/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:44:45,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:44:45,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:44:45,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:44:45,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:44:45,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:44:45,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:44:45,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:44:45,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:44:45,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:44:45,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:44:45,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:44:45,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:44:45,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:44:45,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:44:45,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:44:45,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:44:45,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:44:45,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:44:45,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:44:45,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:44:45,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:44:45,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:44:45,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:44:45,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:44:45,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:44:45,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:44:45,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:44:45,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:44:45,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:44:45,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:44:45,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:44:45,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:44:45,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:44:45,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:44:45,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:44:45,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:44:45,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:44:45,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:44:45,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:44:45,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:44:45,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 08:44:45,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:44:45,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:44:45,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:44:45,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:44:45,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:44:45,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:44:45,185 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:44:45,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:44:45,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:44:45,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:44:45,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:44:45,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:44:45,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:44:45,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:44:45,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:44:45,188 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:44:45,188 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:44:45,188 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:44:45,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:44:45,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:44:45,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:44:45,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:44:45,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:44:45,369 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:44:45,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 08:44:45,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb87aaee/0e3893a6bb5e4626acb963f0c78214ac/FLAG48d31e52c [2022-01-19 08:44:45,734 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:44:45,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 08:44:45,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb87aaee/0e3893a6bb5e4626acb963f0c78214ac/FLAG48d31e52c [2022-01-19 08:44:45,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb87aaee/0e3893a6bb5e4626acb963f0c78214ac [2022-01-19 08:44:45,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:44:45,751 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:44:45,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:44:45,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:44:45,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:44:45,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fffd7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45, skipping insertion in model container [2022-01-19 08:44:45,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:44:45,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:44:45,902 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-01-19 08:44:45,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:44:45,911 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:44:45,931 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-01-19 08:44:45,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:44:45,946 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:44:45,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45 WrapperNode [2022-01-19 08:44:45,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:44:45,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:44:45,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:44:45,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:44:45,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,968 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-01-19 08:44:45,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:44:45,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:44:45,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:44:45,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:44:45,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:45,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:44:45,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:44:45,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:44:45,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:44:45,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (1/1) ... [2022-01-19 08:44:46,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:44:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:46,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 08:44:46,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:44:46,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:44:46,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:44:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:44:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:44:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:44:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:44:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:44:46,069 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:44:46,113 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:44:46,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:44:46,257 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:44:46,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:44:46,291 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 08:44:46,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:44:46 BoogieIcfgContainer [2022-01-19 08:44:46,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:44:46,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:44:46,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:44:46,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:44:46,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:44:45" (1/3) ... [2022-01-19 08:44:46,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f031974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:44:46, skipping insertion in model container [2022-01-19 08:44:46,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:44:45" (2/3) ... [2022-01-19 08:44:46,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f031974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:44:46, skipping insertion in model container [2022-01-19 08:44:46,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:44:46" (3/3) ... [2022-01-19 08:44:46,298 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-01-19 08:44:46,301 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:44:46,301 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:44:46,301 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:44:46,324 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,325 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,325 