 places, 1234 transitions, 28266 flow, removed 13 selfloop flow, removed 33 redundant places. [2021-12-17 23:29:59,051 INFO L242 Difference]: Finished difference. Result has 869 places, 1196 transitions, 25742 flow [2021-12-17 23:29:59,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=25078, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=25742, PETRI_PLACES=869, PETRI_TRANSITIONS=1196} [2021-12-17 23:29:59,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 781 predicate places. [2021-12-17 23:29:59,051 INFO L470 AbstractCegarLoop]: Abstraction has has 869 places, 1196 transitions, 25742 flow [2021-12-17 23:29:59,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:59,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:29:59,052 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] [2021-12-17 23:29:59,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-12-17 23:29:59,052 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:29:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash -824828616, now seen corresponding path program 238 times [2021-12-17 23:29:59,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:59,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572589804] [2021-12-17 23:29:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:59,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:59,345 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 23:29:59,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:59,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572589804] [2021-12-17 23:29:59,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572589804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:59,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:59,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:29:59,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225064981] [2021-12-17 23:29:59,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:59,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:29:59,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:29:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:29:59,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:29:59,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 1196 transitions, 25742 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:29:59,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:29:59,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:29:59,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:01,584 INFO L129 PetriNetUnfolder]: 734/2399 cut-off events. [2021-12-17 23:30:01,584 INFO L130 PetriNetUnfolder]: For 114105/114105 co-relation queries the response was YES. [2021-12-17 23:30:01,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26659 conditions, 2399 events. 734/2399 cut-off events. For 114105/114105 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19716 event pairs, 41 based on Foata normal form. 1/2397 useless extension candidates. Maximal degree in co-relation 26335. Up to 1681 conditions per place. [2021-12-17 23:30:01,651 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 989 selfloop transitions, 154 changer transitions 43/1225 dead transitions. [2021-12-17 23:30:01,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 1225 transitions, 28414 flow [2021-12-17 23:30:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:30:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:30:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1847 transitions. [2021-12-17 23:30:01,652 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613981762917933 [2021-12-17 23:30:01,652 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1847 transitions. [2021-12-17 23:30:01,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1847 transitions. [2021-12-17 23:30:01,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:01,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1847 transitions. [2021-12-17 23:30:01,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.77142857142857) internal successors, (1847), 35 states have internal predecessors, (1847), 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 23:30:01,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:01,655 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:01,655 INFO L186 Difference]: Start difference. First operand has 869 places, 1196 transitions, 25742 flow. Second operand 35 states and 1847 transitions. [2021-12-17 23:30:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 1225 transitions, 28414 flow [2021-12-17 23:30:03,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 1225 transitions, 27661 flow, removed 149 selfloop flow, removed 32 redundant places. [2021-12-17 23:30:03,117 INFO L242 Difference]: Finished difference. Result has 870 places, 1161 transitions, 24643 flow [2021-12-17 23:30:03,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24997, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=24643, PETRI_PLACES=870, PETRI_TRANSITIONS=1161} [2021-12-17 23:30:03,118 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 782 predicate places. [2021-12-17 23:30:03,118 INFO L470 AbstractCegarLoop]: Abstraction has has 870 places, 1161 transitions, 24643 flow [2021-12-17 23:30:03,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:03,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:03,118 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] [2021-12-17 23:30:03,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-12-17 23:30:03,118 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash 652437138, now seen corresponding path program 239 times [2021-12-17 23:30:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:03,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450525794] [2021-12-17 23:30:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:03,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:03,361 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 23:30:03,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450525794] [2021-12-17 23:30:03,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450525794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:03,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:03,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:03,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508273971] [2021-12-17 23:30:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:03,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:03,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:03,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:03,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 1161 transitions, 24643 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:03,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:03,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:03,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:05,609 INFO L129 PetriNetUnfolder]: 726/2367 cut-off events. [2021-12-17 23:30:05,609 INFO L130 PetriNetUnfolder]: For 111245/111245 co-relation queries the response was YES. [2021-12-17 23:30:05,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26182 conditions, 2367 events. 726/2367 cut-off events. For 111245/111245 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 19359 event pairs, 43 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 25857. Up to 1577 conditions per place. [2021-12-17 23:30:05,682 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 904 selfloop transitions, 217 changer transitions 34/1194 dead transitions. [2021-12-17 23:30:05,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 1194 transitions, 27441 flow [2021-12-17 23:30:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:30:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:30:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1962 transitions. [2021-12-17 23:30:05,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5641173087981599 [2021-12-17 23:30:05,683 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1962 transitions. [2021-12-17 23:30:05,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1962 transitions. [2021-12-17 23:30:05,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:05,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1962 transitions. [2021-12-17 23:30:05,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.027027027027025) internal successors, (1962), 37 states have internal predecessors, (1962), 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 23:30:05,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:30:05,687 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:30:05,687 INFO L186 Difference]: Start difference. First operand has 870 places, 1161 transitions, 24643 flow. Second operand 37 states and 1962 transitions. [2021-12-17 23:30:05,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 1194 transitions, 27441 flow [2021-12-17 23:30:07,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 1194 transitions, 26853 flow, removed 81 selfloop flow, removed 38 redundant places. [2021-12-17 23:30:07,213 INFO L242 Difference]: Finished difference. Result has 859 places, 1143 transitions, 24286 flow [2021-12-17 23:30:07,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=24067, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24286, PETRI_PLACES=859, PETRI_TRANSITIONS=1143} [2021-12-17 23:30:07,214 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 771 predicate places. [2021-12-17 23:30:07,214 INFO L470 AbstractCegarLoop]: Abstraction has has 859 places, 1143 transitions, 24286 flow [2021-12-17 23:30:07,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:07,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:07,214 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] [2021-12-17 23:30:07,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-12-17 23:30:07,215 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1325527664, now seen corresponding path program 240 times [2021-12-17 23:30:07,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372274231] [2021-12-17 23:30:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:07,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:07,501 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 23:30:07,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372274231] [2021-12-17 23:30:07,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372274231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:07,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:07,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:30:07,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557973065] [2021-12-17 23:30:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:07,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:30:07,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:30:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:30:07,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:07,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 1143 transitions, 24286 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:07,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:07,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:07,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:09,589 INFO L129 PetriNetUnfolder]: 711/2315 cut-off events. [2021-12-17 23:30:09,589 INFO L130 PetriNetUnfolder]: For 110828/110828 co-relation queries the response was YES. [2021-12-17 23:30:09,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25667 conditions, 2315 events. 711/2315 cut-off events. For 110828/110828 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18764 event pairs, 40 based on Foata normal form. 1/2313 useless extension candidates. Maximal degree in co-relation 25346. Up to 1754 conditions per place. [2021-12-17 23:30:09,655 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 1021 selfloop transitions, 86 changer transitions 20/1166 dead transitions. [2021-12-17 23:30:09,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 1166 transitions, 26696 flow [2021-12-17 23:30:09,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:30:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:30:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1587 transitions. [2021-12-17 23:30:09,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5627659574468085 [2021-12-17 23:30:09,656 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1587 transitions. [2021-12-17 23:30:09,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1587 transitions. [2021-12-17 23:30:09,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:09,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1587 transitions. [2021-12-17 23:30:09,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.9) internal successors, (1587), 30 states have internal predecessors, (1587), 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 23:30:09,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:30:09,659 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:30:09,659 INFO L186 Difference]: Start difference. First operand has 859 places, 1143 transitions, 24286 flow. Second operand 30 states and 1587 transitions. [2021-12-17 23:30:09,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 1166 transitions, 26696 flow [2021-12-17 23:30:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 1166 transitions, 25923 flow, removed 41 selfloop flow, removed 42 redundant places. [2021-12-17 23:30:10,997 INFO L242 Difference]: Finished difference. Result has 838 places, 1133 transitions, 23530 flow [2021-12-17 23:30:10,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23519, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=23530, PETRI_PLACES=838, PETRI_TRANSITIONS=1133} [2021-12-17 23:30:10,997 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 750 predicate places. [2021-12-17 23:30:10,998 INFO L470 AbstractCegarLoop]: Abstraction has has 838 places, 1133 transitions, 23530 flow [2021-12-17 23:30:10,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:10,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:10,998 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] [2021-12-17 23:30:10,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-12-17 23:30:10,998 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash 376755812, now seen corresponding path program 241 times [2021-12-17 23:30:10,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:10,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643501998] [2021-12-17 23:30:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:10,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:11,257 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 23:30:11,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643501998] [2021-12-17 23:30:11,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643501998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:11,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:11,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:30:11,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077463170] [2021-12-17 23:30:11,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:11,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:30:11,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:30:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:30:11,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:11,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 1133 transitions, 23530 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:11,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:11,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:11,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:13,443 INFO L129 PetriNetUnfolder]: 712/2316 cut-off events. [2021-12-17 23:30:13,443 INFO L130 PetriNetUnfolder]: For 105358/105358 co-relation queries the response was YES. [2021-12-17 23:30:13,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25234 conditions, 2316 events. 712/2316 cut-off events. For 105358/105358 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18815 event pairs, 41 based on Foata normal form. 1/2314 useless extension candidates. Maximal degree in co-relation 24921. Up to 1669 conditions per place. [2021-12-17 23:30:13,501 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 961 selfloop transitions, 137 changer transitions 26/1163 dead transitions. [2021-12-17 23:30:13,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 1163 transitions, 26160 flow [2021-12-17 23:30:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:30:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:30:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1898 transitions. [2021-12-17 23:30:13,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5608747044917257 [2021-12-17 23:30:13,502 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1898 transitions. [2021-12-17 23:30:13,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1898 transitions. [2021-12-17 23:30:13,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:13,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1898 transitions. [2021-12-17 23:30:13,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.72222222222222) internal successors, (1898), 36 states have internal predecessors, (1898), 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 23:30:13,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:30:13,505 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:30:13,505 INFO L186 Difference]: Start difference. First operand has 838 places, 1133 transitions, 23530 flow. Second operand 36 states and 1898 transitions. [2021-12-17 23:30:13,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 1163 transitions, 26160 flow [2021-12-17 23:30:14,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 1163 transitions, 25734 flow, removed 31 selfloop flow, removed 30 redundant places. [2021-12-17 23:30:14,708 INFO L242 Difference]: Finished difference. Result has 830 places, 1122 transitions, 23209 flow [2021-12-17 23:30:14,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23121, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23209, PETRI_PLACES=830, PETRI_TRANSITIONS=1122} [2021-12-17 23:30:14,709 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 742 predicate places. [2021-12-17 23:30:14,709 INFO L470 AbstractCegarLoop]: Abstraction has has 830 places, 1122 transitions, 23209 flow [2021-12-17 23:30:14,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:14,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:14,709 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] [2021-12-17 23:30:14,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-12-17 23:30:14,709 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1094385382, now seen corresponding path program 242 times [2021-12-17 23:30:14,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:14,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079265654] [2021-12-17 23:30:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:14,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:14,986 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 23:30:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079265654] [2021-12-17 23:30:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079265654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:14,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:14,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:14,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844807174] [2021-12-17 23:30:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:14,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:14,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:14,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:14,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 830 places, 1122 transitions, 23209 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:14,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:14,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:14,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:17,138 INFO L129 PetriNetUnfolder]: 711/2318 cut-off events. [2021-12-17 23:30:17,138 INFO L130 PetriNetUnfolder]: For 105465/105465 co-relation queries the response was YES. [2021-12-17 23:30:17,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25139 conditions, 2318 events. 