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,325 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,325 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,325 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,328 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,329 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,330 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,332 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,333 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,334 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:44:46,336 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:44:46,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:44:46,383 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=false, 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 [2022-01-19 08:44:46,383 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:44:46,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-01-19 08:44:46,421 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2022-01-19 08:44:46,421 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:44:46,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-01-19 08:44:46,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-01-19 08:44:46,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-01-19 08:44:46,442 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-01-19 08:44:46,442 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:44:46,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:46,446 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:44:46,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2022-01-19 08:44:46,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079573500] [2022-01-19 08:44:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:46,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:46,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079573500] [2022-01-19 08:44:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079573500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:44:46,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:44:46,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:44:46,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801857323] [2022-01-19 08:44:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:44:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:44:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:44:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:44:46,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-01-19 08:44:46,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:46,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:46,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-01-19 08:44:46,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:46,740 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-01-19 08:44:46,740 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-01-19 08:44:46,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-01-19 08:44:46,746 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-01-19 08:44:46,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-01-19 08:44:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:44:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:44:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-01-19 08:44:46,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-01-19 08:44:46,758 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-01-19 08:44:46,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-01-19 08:44:46,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:46,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-01-19 08:44:46,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:46,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:46,772 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:46,787 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-01-19 08:44:46,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-01-19 08:44:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:44:46,795 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-01-19 08:44:46,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-01-19 08:44:46,801 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-01-19 08:44:46,801 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-01-19 08:44:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:46,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:46,801 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] [2022-01-19 08:44:46,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:44:46,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2022-01-19 08:44:46,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162101994] [2022-01-19 08:44:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:46,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:46,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162101994] [2022-01-19 08:44:46,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162101994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:44:46,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:44:46,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:44:46,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37384998] [2022-01-19 08:44:47,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:44:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:44:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:44:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:44:47,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-01-19 08:44:47,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:47,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-01-19 08:44:47,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:47,085 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2022-01-19 08:44:47,085 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-01-19 08:44:47,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2022-01-19 08:44:47,088 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2022-01-19 08:44:47,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2022-01-19 08:44:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:44:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:44:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-01-19 08:44:47,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-01-19 08:44:47,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-01-19 08:44:47,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-01-19 08:44:47,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:47,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-01-19 08:44:47,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,099 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,099 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2022-01-19 08:44:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2022-01-19 08:44:47,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:44:47,102 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-01-19 08:44:47,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-01-19 08:44:47,103 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-01-19 08:44:47,103 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-01-19 08:44:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:47,104 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] [2022-01-19 08:44:47,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:44:47,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:47,105 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2022-01-19 08:44:47,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:47,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536433872] [2022-01-19 08:44:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:47,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:47,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536433872] [2022-01-19 08:44:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536433872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686870672] [2022-01-19 08:44:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:47,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:47,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:44:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:44:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686870672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:47,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:47,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-19 08:44:47,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434846842] [2022-01-19 08:44:47,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:47,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 08:44:47,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 08:44:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-19 08:44:47,622 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-01-19 08:44:47,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:47,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-01-19 08:44:47,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:47,666 INFO L129 PetriNetUnfolder]: 27/138 cut-off events. [2022-01-19 08:44:47,666 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-01-19 08:44:47,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 138 events. 