711/2318 cut-off events. For 105465/105465 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18820 event pairs, 39 based on Foata normal form. 1/2316 useless extension candidates. Maximal degree in co-relation 24831. Up to 1611 conditions per place. [2021-12-17 23:30:17,202 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 922 selfloop transitions, 195 changer transitions 15/1171 dead transitions. [2021-12-17 23:30:17,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 1171 transitions, 26838 flow [2021-12-17 23:30:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:30:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:30:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1863 transitions. [2021-12-17 23:30:17,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5662613981762918 [2021-12-17 23:30:17,204 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1863 transitions. [2021-12-17 23:30:17,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1863 transitions. [2021-12-17 23:30:17,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:17,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1863 transitions. [2021-12-17 23:30:17,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 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 23:30:17,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:17,207 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:17,207 INFO L186 Difference]: Start difference. First operand has 830 places, 1122 transitions, 23209 flow. Second operand 35 states and 1863 transitions. [2021-12-17 23:30:17,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 1171 transitions, 26838 flow [2021-12-17 23:30:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 1171 transitions, 26385 flow, removed 21 selfloop flow, removed 37 redundant places. [2021-12-17 23:30:18,470 INFO L242 Difference]: Finished difference. Result has 820 places, 1132 transitions, 23705 flow [2021-12-17 23:30:18,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=22770, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23705, PETRI_PLACES=820, PETRI_TRANSITIONS=1132} [2021-12-17 23:30:18,471 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 732 predicate places. [2021-12-17 23:30:18,471 INFO L470 AbstractCegarLoop]: Abstraction has has 820 places, 1132 transitions, 23705 flow [2021-12-17 23:30:18,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:18,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:18,471 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] [2021-12-17 23:30:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-12-17 23:30:18,472 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1569731740, now seen corresponding path program 243 times [2021-12-17 23:30:18,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593593546] [2021-12-17 23:30:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:18,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:18,758 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 23:30:18,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593593546] [2021-12-17 23:30:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593593546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:18,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:18,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:18,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179002954] [2021-12-17 23:30:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:18,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:18,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:18,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:18,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 1132 transitions, 23705 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:18,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:18,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:18,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:20,823 INFO L129 PetriNetUnfolder]: 711/2309 cut-off events. [2021-12-17 23:30:20,824 INFO L130 PetriNetUnfolder]: For 107651/107651 co-relation queries the response was YES. [2021-12-17 23:30:20,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25162 conditions, 2309 events. 711/2309 cut-off events. For 107651/107651 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18716 event pairs, 40 based on Foata normal form. 1/2306 useless extension candidates. Maximal degree in co-relation 24857. Up to 1474 conditions per place. [2021-12-17 23:30:20,887 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 833 selfloop transitions, 194 changer transitions 109/1175 dead transitions. [2021-12-17 23:30:20,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 1175 transitions, 26851 flow [2021-12-17 23:30:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:30:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:30:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2057 transitions. [2021-12-17 23:30:20,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.561102018548827 [2021-12-17 23:30:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2057 transitions. [2021-12-17 23:30:20,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2057 transitions. [2021-12-17 23:30:20,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:20,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2057 transitions. [2021-12-17 23:30:20,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.743589743589745) internal successors, (2057), 39 states have internal predecessors, (2057), 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 23:30:20,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:30:20,892 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:30:20,892 INFO L186 Difference]: Start difference. First operand has 820 places, 1132 transitions, 23705 flow. Second operand 39 states and 2057 transitions. [2021-12-17 23:30:20,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 1175 transitions, 26851 flow [2021-12-17 23:30:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 1175 transitions, 26316 flow, removed 152 selfloop flow, removed 31 redundant places. [2021-12-17 23:30:22,148 INFO L242 Difference]: Finished difference. Result has 828 places, 1048 transitions, 21572 flow [2021-12-17 23:30:22,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=23196, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=21572, PETRI_PLACES=828, PETRI_TRANSITIONS=1048} [2021-12-17 23:30:22,149 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 740 predicate places. [2021-12-17 23:30:22,149 INFO L470 AbstractCegarLoop]: Abstraction has has 828 places, 1048 transitions, 21572 flow [2021-12-17 23:30:22,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:22,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:22,149 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] [2021-12-17 23:30:22,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-12-17 23:30:22,149 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1045906738, now seen corresponding path program 244 times [2021-12-17 23:30:22,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549131317] [2021-12-17 23:30:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:22,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:22,406 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 23:30:22,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549131317] [2021-12-17 23:30:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549131317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:22,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:22,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:22,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65357924] [2021-12-17 23:30:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:22,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:22,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:22,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:22,407 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:22,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 828 places, 1048 transitions, 21572 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:22,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:22,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:22,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:24,181 INFO L129 PetriNetUnfolder]: 661/2114 cut-off events. [2021-12-17 23:30:24,181 INFO L130 PetriNetUnfolder]: For 96592/96592 co-relation queries the response was YES. [2021-12-17 23:30:24,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22930 conditions, 2114 events. 661/2114 cut-off events. For 96592/96592 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16570 event pairs, 41 based on Foata normal form. 1/2113 useless extension candidates. Maximal degree in co-relation 22625. Up to 1581 conditions per place. [2021-12-17 23:30:24,240 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 919 selfloop transitions, 68 changer transitions 42/1068 dead transitions. [2021-12-17 23:30:24,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 1068 transitions, 23767 flow [2021-12-17 23:30:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:30:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:30:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1744 transitions. [2021-12-17 23:30:24,243 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622179239200515 [2021-12-17 23:30:24,243 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1744 transitions. [2021-12-17 23:30:24,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1744 transitions. [2021-12-17 23:30:24,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:24,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1744 transitions. [2021-12-17 23:30:24,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 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 23:30:24,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:24,245 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:24,246 INFO L186 Difference]: Start difference. First operand has 828 places, 1048 transitions, 21572 flow. Second operand 33 states and 1744 transitions. [2021-12-17 23:30:24,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 1068 transitions, 23767 flow [2021-12-17 23:30:25,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1068 transitions, 22555 flow, removed 378 selfloop flow, removed 40 redundant places. [2021-12-17 23:30:25,379 INFO L242 Difference]: Finished difference. Result has 814 places, 1016 transitions, 20146 flow [2021-12-17 23:30:25,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=20364, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=980, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20146, PETRI_PLACES=814, PETRI_TRANSITIONS=1016} [2021-12-17 23:30:25,379 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 726 predicate places. [2021-12-17 23:30:25,379 INFO L470 AbstractCegarLoop]: Abstraction has has 814 places, 1016 transitions, 20146 flow [2021-12-17 23:30:25,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:25,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:25,380 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] [2021-12-17 23:30:25,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-12-17 23:30:25,380 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1728824890, now seen corresponding path program 245 times [2021-12-17 23:30:25,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895902198] [2021-12-17 23:30:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:25,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:25,640 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 23:30:25,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895902198] [2021-12-17 23:30:25,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895902198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:25,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:25,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:25,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863708445] [2021-12-17 23:30:25,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:25,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:25,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:25,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:25,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 1016 transitions, 20146 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:25,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:25,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:25,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:27,433 INFO L129 PetriNetUnfolder]: 647/2059 cut-off events. [2021-12-17 23:30:27,434 INFO L130 PetriNetUnfolder]: For 93290/93290 co-relation queries the response was YES. [2021-12-17 23:30:27,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21999 conditions, 2059 events. 647/2059 cut-off events. For 93290/93290 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16056 event pairs, 41 based on Foata normal form. 1/2057 useless extension candidates. Maximal degree in co-relation 21697. Up to 1414 conditions per place. [2021-12-17 23:30:27,487 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 793 selfloop transitions, 142 changer transitions 67/1041 dead transitions. [2021-12-17 23:30:27,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 1041 transitions, 22371 flow [2021-12-17 23:30:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:30:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:30:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1743 transitions. [2021-12-17 23:30:27,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5618955512572534 [2021-12-17 23:30:27,489 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1743 transitions. [2021-12-17 23:30:27,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1743 transitions. [2021-12-17 23:30:27,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:27,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1743 transitions. [2021-12-17 23:30:27,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:30:27,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:27,492 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:27,492 INFO L186 Difference]: Start difference. First operand has 814 places, 1016 transitions, 20146 flow. Second operand 33 states and 1743 transitions. [2021-12-17 23:30:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 1041 transitions, 22371 flow [2021-12-17 23:30:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1041 transitions, 21939 flow, removed 74 selfloop flow, removed 48 redundant places. [2021-12-17 23:30:28,462 INFO L242 Difference]: Finished difference. Result has 783 places, 958 transitions, 18669 flow [2021-12-17 23:30:28,463 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=19720, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=18669, PETRI_PLACES=783, PETRI_TRANSITIONS=958} [2021-12-17 23:30:28,463 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 695 predicate places. [2021-12-17 23:30:28,463 INFO L470 AbstractCegarLoop]: Abstraction has has 783 places, 958 transitions, 18669 flow [2021-12-17 23:30:28,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:28,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:28,463 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] [2021-12-17 23:30:28,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-12-17 23:30:28,464 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -933500258, now seen corresponding path program 246 times [2021-12-17 23:30:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725475739] [2021-12-17 23:30:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:28,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:28,730 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 23:30:28,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:28,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725475739] [2021-12-17 23:30:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725475739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:28,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:28,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:30:28,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456518738] [2021-12-17 23:30:28,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:28,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:30:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:30:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:30:28,732 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:28,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 958 transitions, 18669 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:30:28,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:28,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:28,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:31,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:30:33,561 INFO L129 PetriNetUnfolder]: 621/1987 cut-off events. [2021-12-17 23:30:33,561 INFO L130 PetriNetUnfolder]: For 86513/86513 co-relation queries the response was YES. [2021-12-17 23:30:33,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21008 conditions, 1987 events. 621/1987 cut-off events. For 86513/86513 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 15326 event pairs, 40 based on Foata normal form. 1/1985 useless extension candidates. Maximal degree in co-relation 20716. Up to 1505 conditions per place. [2021-12-17 23:30:33,614 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 861 selfloop transitions, 65 changer transitions 18/983 dead transitions. [2021-12-17 23:30:33,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 983 transitions, 20856 flow [2021-12-17 23:30:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:30:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:30:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1731 transitions. [2021-12-17 23:30:33,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558027079303675 [2021-12-17 23:30:33,616 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1731 transitions. [2021-12-17 23:30:33,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1731 transitions. [2021-12-17 23:30:33,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:33,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1731 transitions. [2021-12-17 23:30:33,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.45454545454545) internal successors, (1731), 33 states have internal predecessors, (1731), 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 23:30:33,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:33,619 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:33,619 INFO L186 Difference]: Start difference. First operand has 783 places, 958 transitions, 18669 flow. Second operand 33 states and 1731 transitions. [2021-12-17 23:30:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 983 transitions, 20856 flow [2021-12-17 23:30:34,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 983 transitions, 19980 flow, removed 223 selfloop flow, removed 37 redundant places. [2021-12-17 23:30:34,587 INFO L242 Difference]: Finished difference. Result has 767 places, 955 transitions, 17917 flow [2021-12-17 23:30:34,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17797, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=893, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17917, PETRI_PLACES=767, PETRI_TRANSITIONS=955} [2021-12-17 23:30:34,587 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 679 predicate places. [2021-12-17 23:30:34,587 INFO L470 AbstractCegarLoop]: Abstraction has has 767 places, 955 transitions, 17917 flow [2021-12-17 23:30:34,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:30:34,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:34,588 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] [2021-12-17 23:30:34,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-12-17 23:30:34,588 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1743584696, now seen corresponding path program 247 times [2021-12-17 23:30:34,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055041832] [2021-12-17 23:30:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:34,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:34,858 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 23:30:34,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055041832] [2021-12-17 23:30:34,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055041832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:34,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:34,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:30:34,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848853276] [2021-12-17 23:30:34,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:34,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:30:34,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:30:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:30:34,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:34,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 955 transitions, 17917 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:34,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:34,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:34,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:37,404 INFO L129 PetriNetUnfolder]: 620/1988 cut-off events. [2021-12-17 23:30:37,404 INFO L130 PetriNetUnfolder]: For 87496/87496 co-relation queries the response was YES. [2021-12-17 23:30:37,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20854 conditions, 1988 events. 620/1988 cut-off events. For 87496/87496 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15325 event pairs, 43 based on Foata normal form. 1/1986 useless extension candidates. Maximal degree in co-relation 20565. Up to 1397 conditions per place. [2021-12-17 23:30:37,454 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 791 selfloop transitions, 153 changer transitions 16/999 dead transitions. [2021-12-17 23:30:37,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 999 transitions, 21009 flow [2021-12-17 23:30:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:30:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:30:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1857 transitions. [2021-12-17 23:30:37,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5644376899696049 [2021-12-17 23:30:37,455 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1857 transitions. [2021-12-17 23:30:37,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1857 transitions. [2021-12-17 23:30:37,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:37,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1857 transitions. [2021-12-17 23:30:37,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.05714285714286) internal successors, (1857), 35 states have internal predecessors, (1857), 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 23:30:37,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:37,458 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:37,459 INFO L186 Difference]: Start difference. First operand has 767 places, 955 transitions, 17917 flow. Second operand 35 states and 1857 transitions. [2021-12-17 23:30:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 999 transitions, 21009 flow [2021-12-17 23:30:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 999 transitions, 20782 flow, removed 18 selfloop flow, removed 35 redundant places. [2021-12-17 23:30:38,289 INFO L242 Difference]: Finished difference. Result has 765 places, 957 transitions, 18259 flow [2021-12-17 23:30:38,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17704, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18259, PETRI_PLACES=765, PETRI_TRANSITIONS=957} [2021-12-17 23:30:38,290 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 677 predicate places. [2021-12-17 23:30:38,290 INFO L470 AbstractCegarLoop]: Abstraction has has 765 places, 957 transitions, 18259 flow [2021-12-17 23:30:38,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:30:38,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:38,290 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] [2021-12-17 23:30:38,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-12-17 23:30:38,290 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash -562915278, now seen corresponding path program 248 times [2021-12-17 23:30:38,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102293054] [2021-12-17 23:30:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:38,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:38,542 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 23:30:38,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102293054] [2021-12-17 23:30:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102293054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:38,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:38,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:30:38,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954017361] [2021-12-17 23:30:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:38,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:30:38,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:30:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:30:38,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:38,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 957 transitions, 18259 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:38,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:38,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:38,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:40,267 INFO L129 PetriNetUnfolder]: 623/1993 cut-off events. [2021-12-17 23:30:40,267 INFO L130 PetriNetUnfolder]: For 88600/88600 co-relation queries the response was YES. [2021-12-17 23:30:40,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21032 conditions, 1993 events. 623/1993 cut-off events. For 88600/88600 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15366 event pairs, 42 based on Foata normal form. 1/1991 useless extension candidates. Maximal degree in co-relation 20745. Up to 1403 conditions per place. [2021-12-17 23:30:40,321 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 784 selfloop transitions, 157 changer transitions 20/1000 dead transitions. [2021-12-17 23:30:40,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 1000 transitions, 21123 flow [2021-12-17 23:30:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:30:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:30:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1663 transitions. [2021-12-17 23:30:40,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706932052161977 [2021-12-17 23:30:40,323 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1663 transitions. [2021-12-17 23:30:40,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1663 transitions. [2021-12-17 23:30:40,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:40,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1663 transitions. [2021-12-17 23:30:40,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.645161290322584) internal successors, (1663), 31 states have internal predecessors, (1663), 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 23:30:40,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:30:40,326 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:30:40,326 INFO L186 Difference]: Start difference. First operand has 765 places, 957 transitions, 18259 flow. Second operand 31 states and 1663 transitions. [2021-12-17 23:30:40,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 1000 transitions, 21123 flow [2021-12-17 23:30:41,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 1000 transitions, 20717 flow, removed 102 selfloop flow, removed 30 redundant places. [2021-12-17 23:30:41,254 INFO L242 Difference]: Finished difference. Result has 768 places, 959 transitions, 18398 flow [2021-12-17 23:30:41,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17880, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18398, PETRI_PLACES=768, PETRI_TRANSITIONS=959} [2021-12-17 23:30:41,255 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-12-17 23:30:41,255 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 959 transitions, 18398 flow [2021-12-17 23:30:41,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:41,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:41,255 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] [2021-12-17 23:30:41,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-12-17 23:30:41,255 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1386914872, now seen corresponding path program 249 times [2021-12-17 23:30:41,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:41,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949945653] [2021-12-17 23:30:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:41,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:41,542 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 23:30:41,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949945653] [2021-12-17 23:30:41,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949945653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:41,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:41,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:30:41,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504268629] [2021-12-17 23:30:41,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:41,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:30:41,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:30:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:41,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:41,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 959 transitions, 18398 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:41,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:41,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:41,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:43,396 INFO L129 PetriNetUnfolder]: 622/1990 cut-off events. [2021-12-17 23:30:43,397 INFO L130 PetriNetUnfolder]: For 92667/92667 co-relation queries the response was YES. [2021-12-17 23:30:43,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21150 conditions, 1990 events. 622/1990 cut-off events. For 92667/92667 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15364 event pairs, 40 based on Foata normal form. 1/1988 useless extension candidates. Maximal degree in co-relation 20860. Up to 1367 conditions per place. [2021-12-17 23:30:43,447 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 751 selfloop transitions, 192 changer transitions 18/1000 dead transitions. [2021-12-17 23:30:43,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 1000 transitions, 21256 flow [2021-12-17 23:30:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:30:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:30:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1964 transitions. [2021-12-17 23:30:43,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5646923519263944 [2021-12-17 23:30:43,449 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1964 transitions. [2021-12-17 23:30:43,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1964 transitions. [2021-12-17 23:30:43,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:43,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1964 transitions. [2021-12-17 23:30:43,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.08108108108108) internal successors, (1964), 37 states have internal predecessors, (1964), 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 23:30:43,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:30:43,452 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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 23:30:43,452 INFO L186 Difference]: Start difference. First operand has 768 places, 959 transitions, 18398 flow. Second operand 37 states and 1964 transitions. [2021-12-17 23:30:43,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 1000 transitions, 21256 flow [2021-12-17 23:30:44,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1000 transitions, 20925 flow, removed 66 selfloop flow, removed 24 redundant places. [2021-12-17 23:30:44,344 INFO L242 Difference]: Finished difference. Result has 782 places, 961 transitions, 18707 flow [2021-12-17 23:30:44,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18085, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18707, PETRI_PLACES=782, PETRI_TRANSITIONS=961} [2021-12-17 23:30:44,345 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 694 predicate places. [2021-12-17 23:30:44,345 INFO L470 AbstractCegarLoop]: Abstraction has has 782 places, 961 transitions, 18707 flow [2021-12-17 23:30:44,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:30:44,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:44,345 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] [2021-12-17 23:30:44,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-12-17 23:30:44,345 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash 382190460, now seen corresponding path program 250 times [2021-12-17 23:30:44,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922089794] [2021-12-17 23:30:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:44,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:44,658 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 23:30:44,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922089794] [2021-12-17 23:30:44,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922089794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:44,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:44,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:30:44,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575141633] [2021-12-17 23:30:44,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:44,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:30:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:30:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:30:44,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:44,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 961 transitions, 18707 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:30:44,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:44,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:44,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:48,053 INFO L129 PetriNetUnfolder]: 617/1979 cut-off events. [2021-12-17 23:30:48,053 INFO L130 PetriNetUnfolder]: For 89300/89300 co-relation queries the response was YES. [2021-12-17 23:30:48,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21019 conditions, 1979 events. 617/1979 cut-off events. For 89300/89300 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15189 event pairs, 44 based on Foata normal form. 1/1976 useless extension candidates. Maximal degree in co-relation 20728. Up to 1498 conditions per place. [2021-12-17 23:30:48,188 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 861 selfloop transitions, 67 changer transitions 15/982 dead transitions. [2021-12-17 23:30:48,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 982 transitions, 20942 flow [2021-12-17 23:30:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 23:30:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-17 23:30:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1828 transitions. [2021-12-17 23:30:48,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5556231003039513 [2021-12-17 23:30:48,190 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1828 transitions. [2021-12-17 23:30:48,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1828 transitions. [2021-12-17 23:30:48,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:48,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1828 transitions. [2021-12-17 23:30:48,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.22857142857143) internal successors, (1828), 35 states have internal predecessors, (1828), 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 23:30:48,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:48,193 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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 23:30:48,193 INFO L186 Difference]: Start difference. First operand has 782 places, 961 transitions, 18707 flow. Second operand 35 states and 1828 transitions. [2021-12-17 23:30:48,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 982 transitions, 20942 flow [2021-12-17 23:30:49,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 982 transitions, 20582 flow, removed 65 selfloop flow, removed 31 redundant places. [2021-12-17 23:30:49,051 INFO L242 Difference]: Finished difference. Result has 785 places, 956 transitions, 18486 flow [2021-12-17 23:30:49,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18363, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18486, PETRI_PLACES=785, PETRI_TRANSITIONS=956} [2021-12-17 23:30:49,051 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 697 predicate places. [2021-12-17 23:30:49,051 INFO L470 AbstractCegarLoop]: Abstraction has has 785 places, 956 transitions, 18486 flow [2021-12-17 23:30:49,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:30:49,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:49,052 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] [2021-12-17 23:30:49,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-12-17 23:30:49,052 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -393997170, now seen corresponding path program 251 times [2021-12-17 23:30:49,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545397426] [2021-12-17 23:30:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:49,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:49,327 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 23:30:49,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545397426] [2021-12-17 23:30:49,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545397426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:49,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:49,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:30:49,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191540969] [2021-12-17 23:30:49,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:49,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:30:49,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:30:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:30:49,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:49,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 956 transitions, 18486 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:49,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:49,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:49,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:51,046 INFO L129 PetriNetUnfolder]: 620/1995 cut-off events. [2021-12-17 23:30:51,046 INFO L130 PetriNetUnfolder]: For 88875/88875 co-relation queries the response was YES. [2021-12-17 23:30:51,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21219 conditions, 1995 events. 