27/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 5 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2022-01-19 08:44:47,667 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 19 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2022-01-19 08:44:47,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 254 flow [2022-01-19 08:44:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:44:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:44:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2022-01-19 08:44:47,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441860465116279 [2022-01-19 08:44:47,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2022-01-19 08:44:47,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2022-01-19 08:44:47,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:47,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2022-01-19 08:44:47,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,671 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,671 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 5 states and 363 transitions. [2022-01-19 08:44:47,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 254 flow [2022-01-19 08:44:47,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:44:47,673 INFO L242 Difference]: Finished difference. Result has 81 places, 76 transitions, 212 flow [2022-01-19 08:44:47,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2022-01-19 08:44:47,674 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2022-01-19 08:44:47,674 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 212 flow [2022-01-19 08:44:47,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:47,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:47,674 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:44:47,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 08:44:47,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:47,888 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1484029817, now seen corresponding path program 1 times [2022-01-19 08:44:47,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:47,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380530913] [2022-01-19 08:44:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:47,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:48,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380530913] [2022-01-19 08:44:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380530913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698380852] [2022-01-19 08:44:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:48,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:48,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:48,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:44:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:44:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:49,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698380852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:49,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:49,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:44:49,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233431037] [2022-01-19 08:44:49,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:49,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:44:49,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:44:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:44:49,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:44:49,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 212 flow. Second operand has 33 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) [2022-01-19 08:44:49,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:49,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:44:49,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:50,753 INFO L129 PetriNetUnfolder]: 260/787 cut-off events. [2022-01-19 08:44:50,753 INFO L130 PetriNetUnfolder]: For 564/572 co-relation queries the response was YES. [2022-01-19 08:44:50,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 787 events. 260/787 cut-off events. For 564/572 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4626 event pairs, 6 based on Foata normal form. 7/754 useless extension candidates. Maximal degree in co-relation 2076. Up to 143 conditions per place. [2022-01-19 08:44:50,761 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 112 selfloop transitions, 121 changer transitions 53/327 dead transitions. [2022-01-19 08:44:50,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 327 transitions, 1946 flow [2022-01-19 08:44:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 08:44:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 08:44:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2022-01-19 08:44:50,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2022-01-19 08:44:50,795 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2022-01-19 08:44:50,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2022-01-19 08:44:50,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:50,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2022-01-19 08:44:50,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:50,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:50,808 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:50,808 INFO L186 Difference]: Start difference. First operand has 81 places, 76 transitions, 212 flow. Second operand 57 states and 3152 transitions. [2022-01-19 08:44:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 327 transitions, 1946 flow [2022-01-19 08:44:50,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 327 transitions, 1946 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:44:50,815 INFO L242 Difference]: Finished difference. Result has 168 places, 203 transitions, 1379 flow [2022-01-19 08:44:50,815 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1379, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2022-01-19 08:44:50,820 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-01-19 08:44:50,820 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1379 flow [2022-01-19 08:44:50,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:44:50,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:50,821 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] [2022-01-19 08:44:50,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:44:51,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-19 08:44:51,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1760521617, now seen corresponding path program 2 times [2022-01-19 08:44:51,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:51,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058558049] [2022-01-19 08:44:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:51,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:51,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:51,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058558049] [2022-01-19 08:44:51,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058558049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:51,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684872294] [2022-01-19 08:44:51,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:44:51,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:51,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:51,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:51,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:44:51,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:44:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:44:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:44:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:51,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:52,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684872294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:52,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:52,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:44:52,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933407278] [2022-01-19 08:44:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:44:52,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:44:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:44:52,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:44:52,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1379 flow. Second operand has 33 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) [2022-01-19 08:44:52,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:52,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:44:52,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:54,469 INFO L129 PetriNetUnfolder]: 347/1098 cut-off events. [2022-01-19 08:44:54,470 INFO L130 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2022-01-19 08:44:54,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1098 events. 