620/1995 cut-off events. For 88875/88875 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15415 event pairs, 43 based on Foata normal form. 1/1993 useless extension candidates. Maximal degree in co-relation 20928. Up to 1453 conditions per place. [2021-12-17 23:30:51,096 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 822 selfloop transitions, 109 changer transitions 23/993 dead transitions. [2021-12-17 23:30:51,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 993 transitions, 21259 flow [2021-12-17 23:30:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:30:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:30:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1608 transitions. [2021-12-17 23:30:51,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2021-12-17 23:30:51,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1608 transitions. [2021-12-17 23:30:51,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1608 transitions. [2021-12-17 23:30:51,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:51,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1608 transitions. [2021-12-17 23:30:51,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.6) internal successors, (1608), 30 states have internal predecessors, (1608), 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 23:30:51,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:30:51,100 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:30:51,100 INFO L186 Difference]: Start difference. First operand has 785 places, 956 transitions, 18486 flow. Second operand 30 states and 1608 transitions. [2021-12-17 23:30:51,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 993 transitions, 21259 flow [2021-12-17 23:30:51,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 993 transitions, 21041 flow, removed 25 selfloop flow, removed 35 redundant places. [2021-12-17 23:30:51,951 INFO L242 Difference]: Finished difference. Result has 778 places, 952 transitions, 18590 flow [2021-12-17 23:30:51,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18292, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18590, PETRI_PLACES=778, PETRI_TRANSITIONS=952} [2021-12-17 23:30:51,951 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-12-17 23:30:51,951 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 952 transitions, 18590 flow [2021-12-17 23:30:51,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:51,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:51,951 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] [2021-12-17 23:30:51,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-12-17 23:30:51,952 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 189835726, now seen corresponding path program 252 times [2021-12-17 23:30:51,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971130319] [2021-12-17 23:30:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:51,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:52,196 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 23:30:52,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971130319] [2021-12-17 23:30:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971130319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:52,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:52,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:30:52,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680757688] [2021-12-17 23:30:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:52,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:30:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:30:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:30:52,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:52,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 952 transitions, 18590 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:52,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:52,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:52,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:53,884 INFO L129 PetriNetUnfolder]: 612/1969 cut-off events. [2021-12-17 23:30:53,884 INFO L130 PetriNetUnfolder]: For 91278/91278 co-relation queries the response was YES. [2021-12-17 23:30:53,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21050 conditions, 1969 events. 612/1969 cut-off events. For 91278/91278 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15224 event pairs, 42 based on Foata normal form. 1/1967 useless extension candidates. Maximal degree in co-relation 20759. Up to 1381 conditions per place. [2021-12-17 23:30:53,934 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 774 selfloop transitions, 160 changer transitions 20/993 dead transitions. [2021-12-17 23:30:53,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 993 transitions, 21348 flow [2021-12-17 23:30:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:30:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:30:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1761 transitions. [2021-12-17 23:30:54,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5676982591876208 [2021-12-17 23:30:54,024 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1761 transitions. [2021-12-17 23:30:54,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1761 transitions. [2021-12-17 23:30:54,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:54,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1761 transitions. [2021-12-17 23:30:54,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.36363636363637) internal successors, (1761), 33 states have internal predecessors, (1761), 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 23:30:54,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:54,027 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:54,027 INFO L186 Difference]: Start difference. First operand has 778 places, 952 transitions, 18590 flow. Second operand 33 states and 1761 transitions. [2021-12-17 23:30:54,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 993 transitions, 21348 flow [2021-12-17 23:30:54,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 993 transitions, 20936 flow, removed 82 selfloop flow, removed 28 redundant places. [2021-12-17 23:30:54,869 INFO L242 Difference]: Finished difference. Result has 781 places, 953 transitions, 18807 flow [2021-12-17 23:30:54,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18204, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=18807, PETRI_PLACES=781, PETRI_TRANSITIONS=953} [2021-12-17 23:30:54,870 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 693 predicate places. [2021-12-17 23:30:54,870 INFO L470 AbstractCegarLoop]: Abstraction has has 781 places, 953 transitions, 18807 flow [2021-12-17 23:30:54,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:30:54,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:54,870 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] [2021-12-17 23:30:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-12-17 23:30:54,870 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1167528638, now seen corresponding path program 253 times [2021-12-17 23:30:54,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698647315] [2021-12-17 23:30:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:54,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:30:55,144 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 23:30:55,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698647315] [2021-12-17 23:30:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698647315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:30:55,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:55,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:30:55,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697718094] [2021-12-17 23:30:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:30:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:30:55,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:30:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:30:55,146 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:30:55,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 953 transitions, 18807 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:30:55,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:30:55,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:30:55,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:30:57,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:30:58,856 INFO L129 PetriNetUnfolder]: 605/1955 cut-off events. [2021-12-17 23:30:58,857 INFO L130 PetriNetUnfolder]: For 85077/85077 co-relation queries the response was YES. [2021-12-17 23:30:58,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20795 conditions, 1955 events. 605/1955 cut-off events. For 85077/85077 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15036 event pairs, 45 based on Foata normal form. 1/1953 useless extension candidates. Maximal degree in co-relation 20504. Up to 1489 conditions per place. [2021-12-17 23:30:58,908 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 857 selfloop transitions, 52 changer transitions 24/972 dead transitions. [2021-12-17 23:30:58,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 972 transitions, 20805 flow [2021-12-17 23:30:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:30:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:30:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1723 transitions. [2021-12-17 23:30:58,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5554480980012895 [2021-12-17 23:30:58,910 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1723 transitions. [2021-12-17 23:30:58,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1723 transitions. [2021-12-17 23:30:58,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:30:58,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1723 transitions. [2021-12-17 23:30:58,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.21212121212121) internal successors, (1723), 33 states have internal predecessors, (1723), 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 23:30:58,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:58,913 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:30:58,913 INFO L186 Difference]: Start difference. First operand has 781 places, 953 transitions, 18807 flow. Second operand 33 states and 1723 transitions. [2021-12-17 23:30:58,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 972 transitions, 20805 flow [2021-12-17 23:30:59,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 972 transitions, 20249 flow, removed 138 selfloop flow, removed 28 redundant places. [2021-12-17 23:30:59,861 INFO L242 Difference]: Finished difference. Result has 784 places, 938 transitions, 18201 flow [2021-12-17 23:30:59,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=18257, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=901, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=18201, PETRI_PLACES=784, PETRI_TRANSITIONS=938} [2021-12-17 23:30:59,861 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 696 predicate places. [2021-12-17 23:30:59,861 INFO L470 AbstractCegarLoop]: Abstraction has has 784 places, 938 transitions, 18201 flow [2021-12-17 23:30:59,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:30:59,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:30:59,862 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] [2021-12-17 23:30:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-12-17 23:30:59,862 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:30:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash 317875894, now seen corresponding path program 254 times [2021-12-17 23:30:59,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939066540] [2021-12-17 23:30:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:59,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:00,147 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 23:31:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:00,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939066540] [2021-12-17 23:31:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939066540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:00,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:00,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:00,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570346602] [2021-12-17 23:31:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:00,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:00,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:00,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:00,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:00,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 938 transitions, 18201 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:00,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:00,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:00,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:01,935 INFO L129 PetriNetUnfolder]: 607/1957 cut-off events. [2021-12-17 23:31:01,935 INFO L130 PetriNetUnfolder]: For 88736/88736 co-relation queries the response was YES. [2021-12-17 23:31:01,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20729 conditions, 1957 events. 607/1957 cut-off events. For 88736/88736 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15024 event pairs, 38 based on Foata normal form. 1/1956 useless extension candidates. Maximal degree in co-relation 20438. Up to 1356 conditions per place. [2021-12-17 23:31:01,990 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 744 selfloop transitions, 177 changer transitions 17/977 dead transitions. [2021-12-17 23:31:01,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 977 transitions, 20796 flow [2021-12-17 23:31:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:31:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:31:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1912 transitions. [2021-12-17 23:31:01,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2021-12-17 23:31:01,991 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1912 transitions. [2021-12-17 23:31:01,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1912 transitions. [2021-12-17 23:31:01,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:01,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1912 transitions. [2021-12-17 23:31:01,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.111111111111114) internal successors, (1912), 36 states have internal predecessors, (1912), 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 23:31:02,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:31:02,083 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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 23:31:02,083 INFO L186 Difference]: Start difference. First operand has 784 places, 938 transitions, 18201 flow. Second operand 36 states and 1912 transitions. [2021-12-17 23:31:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 977 transitions, 20796 flow [2021-12-17 23:31:02,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 977 transitions, 20202 flow, removed 161 selfloop flow, removed 32 redundant places. [2021-12-17 23:31:02,875 INFO L242 Difference]: Finished difference. Result has 764 places, 939 transitions, 18255 flow [2021-12-17 23:31:02,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17653, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18255, PETRI_PLACES=764, PETRI_TRANSITIONS=939} [2021-12-17 23:31:02,875 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 676 predicate places. [2021-12-17 23:31:02,875 INFO L470 AbstractCegarLoop]: Abstraction has has 764 places, 939 transitions, 18255 flow [2021-12-17 23:31:02,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:02,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:02,876 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] [2021-12-17 23:31:02,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-12-17 23:31:02,876 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -280808684, now seen corresponding path program 255 times [2021-12-17 23:31:02,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:02,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173802740] [2021-12-17 23:31:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:02,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:03,142 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 23:31:03,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:03,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173802740] [2021-12-17 23:31:03,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173802740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:03,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:03,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:03,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003634319] [2021-12-17 23:31:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:03,143 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:03,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 939 transitions, 18255 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:03,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:03,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:03,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:04,779 INFO L129 PetriNetUnfolder]: 601/1943 cut-off events. [2021-12-17 23:31:04,779 INFO L130 PetriNetUnfolder]: For 76877/76877 co-relation queries the response was YES. [2021-12-17 23:31:04,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20013 conditions, 1943 events. 601/1943 cut-off events. For 76877/76877 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14936 event pairs, 47 based on Foata normal form. 1/1940 useless extension candidates. Maximal degree in co-relation 19731. Up to 1361 conditions per place. [2021-12-17 23:31:04,834 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 756 selfloop transitions, 125 changer transitions 45/965 dead transitions. [2021-12-17 23:31:04,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 965 transitions, 20333 flow [2021-12-17 23:31:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:31:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:31:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1691 transitions. [2021-12-17 23:31:04,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5621675531914894 [2021-12-17 23:31:04,836 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1691 transitions. [2021-12-17 23:31:04,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1691 transitions. [2021-12-17 23:31:04,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:04,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1691 transitions. [2021-12-17 23:31:04,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 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 23:31:04,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:31:04,839 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:31:04,839 INFO L186 Difference]: Start difference. First operand has 764 places, 939 transitions, 18255 flow. Second operand 32 states and 1691 transitions. [2021-12-17 23:31:04,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 965 transitions, 20333 flow [2021-12-17 23:31:05,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 965 transitions, 19727 flow, removed 103 selfloop flow, removed 32 redundant places. [2021-12-17 23:31:05,676 INFO L242 Difference]: Finished difference. Result has 762 places, 906 transitions, 17247 flow [2021-12-17 23:31:05,676 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=17655, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17247, PETRI_PLACES=762, PETRI_TRANSITIONS=906} [2021-12-17 23:31:05,677 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 674 predicate places. [2021-12-17 23:31:05,677 INFO L470 AbstractCegarLoop]: Abstraction has has 762 places, 906 transitions, 17247 flow [2021-12-17 23:31:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:05,677 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:05,677 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] [2021-12-17 23:31:05,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-12-17 23:31:05,677 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1994288816, now seen corresponding path program 256 times [2021-12-17 23:31:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:05,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598078198] [2021-12-17 23:31:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:05,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:05,947 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 23:31:05,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:05,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598078198] [2021-12-17 23:31:05,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598078198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:05,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:05,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:05,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283549865] [2021-12-17 23:31:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:05,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:05,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:05,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:05,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 906 transitions, 17247 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:05,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:05,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:05,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:07,693 INFO L129 PetriNetUnfolder]: 591/1892 cut-off events. [2021-12-17 23:31:07,693 INFO L130 PetriNetUnfolder]: For 78360/78360 co-relation queries the response was YES. [2021-12-17 23:31:07,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 1892 events. 591/1892 cut-off events. For 78360/78360 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 14341 event pairs, 38 based on Foata normal form. 1/1891 useless extension candidates. Maximal degree in co-relation 19252. Up to 1381 conditions per place. [2021-12-17 23:31:07,743 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 774 selfloop transitions, 109 changer transitions 17/939 dead transitions. [2021-12-17 23:31:07,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 939 transitions, 19671 flow [2021-12-17 23:31:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:31:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:31:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1751 transitions. [2021-12-17 23:31:07,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.564474532559639 [2021-12-17 23:31:07,753 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1751 transitions. [2021-12-17 23:31:07,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1751 transitions. [2021-12-17 23:31:07,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:07,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1751 transitions. [2021-12-17 23:31:07,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.06060606060606) internal successors, (1751), 33 states have internal predecessors, (1751), 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 23:31:07,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:07,757 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:07,757 INFO L186 Difference]: Start difference. First operand has 762 places, 906 transitions, 17247 flow. Second operand 33 states and 1751 transitions. [2021-12-17 23:31:07,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 939 transitions, 19671 flow [2021-12-17 23:31:08,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 939 transitions, 19146 flow, removed 84 selfloop flow, removed 41 redundant places. [2021-12-17 23:31:08,586 INFO L242 Difference]: Finished difference. Result has 747 places, 905 transitions, 17123 flow [2021-12-17 23:31:08,586 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16738, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17123, PETRI_PLACES=747, PETRI_TRANSITIONS=905} [2021-12-17 23:31:08,587 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 659 predicate places. [2021-12-17 23:31:08,587 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 905 transitions, 17123 flow [2021-12-17 23:31:08,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:08,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:08,587 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] [2021-12-17 23:31:08,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-12-17 23:31:08,587 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1737411996, now seen corresponding path program 257 times [2021-12-17 23:31:08,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46659103] [2021-12-17 23:31:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:08,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:08,952 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 23:31:08,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:08,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46659103] [2021-12-17 23:31:08,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46659103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:08,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:08,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:31:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994885642] [2021-12-17 23:31:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:31:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:31:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:31:08,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:08,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 905 transitions, 17123 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:08,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:08,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:08,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:10,648 INFO L129 PetriNetUnfolder]: 585/1886 cut-off events. [2021-12-17 23:31:10,648 INFO L130 PetriNetUnfolder]: For 76434/76434 co-relation queries the response was YES. [2021-12-17 23:31:10,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19168 conditions, 1886 events. 585/1886 cut-off events. For 76434/76434 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 14318 event pairs, 42 based on Foata normal form. 1/1884 useless extension candidates. Maximal degree in co-relation 18894. Up to 1351 conditions per place. [2021-12-17 23:31:10,693 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 748 selfloop transitions, 82 changer transitions 58/927 dead transitions. [2021-12-17 23:31:10,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 927 transitions, 19091 flow [2021-12-17 23:31:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:31:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:31:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1737 transitions. [2021-12-17 23:31:10,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5599613152804642 [2021-12-17 23:31:10,695 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1737 transitions. [2021-12-17 23:31:10,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1737 transitions. [2021-12-17 23:31:10,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:10,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1737 transitions. [2021-12-17 23:31:10,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.63636363636363) internal successors, (1737), 33 states have internal predecessors, (1737), 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 23:31:10,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:10,698 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:10,698 INFO L186 Difference]: Start difference. First operand has 747 places, 905 transitions, 17123 flow. Second operand 33 states and 1737 transitions. [2021-12-17 23:31:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 927 transitions, 19091 flow [2021-12-17 23:31:11,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 927 transitions, 18522 flow, removed 136 selfloop flow, removed 31 redundant places. [2021-12-17 23:31:11,378 INFO L242 Difference]: Finished difference. Result has 746 places, 859 transitions, 15952 flow [2021-12-17 23:31:11,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16562, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=15952, PETRI_PLACES=746, PETRI_TRANSITIONS=859} [2021-12-17 23:31:11,378 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 658 predicate places. [2021-12-17 23:31:11,378 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 859 transitions, 15952 flow [2021-12-17 23:31:11,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:11,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:11,379 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] [2021-12-17 23:31:11,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-12-17 23:31:11,379 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 209510938, now seen corresponding path program 258 times [2021-12-17 23:31:11,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874059713] [2021-12-17 23:31:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:11,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:11,680 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 23:31:11,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874059713] [2021-12-17 23:31:11,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874059713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:11,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:11,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:31:11,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118593403] [2021-12-17 23:31:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:11,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:31:11,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:31:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:31:11,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:11,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 859 transitions, 15952 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:11,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:11,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:11,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:13,886 INFO L129 PetriNetUnfolder]: 581/1854 cut-off events. [2021-12-17 23:31:13,886 INFO L130 PetriNetUnfolder]: For 75991/75991 co-relation queries the response was YES. [2021-12-17 23:31:13,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18965 conditions, 1854 events. 581/1854 cut-off events. For 75991/75991 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13933 event pairs, 45 based on Foata normal form. 1/1853 useless extension candidates. Maximal degree in co-relation 18692. Up to 1226 conditions per place. [2021-12-17 23:31:13,930 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 683 selfloop transitions, 176 changer transitions 18/916 dead transitions. [2021-12-17 23:31:13,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 916 transitions, 19293 flow [2021-12-17 23:31:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:31:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 23:31:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2060 transitions. [2021-12-17 23:31:13,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5619203491543917 [2021-12-17 23:31:13,931 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2060 transitions. [2021-12-17 23:31:13,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2060 transitions. [2021-12-17 23:31:13,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:13,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2060 transitions. [2021-12-17 23:31:13,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.82051282051282) internal successors, (2060), 39 states have internal predecessors, (2060), 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 23:31:13,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:31:13,935 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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 23:31:13,935 INFO L186 Difference]: Start difference. First operand has 746 places, 859 transitions, 15952 flow. Second operand 39 states and 2060 transitions. [2021-12-17 23:31:13,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 916 transitions, 19293 flow [2021-12-17 23:31:14,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 916 transitions, 18713 flow, removed 111 selfloop flow, removed 42 redundant places. [2021-12-17 23:31:14,623 INFO L242 Difference]: Finished difference. Result has 729 places, 874 transitions, 16366 flow [2021-12-17 23:31:14,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15418, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16366, PETRI_PLACES=729, PETRI_TRANSITIONS=874} [2021-12-17 23:31:14,624 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 641 predicate places. [2021-12-17 23:31:14,624 INFO L470 AbstractCegarLoop]: Abstraction has has 729 places, 874 transitions, 16366 flow [2021-12-17 23:31:14,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:14,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:14,624 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] [2021-12-17 23:31:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-12-17 23:31:14,624 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 495895318, now seen corresponding path program 259 times [2021-12-17 23:31:14,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883158467] [2021-12-17 23:31:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:14,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:14,893 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 23:31:14,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883158467] [2021-12-17 23:31:14,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883158467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:14,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:14,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:14,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471523025] [2021-12-17 23:31:14,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:14,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:14,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:14,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:14,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 874 transitions, 16366 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:14,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:14,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:14,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:16,421 INFO L129 PetriNetUnfolder]: 574/1833 cut-off events. [2021-12-17 23:31:16,421 INFO L130 PetriNetUnfolder]: For 72864/72864 co-relation queries the response was YES. [2021-12-17 23:31:16,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18449 conditions, 1833 events. 