347/1098 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7229 event pairs, 15 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4224. Up to 224 conditions per place. [2022-01-19 08:44:54,479 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 136 selfloop transitions, 230 changer transitions 34/441 dead transitions. [2022-01-19 08:44:54,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 441 transitions, 4005 flow [2022-01-19 08:44:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 08:44:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 08:44:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4115 transitions. [2022-01-19 08:44:54,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.637984496124031 [2022-01-19 08:44:54,488 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4115 transitions. [2022-01-19 08:44:54,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4115 transitions. [2022-01-19 08:44:54,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:54,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4115 transitions. [2022-01-19 08:44:54,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 54.86666666666667) internal successors, (4115), 75 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:54,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:54,505 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:54,505 INFO L186 Difference]: Start difference. First operand has 168 places, 203 transitions, 1379 flow. Second operand 75 states and 4115 transitions. [2022-01-19 08:44:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 441 transitions, 4005 flow [2022-01-19 08:44:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 3689 flow, removed 158 selfloop flow, removed 14 redundant places. [2022-01-19 08:44:54,534 INFO L242 Difference]: Finished difference. Result has 230 places, 332 transitions, 3004 flow [2022-01-19 08:44:54,535 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3004, PETRI_PLACES=230, PETRI_TRANSITIONS=332} [2022-01-19 08:44:54,537 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 154 predicate places. [2022-01-19 08:44:54,537 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 332 transitions, 3004 flow [2022-01-19 08:44:54,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:44:54,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:54,537 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:44:54,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:44:54,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:54,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1200502709, now seen corresponding path program 3 times [2022-01-19 08:44:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089631313] [2022-01-19 08:44:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:54,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:54,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089631313] [2022-01-19 08:44:54,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089631313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177202411] [2022-01-19 08:44:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:44:54,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:54,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:54,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:44:55,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:44:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:44:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:44:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:55,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177202411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:55,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:55,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:44:55,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284940876] [2022-01-19 08:44:55,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:55,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:44:55,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:44:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:44:55,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:44:55,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 332 transitions, 3004 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:55,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:55,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:44:55,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:44:57,920 INFO L129 PetriNetUnfolder]: 544/1748 cut-off events. [2022-01-19 08:44:57,920 INFO L130 PetriNetUnfolder]: For 7138/7157 co-relation queries the response was YES. [2022-01-19 08:44:57,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1748 events. 544/1748 cut-off events. For 7138/7157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13271 event pairs, 31 based on Foata normal form. 9/1751 useless extension candidates. Maximal degree in co-relation 7890. Up to 483 conditions per place. [2022-01-19 08:44:57,937 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 255 selfloop transitions, 331 changer transitions 37/664 dead transitions. [2022-01-19 08:44:57,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 664 transitions, 7611 flow [2022-01-19 08:44:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 08:44:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 08:44:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3363 transitions. [2022-01-19 08:44:57,941 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410598551277163 [2022-01-19 08:44:57,941 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3363 transitions. [2022-01-19 08:44:57,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3363 transitions. [2022-01-19 08:44:57,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:44:57,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3363 transitions. [2022-01-19 08:44:57,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.131147540983605) internal successors, (3363), 61 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:57,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:57,952 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:57,952 INFO L186 Difference]: Start difference. First operand has 230 places, 332 transitions, 3004 flow. Second operand 61 states and 3363 transitions. [2022-01-19 08:44:57,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 664 transitions, 7611 flow [2022-01-19 08:44:57,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 664 transitions, 7140 flow, removed 138 selfloop flow, removed 20 redundant places. [2022-01-19 08:44:58,001 INFO L242 Difference]: Finished difference. Result has 299 places, 542 transitions, 6409 flow [2022-01-19 08:44:58,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6409, PETRI_PLACES=299, PETRI_TRANSITIONS=542} [2022-01-19 08:44:58,002 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 223 predicate places. [2022-01-19 08:44:58,002 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 542 transitions, 6409 flow [2022-01-19 08:44:58,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:58,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:44:58,003 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:44:58,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 08:44:58,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:58,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:44:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:44:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash -596230533, now seen corresponding path program 4 times [2022-01-19 08:44:58,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:44:58,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465863887] [2022-01-19 08:44:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:44:58,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:44:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:44:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:58,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:44:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465863887] [2022-01-19 08:44:58,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465863887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:44:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178909267] [2022-01-19 08:44:58,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:44:58,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:44:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:44:58,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:44:58,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:44:58,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:44:58,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:44:58,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:44:58,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:44:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:58,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:44:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:44:59,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178909267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:44:59,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:44:59,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:44:59,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993432179] [2022-01-19 