574/1833 cut-off events. For 72864/72864 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13719 event pairs, 41 based on Foata normal form. 1/1832 useless extension candidates. Maximal degree in co-relation 18182. Up to 1236 conditions per place. [2021-12-17 23:31:16,467 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 679 selfloop transitions, 123 changer transitions 61/902 dead transitions. [2021-12-17 23:31:16,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 902 transitions, 18301 flow [2021-12-17 23:31:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:31:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:31:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1755 transitions. [2021-12-17 23:31:16,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5657640232108317 [2021-12-17 23:31:16,469 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1755 transitions. [2021-12-17 23:31:16,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1755 transitions. [2021-12-17 23:31:16,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:16,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1755 transitions. [2021-12-17 23:31:16,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.18181818181818) internal successors, (1755), 33 states have internal predecessors, (1755), 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 23:31:16,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:16,472 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:16,472 INFO L186 Difference]: Start difference. First operand has 729 places, 874 transitions, 16366 flow. Second operand 33 states and 1755 transitions. [2021-12-17 23:31:16,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 902 transitions, 18301 flow [2021-12-17 23:31:17,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 902 transitions, 17740 flow, removed 168 selfloop flow, removed 31 redundant places. [2021-12-17 23:31:17,130 INFO L242 Difference]: Finished difference. Result has 730 places, 821 transitions, 14787 flow [2021-12-17 23:31:17,130 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=15811, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14787, PETRI_PLACES=730, PETRI_TRANSITIONS=821} [2021-12-17 23:31:17,131 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 642 predicate places. [2021-12-17 23:31:17,131 INFO L470 AbstractCegarLoop]: Abstraction has has 730 places, 821 transitions, 14787 flow [2021-12-17 23:31:17,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:17,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:17,131 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] [2021-12-17 23:31:17,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-12-17 23:31:17,131 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1265349642, now seen corresponding path program 260 times [2021-12-17 23:31:17,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:17,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9056368] [2021-12-17 23:31:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:17,402 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 23:31:17,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9056368] [2021-12-17 23:31:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9056368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:17,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773395622] [2021-12-17 23:31:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:17,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:17,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:17,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 821 transitions, 14787 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:17,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:17,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:17,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:18,876 INFO L129 PetriNetUnfolder]: 549/1742 cut-off events. [2021-12-17 23:31:18,876 INFO L130 PetriNetUnfolder]: For 70675/70675 co-relation queries the response was YES. [2021-12-17 23:31:18,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17390 conditions, 1742 events. 549/1742 cut-off events. For 70675/70675 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 12783 event pairs, 40 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 17122. Up to 1264 conditions per place. [2021-12-17 23:31:18,915 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 691 selfloop transitions, 88 changer transitions 26/844 dead transitions. [2021-12-17 23:31:18,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 844 transitions, 16565 flow [2021-12-17 23:31:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:31:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:31:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1595 transitions. [2021-12-17 23:31:18,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656028368794326 [2021-12-17 23:31:18,917 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1595 transitions. [2021-12-17 23:31:18,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1595 transitions. [2021-12-17 23:31:18,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:18,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1595 transitions. [2021-12-17 23:31:18,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.166666666666664) internal successors, (1595), 30 states have internal predecessors, (1595), 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 23:31:18,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:31:18,920 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:31:18,920 INFO L186 Difference]: Start difference. First operand has 730 places, 821 transitions, 14787 flow. Second operand 30 states and 1595 transitions. [2021-12-17 23:31:18,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 844 transitions, 16565 flow [2021-12-17 23:31:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 844 transitions, 15833 flow, removed 149 selfloop flow, removed 43 redundant places. [2021-12-17 23:31:19,518 INFO L242 Difference]: Finished difference. Result has 700 places, 803 transitions, 13948 flow [2021-12-17 23:31:19,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=14063, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13948, PETRI_PLACES=700, PETRI_TRANSITIONS=803} [2021-12-17 23:31:19,518 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 612 predicate places. [2021-12-17 23:31:19,518 INFO L470 AbstractCegarLoop]: Abstraction has has 700 places, 803 transitions, 13948 flow [2021-12-17 23:31:19,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:19,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:19,519 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] [2021-12-17 23:31:19,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-12-17 23:31:19,519 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -687497040, now seen corresponding path program 261 times [2021-12-17 23:31:19,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:19,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779599056] [2021-12-17 23:31:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:19,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:19,801 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 23:31:19,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779599056] [2021-12-17 23:31:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779599056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:19,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:31:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793634255] [2021-12-17 23:31:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:31:19,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:31:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:31:19,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:19,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 803 transitions, 13948 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:19,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:19,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:19,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:21,538 INFO L129 PetriNetUnfolder]: 543/1711 cut-off events. [2021-12-17 23:31:21,538 INFO L130 PetriNetUnfolder]: For 66587/66587 co-relation queries the response was YES. [2021-12-17 23:31:21,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16816 conditions, 1711 events. 543/1711 cut-off events. For 66587/66587 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12426 event pairs, 44 based on Foata normal form. 1/1709 useless extension candidates. Maximal degree in co-relation 16559. Up to 1263 conditions per place. [2021-12-17 23:31:21,568 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 682 selfloop transitions, 66 changer transitions 33/820 dead transitions. [2021-12-17 23:31:21,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 820 transitions, 15632 flow [2021-12-17 23:31:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 23:31:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 23:31:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1678 transitions. [2021-12-17 23:31:21,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.557845744680851 [2021-12-17 23:31:21,569 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1678 transitions. [2021-12-17 23:31:21,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1678 transitions. [2021-12-17 23:31:21,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:21,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1678 transitions. [2021-12-17 23:31:21,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.4375) internal successors, (1678), 32 states have internal predecessors, (1678), 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 23:31:21,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:31:21,572 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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 23:31:21,572 INFO L186 Difference]: Start difference. First operand has 700 places, 803 transitions, 13948 flow. Second operand 32 states and 1678 transitions. [2021-12-17 23:31:21,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 820 transitions, 15632 flow [2021-12-17 23:31:22,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 820 transitions, 15286 flow, removed 27 selfloop flow, removed 33 redundant places. [2021-12-17 23:31:22,102 INFO L242 Difference]: Finished difference. Result has 684 places, 777 transitions, 13336 flow [2021-12-17 23:31:22,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=13610, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13336, PETRI_PLACES=684, PETRI_TRANSITIONS=777} [2021-12-17 23:31:22,103 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 596 predicate places. [2021-12-17 23:31:22,103 INFO L470 AbstractCegarLoop]: Abstraction has has 684 places, 777 transitions, 13336 flow [2021-12-17 23:31:22,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:22,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:22,103 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] [2021-12-17 23:31:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-12-17 23:31:22,103 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1930897336, now seen corresponding path program 262 times [2021-12-17 23:31:22,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369464235] [2021-12-17 23:31:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:22,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:22,357 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 23:31:22,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369464235] [2021-12-17 23:31:22,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369464235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:22,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:22,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-17 23:31:22,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510660923] [2021-12-17 23:31:22,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:22,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:31:22,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:31:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:31:22,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:22,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 777 transitions, 13336 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:31:22,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:22,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:22,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:23,665 INFO L129 PetriNetUnfolder]: 539/1681 cut-off events. [2021-12-17 23:31:23,665 INFO L130 PetriNetUnfolder]: For 67436/67436 co-relation queries the response was YES. [2021-12-17 23:31:23,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16402 conditions, 1681 events. 539/1681 cut-off events. For 67436/67436 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12062 event pairs, 41 based on Foata normal form. 1/1679 useless extension candidates. Maximal degree in co-relation 16152. Up to 1181 conditions per place. [2021-12-17 23:31:23,703 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 632 selfloop transitions, 76 changer transitions 57/804 dead transitions. [2021-12-17 23:31:23,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 804 transitions, 15057 flow [2021-12-17 23:31:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 23:31:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-17 23:31:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1599 transitions. [2021-12-17 23:31:23,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5670212765957446 [2021-12-17 23:31:23,705 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1599 transitions. [2021-12-17 23:31:23,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1599 transitions. [2021-12-17 23:31:23,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:23,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1599 transitions. [2021-12-17 23:31:23,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.3) internal successors, (1599), 30 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:31:23,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:31:23,707 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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 23:31:23,707 INFO L186 Difference]: Start difference. First operand has 684 places, 777 transitions, 13336 flow. Second operand 30 states and 1599 transitions. [2021-12-17 23:31:23,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 804 transitions, 15057 flow [2021-12-17 23:31:24,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 804 transitions, 14606 flow, removed 45 selfloop flow, removed 45 redundant places. [2021-12-17 23:31:24,222 INFO L242 Difference]: Finished difference. Result has 644 places, 734 transitions, 12169 flow [2021-12-17 23:31:24,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=12893, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12169, PETRI_PLACES=644, PETRI_TRANSITIONS=734} [2021-12-17 23:31:24,222 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 556 predicate places. [2021-12-17 23:31:24,222 INFO L470 AbstractCegarLoop]: Abstraction has has 644 places, 734 transitions, 12169 flow [2021-12-17 23:31:24,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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 23:31:24,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:24,222 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] [2021-12-17 23:31:24,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-12-17 23:31:24,223 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1148727164, now seen corresponding path program 263 times [2021-12-17 23:31:24,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:24,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713920813] [2021-12-17 23:31:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:24,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:31:24,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:24,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713920813] [2021-12-17 23:31:24,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713920813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:24,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:24,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:31:24,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604094223] [2021-12-17 23:31:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:31:24,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:31:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:31:24,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:24,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 734 transitions, 12169 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:31:24,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:24,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:24,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:27,565 INFO L129 PetriNetUnfolder]: 528/1624 cut-off events. [2021-12-17 23:31:27,566 INFO L130 PetriNetUnfolder]: For 67087/67087 co-relation queries the response was YES. [2021-12-17 23:31:27,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15925 conditions, 1624 events. 528/1624 cut-off events. For 67087/67087 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11436 event pairs, 40 based on Foata normal form. 1/1623 useless extension candidates. Maximal degree in co-relation 15690. Up to 1053 conditions per place. [2021-12-17 23:31:27,598 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 549 selfloop transitions, 179 changer transitions 20/787 dead transitions. [2021-12-17 23:31:27,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 787 transitions, 15191 flow [2021-12-17 23:31:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:31:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-17 23:31:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2311 transitions. [2021-12-17 23:31:27,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558752417794971 [2021-12-17 23:31:27,599 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2311 transitions. [2021-12-17 23:31:27,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2311 transitions. [2021-12-17 23:31:27,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:27,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2311 transitions. [2021-12-17 23:31:27,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.52272727272727) internal successors, (2311), 44 states have internal predecessors, (2311), 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 23:31:27,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:31:27,603 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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 23:31:27,603 INFO L186 Difference]: Start difference. First operand has 644 places, 734 transitions, 12169 flow. Second operand 44 states and 2311 transitions. [2021-12-17 23:31:27,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 787 transitions, 15191 flow [2021-12-17 23:31:28,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 787 transitions, 14629 flow, removed 131 selfloop flow, removed 35 redundant places. [2021-12-17 23:31:28,109 INFO L242 Difference]: Finished difference. Result has 642 places, 743 transitions, 12451 flow [2021-12-17 23:31:28,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11641, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=12451, PETRI_PLACES=642, PETRI_TRANSITIONS=743} [2021-12-17 23:31:28,109 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 554 predicate places. [2021-12-17 23:31:28,109 INFO L470 AbstractCegarLoop]: Abstraction has has 642 places, 743 transitions, 12451 flow [2021-12-17 23:31:28,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:31:28,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:28,110 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] [2021-12-17 23:31:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-12-17 23:31:28,110 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1646109818, now seen corresponding path program 264 times [2021-12-17 23:31:28,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350513131] [2021-12-17 23:31:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:28,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:28,407 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 23:31:28,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350513131] [2021-12-17 23:31:28,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350513131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:28,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:28,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 23:31:28,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949898110] [2021-12-17 23:31:28,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:28,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:31:28,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:31:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:31:28,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:28,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 743 transitions, 12451 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:31:28,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:28,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:28,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:31,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:31:32,850 INFO L129 PetriNetUnfolder]: 523/1612 cut-off events. [2021-12-17 23:31:32,850 INFO L130 PetriNetUnfolder]: For 63924/63924 co-relation queries the response was YES. [2021-12-17 23:31:32,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 1612 events. 