08:44:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:44:59,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:44:59,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:44:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:44:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:44:59,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:44:59,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 542 transitions, 6409 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:44:59,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:44:59,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:44:59,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:01,696 INFO L129 PetriNetUnfolder]: 757/2442 cut-off events. [2022-01-19 08:45:01,696 INFO L130 PetriNetUnfolder]: For 18516/18567 co-relation queries the response was YES. [2022-01-19 08:45:01,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 2442 events. 757/2442 cut-off events. For 18516/18567 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20302 event pairs, 59 based on Foata normal form. 11/2447 useless extension candidates. Maximal degree in co-relation 13254. Up to 786 conditions per place. [2022-01-19 08:45:01,723 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 342 selfloop transitions, 462 changer transitions 48/893 dead transitions. [2022-01-19 08:45:01,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 893 transitions, 12607 flow [2022-01-19 08:45:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 08:45:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 08:45:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3585 transitions. [2022-01-19 08:45:01,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413237924865832 [2022-01-19 08:45:01,727 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3585 transitions. [2022-01-19 08:45:01,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3585 transitions. [2022-01-19 08:45:01,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:01,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3585 transitions. [2022-01-19 08:45:01,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.15384615384615) internal successors, (3585), 65 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:01,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:01,741 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:01,741 INFO L186 Difference]: Start difference. First operand has 299 places, 542 transitions, 6409 flow. Second operand 65 states and 3585 transitions. [2022-01-19 08:45:01,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 893 transitions, 12607 flow [2022-01-19 08:45:01,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 893 transitions, 12293 flow, removed 152 selfloop flow, removed 9 redundant places. [2022-01-19 08:45:01,859 INFO L242 Difference]: Finished difference. Result has 387 places, 757 transitions, 11210 flow [2022-01-19 08:45:01,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11210, PETRI_PLACES=387, PETRI_TRANSITIONS=757} [2022-01-19 08:45:01,860 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 311 predicate places. [2022-01-19 08:45:01,861 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 757 transitions, 11210 flow [2022-01-19 08:45:01,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:01,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:01,871 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] [2022-01-19 08:45:01,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 08:45:02,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:02,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:02,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1699910441, now seen corresponding path program 5 times [2022-01-19 08:45:02,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:02,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179808828] [2022-01-19 08:45:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:02,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:02,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179808828] [2022-01-19 08:45:02,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179808828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678169436] [2022-01-19 08:45:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:45:02,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:02,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:45:02,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:02,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:03,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678169436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:03,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:03,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:03,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313896900] [2022-01-19 08:45:03,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:03,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:03,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:03,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:03,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 757 transitions, 11210 flow. Second operand has 33 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) [2022-01-19 08:45:03,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:03,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:03,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:06,010 INFO L129 PetriNetUnfolder]: 792/2558 cut-off events. [2022-01-19 08:45:06,010 INFO L130 PetriNetUnfolder]: For 32950/32974 co-relation queries the response was YES. [2022-01-19 08:45:06,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 2558 events. 792/2558 cut-off events. For 32950/32974 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21500 event pairs, 25 based on Foata normal form. 7/2563 useless extension candidates. Maximal degree in co-relation 16564. Up to 504 conditions per place. [2022-01-19 08:45:06,047 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 232 selfloop transitions, 633 changer transitions 38/944 dead transitions. [2022-01-19 08:45:06,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 944 transitions, 15762 flow [2022-01-19 08:45:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-19 08:45:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-01-19 08:45:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2022-01-19 08:45:06,055 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2022-01-19 08:45:06,056 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2022-01-19 08:45:06,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2022-01-19 08:45:06,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:06,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2022-01-19 08:45:06,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:06,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:06,069 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:06,069 INFO L186 Difference]: Start difference. First operand has 387 places, 757 transitions, 11210 flow. Second operand 76 states and 4176 transitions. [2022-01-19 08:45:06,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 944 transitions, 15762 flow [2022-01-19 08:45:06,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 944 transitions, 15182 flow, removed 285 selfloop flow, removed 8 redundant places. [2022-01-19 08:45:06,313 INFO L242 Difference]: Finished difference. Result has 456 places, 822 transitions, 13352 flow [2022-01-19 08:45:06,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=13352, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2022-01-19 08:45:06,316 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 380 predicate places. [2022-01-19 08:45:06,316 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 13352 flow [2022-01-19 08:45:06,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:06,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:06,317 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] [2022-01-19 08:45:06,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:06,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:06,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash 351983375, now seen corresponding path program 6 times [2022-01-19 08:45:06,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:06,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373507490] [2022-01-19 08:45:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:06,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:06,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373507490] [2022-01-19 