523/1612 cut-off events. For 63924/63924 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11307 event pairs, 43 based on Foata normal form. 1/1610 useless extension candidates. Maximal degree in co-relation 15413. Up to 1064 conditions per place. [2021-12-17 23:31:32,881 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 569 selfloop transitions, 146 changer transitions 21/775 dead transitions. [2021-12-17 23:31:32,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 775 transitions, 14530 flow [2021-12-17 23:31:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 23:31:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-17 23:31:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2359 transitions. [2021-12-17 23:31:32,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5576832151300236 [2021-12-17 23:31:32,882 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2359 transitions. [2021-12-17 23:31:32,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2359 transitions. [2021-12-17 23:31:32,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:32,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2359 transitions. [2021-12-17 23:31:32,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 52.422222222222224) internal successors, (2359), 45 states have internal predecessors, (2359), 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 23:31:32,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:31:32,886 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 94.0) internal successors, (4324), 46 states have internal predecessors, (4324), 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 23:31:32,886 INFO L186 Difference]: Start difference. First operand has 642 places, 743 transitions, 12451 flow. Second operand 45 states and 2359 transitions. [2021-12-17 23:31:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 775 transitions, 14530 flow [2021-12-17 23:31:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 775 transitions, 13881 flow, removed 204 selfloop flow, removed 33 redundant places. [2021-12-17 23:31:33,379 INFO L242 Difference]: Finished difference. Result has 655 places, 736 transitions, 12111 flow [2021-12-17 23:31:33,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11858, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=12111, PETRI_PLACES=655, PETRI_TRANSITIONS=736} [2021-12-17 23:31:33,379 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 567 predicate places. [2021-12-17 23:31:33,379 INFO L470 AbstractCegarLoop]: Abstraction has has 655 places, 736 transitions, 12111 flow [2021-12-17 23:31:33,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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 23:31:33,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:33,380 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] [2021-12-17 23:31:33,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-12-17 23:31:33,380 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1295180618, now seen corresponding path program 265 times [2021-12-17 23:31:33,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:33,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672429652] [2021-12-17 23:31:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:33,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:33,670 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 23:31:33,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672429652] [2021-12-17 23:31:33,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672429652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:33,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:33,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:33,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314057584] [2021-12-17 23:31:33,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:33,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:33,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:33,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:33,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:33,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 736 transitions, 12111 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:33,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:33,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:33,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:35,061 INFO L129 PetriNetUnfolder]: 521/1611 cut-off events. [2021-12-17 23:31:35,061 INFO L130 PetriNetUnfolder]: For 60090/60090 co-relation queries the response was YES. [2021-12-17 23:31:35,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15401 conditions, 1611 events. 521/1611 cut-off events. For 60090/60090 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11333 event pairs, 44 based on Foata normal form. 1/1609 useless extension candidates. Maximal degree in co-relation 15166. Up to 1136 conditions per place. [2021-12-17 23:31:35,093 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 598 selfloop transitions, 114 changer transitions 20/771 dead transitions. [2021-12-17 23:31:35,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 771 transitions, 14185 flow [2021-12-17 23:31:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:31:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:31:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2003 transitions. [2021-12-17 23:31:35,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607502799552072 [2021-12-17 23:31:35,094 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2003 transitions. [2021-12-17 23:31:35,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2003 transitions. [2021-12-17 23:31:35,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:35,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2003 transitions. [2021-12-17 23:31:35,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.71052631578947) internal successors, (2003), 38 states have internal predecessors, (2003), 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 23:31:35,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:31:35,098 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:31:35,098 INFO L186 Difference]: Start difference. First operand has 655 places, 736 transitions, 12111 flow. Second operand 38 states and 2003 transitions. [2021-12-17 23:31:35,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 771 transitions, 14185 flow [2021-12-17 23:31:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 771 transitions, 13861 flow, removed 25 selfloop flow, removed 41 redundant places. [2021-12-17 23:31:35,540 INFO L242 Difference]: Finished difference. Result has 645 places, 735 transitions, 12213 flow [2021-12-17 23:31:35,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11797, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12213, PETRI_PLACES=645, PETRI_TRANSITIONS=735} [2021-12-17 23:31:35,541 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 557 predicate places. [2021-12-17 23:31:35,541 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 735 transitions, 12213 flow [2021-12-17 23:31:35,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:35,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:35,541 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] [2021-12-17 23:31:35,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-12-17 23:31:35,541 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:35,541 INFO L85 PathProgramCache]: Analyzing trace with hash 384423620, now seen corresponding path program 266 times [2021-12-17 23:31:35,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:35,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876231901] [2021-12-17 23:31:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:35,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:35,816 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 23:31:35,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876231901] [2021-12-17 23:31:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876231901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:35,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:31:35,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142080785] [2021-12-17 23:31:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:35,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:31:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:31:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:31:35,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:35,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 735 transitions, 12213 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:35,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:35,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:35,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:37,678 INFO L129 PetriNetUnfolder]: 515/1591 cut-off events. [2021-12-17 23:31:37,678 INFO L130 PetriNetUnfolder]: For 58558/58558 co-relation queries the response was YES. [2021-12-17 23:31:37,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15222 conditions, 1591 events. 515/1591 cut-off events. For 58558/58558 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11140 event pairs, 46 based on Foata normal form. 1/1589 useless extension candidates. Maximal degree in co-relation 14991. Up to 1122 conditions per place. [2021-12-17 23:31:37,710 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 593 selfloop transitions, 97 changer transitions 35/764 dead transitions. [2021-12-17 23:31:37,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 764 transitions, 14059 flow [2021-12-17 23:31:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 23:31:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-17 23:31:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1998 transitions. [2021-12-17 23:31:37,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5593505039193729 [2021-12-17 23:31:37,711 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1998 transitions. [2021-12-17 23:31:37,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1998 transitions. [2021-12-17 23:31:37,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:37,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1998 transitions. [2021-12-17 23:31:37,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 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 23:31:37,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:31:37,715 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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 23:31:37,715 INFO L186 Difference]: Start difference. First operand has 645 places, 735 transitions, 12213 flow. Second operand 38 states and 1998 transitions. [2021-12-17 23:31:37,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 764 transitions, 14059 flow [2021-12-17 23:31:38,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 764 transitions, 13561 flow, removed 133 selfloop flow, removed 33 redundant places. [2021-12-17 23:31:38,179 INFO L242 Difference]: Finished difference. Result has 649 places, 713 transitions, 11686 flow [2021-12-17 23:31:38,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11726, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11686, PETRI_PLACES=649, PETRI_TRANSITIONS=713} [2021-12-17 23:31:38,180 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 561 predicate places. [2021-12-17 23:31:38,180 INFO L470 AbstractCegarLoop]: Abstraction has has 649 places, 713 transitions, 11686 flow [2021-12-17 23:31:38,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:38,180 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:38,180 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] [2021-12-17 23:31:38,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-12-17 23:31:38,180 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1297306876, now seen corresponding path program 267 times [2021-12-17 23:31:38,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:38,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86056325] [2021-12-17 23:31:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:38,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:38,467 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 23:31:38,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86056325] [2021-12-17 23:31:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86056325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:38,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:31:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809865752] [2021-12-17 23:31:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:38,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:31:38,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:31:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:31:38,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:38,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 713 transitions, 11686 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:38,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:38,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:38,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:41,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:31:42,048 INFO L129 PetriNetUnfolder]: 503/1566 cut-off events. [2021-12-17 23:31:42,049 INFO L130 PetriNetUnfolder]: For 58024/58024 co-relation queries the response was YES. [2021-12-17 23:31:42,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14994 conditions, 1566 events. 503/1566 cut-off events. For 58024/58024 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10917 event pairs, 45 based on Foata normal form. 1/1564 useless extension candidates. Maximal degree in co-relation 14761. Up to 1105 conditions per place. [2021-12-17 23:31:42,080 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 580 selfloop transitions, 108 changer transitions 18/745 dead transitions. [2021-12-17 23:31:42,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 745 transitions, 13690 flow [2021-12-17 23:31:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:31:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-17 23:31:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2156 transitions. [2021-12-17 23:31:42,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5594187856772185 [2021-12-17 23:31:42,081 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2156 transitions. [2021-12-17 23:31:42,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2156 transitions. [2021-12-17 23:31:42,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:42,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2156 transitions. [2021-12-17 23:31:42,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.58536585365854) internal successors, (2156), 41 states have internal predecessors, (2156), 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 23:31:42,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:31:42,085 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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 23:31:42,085 INFO L186 Difference]: Start difference. First operand has 649 places, 713 transitions, 11686 flow. Second operand 41 states and 2156 transitions. [2021-12-17 23:31:42,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 745 transitions, 13690 flow [2021-12-17 23:31:42,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 745 transitions, 13295 flow, removed 62 selfloop flow, removed 45 redundant places. [2021-12-17 23:31:42,531 INFO L242 Difference]: Finished difference. Result has 639 places, 712 transitions, 11741 flow [2021-12-17 23:31:42,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11322, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11741, PETRI_PLACES=639, PETRI_TRANSITIONS=712} [2021-12-17 23:31:42,532 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 551 predicate places. [2021-12-17 23:31:42,532 INFO L470 AbstractCegarLoop]: Abstraction has has 639 places, 712 transitions, 11741 flow [2021-12-17 23:31:42,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:42,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:42,532 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] [2021-12-17 23:31:42,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-12-17 23:31:42,532 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1375643970, now seen corresponding path program 268 times [2021-12-17 23:31:42,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855954717] [2021-12-17 23:31:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:42,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:42,819 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 23:31:42,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855954717] [2021-12-17 23:31:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855954717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:42,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:42,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394052651] [2021-12-17 23:31:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:42,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:42,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 712 transitions, 11741 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:42,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:42,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:42,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:44,588 INFO L129 PetriNetUnfolder]: 497/1531 cut-off events. [2021-12-17 23:31:44,588 INFO L130 PetriNetUnfolder]: For 55157/55157 co-relation queries the response was YES. [2021-12-17 23:31:44,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14703 conditions, 1531 events. 497/1531 cut-off events. For 55157/55157 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10534 event pairs, 46 based on Foata normal form. 1/1529 useless extension candidates. Maximal degree in co-relation 14475. Up to 1099 conditions per place. [2021-12-17 23:31:44,619 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 579 selfloop transitions, 98 changer transitions 18/734 dead transitions. [2021-12-17 23:31:44,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 734 transitions, 13278 flow [2021-12-17 23:31:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:31:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:31:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1749 transitions. [2021-12-17 23:31:44,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2021-12-17 23:31:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1749 transitions. [2021-12-17 23:31:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1749 transitions. [2021-12-17 23:31:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:44,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1749 transitions. [2021-12-17 23:31:44,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.0) internal successors, (1749), 33 states have internal predecessors, (1749), 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 23:31:44,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:44,623 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:44,623 INFO L186 Difference]: Start difference. First operand has 639 places, 712 transitions, 11741 flow. Second operand 33 states and 1749 transitions. [2021-12-17 23:31:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 734 transitions, 13278 flow [2021-12-17 23:31:45,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 734 transitions, 12822 flow, removed 115 selfloop flow, removed 36 redundant places. [2021-12-17 23:31:45,036 INFO L242 Difference]: Finished difference. Result has 634 places, 701 transitions, 11407 flow [2021-12-17 23:31:45,037 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11289, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11407, PETRI_PLACES=634, PETRI_TRANSITIONS=701} [2021-12-17 23:31:45,037 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 546 predicate places. [2021-12-17 23:31:45,037 INFO L470 AbstractCegarLoop]: Abstraction has has 634 places, 701 transitions, 11407 flow [2021-12-17 23:31:45,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:45,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:45,037 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] [2021-12-17 23:31:45,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-12-17 23:31:45,037 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash 923995360, now seen corresponding path program 269 times [2021-12-17 23:31:45,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:45,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486412424] [2021-12-17 23:31:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:45,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:45,298 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 23:31:45,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486412424] [2021-12-17 23:31:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486412424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:45,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:45,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:45,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133021468] [2021-12-17 23:31:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:45,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:45,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:45,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:45,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:45,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 701 transitions, 11407 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:45,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:45,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:45,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:46,705 INFO L129 PetriNetUnfolder]: 492/1520 cut-off events. [2021-12-17 23:31:46,705 INFO L130 PetriNetUnfolder]: For 53393/53393 co-relation queries the response was YES. [2021-12-17 23:31:46,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14465 conditions, 1520 events. 492/1520 cut-off events. For 53393/53393 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10420 event pairs, 48 based on Foata normal form. 1/1518 useless extension candidates. Maximal degree in co-relation 14239. Up to 1096 conditions per place. [2021-12-17 23:31:46,736 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 569 selfloop transitions, 83 changer transitions 30/721 dead transitions. [2021-12-17 23:31:46,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 721 transitions, 12909 flow [2021-12-17 23:31:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:31:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 23:31:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1792 transitions. [2021-12-17 23:31:46,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607008760951189 [2021-12-17 23:31:46,737 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1792 transitions. [2021-12-17 23:31:46,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1792 transitions. [2021-12-17 23:31:46,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:46,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1792 transitions. [2021-12-17 23:31:46,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.705882352941174) internal successors, (1792), 34 states have internal predecessors, (1792), 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 23:31:46,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:31:46,740 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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 23:31:46,740 INFO L186 Difference]: Start difference. First operand has 634 places, 701 transitions, 11407 flow. Second operand 34 states and 1792 transitions. [2021-12-17 23:31:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 721 transitions, 12909 flow [2021-12-17 23:31:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 721 transitions, 12640 flow, removed 17 selfloop flow, removed 32 redundant places. [2021-12-17 23:31:47,154 INFO L242 Difference]: Finished difference. Result has 627 places, 678 transitions, 11098 flow [2021-12-17 23:31:47,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=11144, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11098, PETRI_PLACES=627, PETRI_TRANSITIONS=678} [2021-12-17 23:31:47,155 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 539 predicate places. [2021-12-17 23:31:47,155 INFO L470 AbstractCegarLoop]: Abstraction has has 627 places, 678 transitions, 11098 flow [2021-12-17 23:31:47,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:47,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:47,155 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] [2021-12-17 23:31:47,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-12-17 23:31:47,155 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash 747339906, now seen corresponding path program 270 times [2021-12-17 23:31:47,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361114390] [2021-12-17 23:31:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:47,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:47,433 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 23:31:47,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361114390] [2021-12-17 23:31:47,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361114390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:47,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:47,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-17 23:31:47,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267017830] [2021-12-17 23:31:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:47,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:31:47,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:31:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:47,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:47,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 678 transitions, 11098 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:47,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:47,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:47,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:48,775 INFO L129 PetriNetUnfolder]: 488/1500 cut-off events. [2021-12-17 23:31:48,775 INFO L130 PetriNetUnfolder]: For 53714/53714 co-relation queries the response was YES. [2021-12-17 23:31:48,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14295 conditions, 1500 events. 488/1500 cut-off events. For 53714/53714 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10252 event pairs, 43 based on Foata normal form. 1/1498 useless extension candidates. Maximal degree in co-relation 14072. Up to 1085 conditions per place. [2021-12-17 23:31:48,805 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 563 selfloop transitions, 79 changer transitions 26/707 dead transitions. [2021-12-17 23:31:48,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 707 transitions, 12641 flow [2021-12-17 23:31:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 23:31:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-17 23:31:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-12-17 23:31:48,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-12-17 23:31:48,807 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-12-17 23:31:48,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-12-17 23:31:48,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:48,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-12-17 23:31:48,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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 23:31:48,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:48,810 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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 23:31:48,810 INFO L186 Difference]: Start difference. First operand has 627 places, 678 transitions, 11098 flow. Second operand 33 states and 1745 transitions. [2021-12-17 23:31:48,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 707 transitions, 12641 flow [2021-12-17 23:31:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 707 transitions, 12266 flow, removed 19 selfloop flow, removed 44 redundant places. [2021-12-17 23:31:49,200 INFO L242 Difference]: Finished difference. Result has 604 places, 668 transitions, 10836 flow [2021-12-17 23:31:49,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10734, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10836, PETRI_PLACES=604, PETRI_TRANSITIONS=668} [2021-12-17 23:31:49,201 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 516 predicate places. [2021-12-17 23:31:49,201 INFO L470 AbstractCegarLoop]: Abstraction has has 604 places, 668 transitions, 10836 flow [2021-12-17 23:31:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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 23:31:49,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:49,201 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] [2021-12-17 23:31:49,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-12-17 23:31:49,202 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1763984412, now seen corresponding path program 271 times [2021-12-17 23:31:49,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830081451] [2021-12-17 23:31:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:49,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:49,512 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 23:31:49,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:49,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830081451] [2021-12-17 23:31:49,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830081451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:49,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:49,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:31:49,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385350592] [2021-12-17 23:31:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:49,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:31:49,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:31:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:31:49,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:49,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 668 transitions, 10836 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:49,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:49,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:49,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:53,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 23:31:54,186 INFO L129 PetriNetUnfolder]: 508/1540 cut-off events. [2021-12-17 23:31:54,186 INFO L130 PetriNetUnfolder]: For 53863/53863 co-relation queries the response was YES. [2021-12-17 23:31:54,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14943 conditions, 1540 events. 508/1540 cut-off events. For 53863/53863 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10548 event pairs, 49 based on Foata normal form. 1/1537 useless extension candidates. Maximal degree in co-relation 14724. Up to 1039 conditions per place. [2021-12-17 23:31:54,220 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 514 selfloop transitions, 159 changer transitions 28/740 dead transitions. [2021-12-17 23:31:54,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 740 transitions, 13803 flow [2021-12-17 23:31:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:31:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 23:31:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2211 transitions. [2021-12-17 23:31:54,222 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5600303951367781 [2021-12-17 23:31:54,222 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2211 transitions. [2021-12-17 23:31:54,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2211 transitions. [2021-12-17 23:31:54,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:54,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2211 transitions. [2021-12-17 23:31:54,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.642857142857146) internal successors, (2211), 42 states have internal predecessors, (2211), 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 23:31:54,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:31:54,226 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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 23:31:54,226 INFO L186 Difference]: Start difference. First operand has 604 places, 668 transitions, 10836 flow. Second operand 42 states and 2211 transitions. [2021-12-17 23:31:54,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 740 transitions, 13803 flow [2021-12-17 23:31:54,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 740 transitions, 13546 flow, removed 14 selfloop flow, removed 35 redundant places. [2021-12-17 23:31:54,650 INFO L242 Difference]: Finished difference. Result has 606 places, 696 transitions, 11712 flow [2021-12-17 23:31:54,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=10585, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11712, PETRI_PLACES=606, PETRI_TRANSITIONS=696} [2021-12-17 23:31:54,651 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 518 predicate places. [2021-12-17 23:31:54,651 INFO L470 AbstractCegarLoop]: Abstraction has has 606 places, 696 transitions, 11712 flow [2021-12-17 23:31:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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 23:31:54,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:31:54,651 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] [2021-12-17 23:31:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-12-17 23:31:54,651 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:31:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -698015292, now seen corresponding path program 272 times [2021-12-17 23:31:54,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:31:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801075662] [2021-12-17 23:31:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:31:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:31:54,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:31:54,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801075662] [2021-12-17 23:31:54,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801075662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:54,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:54,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-17 23:31:54,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100074802] [2021-12-17 23:31:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:54,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:31:54,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:31:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:31:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:31:54,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-17 23:31:54,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 696 transitions, 11712 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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 23:31:54,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:31:54,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-17 23:31:54,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:31:56,278 INFO L129 PetriNetUnfolder]: 491/1513 cut-off events. [2021-12-17 23:31:56,278 INFO L130 PetriNetUnfolder]: For 53366/53366 co-relation queries the response was YES. [2021-12-17 23:31:56,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14717 conditions, 1513 events. 491/1513 cut-off events. For 53366/53366 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10372 event pairs, 48 based on Foata normal form. 1/1511 useless extension candidates. Maximal degree in co-relation 14496. Up to 1116 conditions per place. [2021-12-17 23:31:56,306 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 588 selfloop transitions, 73 changer transitions 18/718 dead transitions. [2021-12-17 23:31:56,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 718 transitions, 13208 flow [2021-12-17 23:31:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:31:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:31:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1632 transitions. [2021-12-17 23:31:56,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5600549073438572 [2021-12-17 23:31:56,307 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1632 transitions. [2021-12-17 23:31:56,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1632 transitions. [2021-12-17 23:31:56,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:31:56,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1632 transitions. [2021-12-17 23:31:56,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.645161290322584) internal successors, (1632), 31 states have internal predecessors, (1632), 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 23:31:56,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:31:56,310 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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 23:31:56,310 INFO L186 Difference]: Start difference. First operand has 606 places, 696 transitions, 11712 flow. Second operand 31 states and 1632 transitions. [2021-12-17 23:31:56,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 718 transitions, 13208 flow Killed by 15