08:45:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373507490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764400963] [2022-01-19 08:45:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:45:06,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:06,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:06,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:45:06,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:45:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:07,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764400963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:07,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:07,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:45:07,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823443710] [2022-01-19 08:45:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:07,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:45:07,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:45:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:45:07,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:07,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 13352 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:07,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:07,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:07,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:10,139 INFO L129 PetriNetUnfolder]: 907/3024 cut-off events. [2022-01-19 08:45:10,139 INFO L130 PetriNetUnfolder]: For 48445/48480 co-relation queries the response was YES. [2022-01-19 08:45:10,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3024 events. 907/3024 cut-off events. For 48445/48480 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26809 event pairs, 100 based on Foata normal form. 5/3019 useless extension candidates. Maximal degree in co-relation 20828. Up to 1057 conditions per place. [2022-01-19 08:45:10,186 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 421 selfloop transitions, 567 changer transitions 50/1079 dead transitions. [2022-01-19 08:45:10,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1079 transitions, 19817 flow [2022-01-19 08:45:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 08:45:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 08:45:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3529 transitions. [2022-01-19 08:45:10,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6411700581395349 [2022-01-19 08:45:10,190 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3529 transitions. [2022-01-19 08:45:10,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3529 transitions. [2022-01-19 08:45:10,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:10,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3529 transitions. [2022-01-19 08:45:10,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.140625) internal successors, (3529), 64 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:10,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:10,199 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:10,199 INFO L186 Difference]: Start difference. First operand has 456 places, 822 transitions, 13352 flow. Second operand 64 states and 3529 transitions. [2022-01-19 08:45:10,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1079 transitions, 19817 flow [2022-01-19 08:45:10,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1079 transitions, 18789 flow, removed 174 selfloop flow, removed 40 redundant places. [2022-01-19 08:45:10,524 INFO L242 Difference]: Finished difference. Result has 497 places, 944 transitions, 17074 flow [2022-01-19 08:45:10,525 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17074, PETRI_PLACES=497, PETRI_TRANSITIONS=944} [2022-01-19 08:45:10,526 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 421 predicate places. [2022-01-19 08:45:10,526 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 944 transitions, 17074 flow [2022-01-19 08:45:10,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:10,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:10,526 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:10,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:10,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:10,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -381220039, now seen corresponding path program 7 times [2022-01-19 08:45:10,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498674893] [2022-01-19 08:45:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:10,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:10,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498674893] [2022-01-19 08:45:10,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498674893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043776921] [2022-01-19 08:45:10,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:45:10,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:10,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:10,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:10,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:45:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:10,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:11,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043776921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:11,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:11,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:11,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984062046] [2022-01-19 08:45:11,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:11,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:11,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:11,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:11,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 944 transitions, 17074 flow. Second operand has 33 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) [2022-01-19 08:45:11,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:11,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:11,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:15,301 INFO L129 PetriNetUnfolder]: 1130/3900 cut-off events. [2022-01-19 08:45:15,301 INFO L130 PetriNetUnfolder]: For 95550/95585 co-relation queries the response was YES. [2022-01-19 08:45:15,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 3900 events. 1130/3900 cut-off events. For 95550/95585 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37369 event pairs, 45 based on Foata normal form. 14/3910 useless extension candidates. Maximal degree in co-relation 29750. Up to 766 conditions per place. [2022-01-19 08:45:15,358 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 446 selfloop transitions, 830 changer transitions 31/1348 dead transitions. [2022-01-19 08:45:15,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1348 transitions, 27580 flow [2022-01-19 08:45:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-19 08:45:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-01-19 08:45:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4259 transitions. [2022-01-19 08:45:15,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431591664149804 [2022-01-19 08:45:15,362 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4259 transitions. [2022-01-19 08:45:15,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4259 transitions. [2022-01-19 08:45:15,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:15,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4259 transitions. [2022-01-19 08:45:15,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.311688311688314) internal successors, (4259), 77 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:15,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:15,373 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:15,373 INFO L186 Difference]: Start difference. First operand has 497 places, 944 transitions, 17074 flow. Second operand 77 states and 4259 transitions. [2022-01-19 08:45:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1348 transitions, 27580 flow [2022-01-19 08:45:15,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1348 transitions, 26329 flow, removed 525 selfloop flow, removed 28 redundant places. [2022-01-19 08:45:16,009 INFO L242 Difference]: Finished difference. Result has 562 places, 1159 transitions, 23296 flow [2022-01-19 08:45:16,010 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16312, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=23296, PETRI_PLACES=562, PETRI_TRANSITIONS=1159} [2022-01-19 08:45:16,011 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 486 predicate places. [2022-01-19 08:45:16,011 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1159 transitions, 23296 flow [2022-01-19 08:45:16,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:16,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:16,012 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] [2022-01-19 08:45:16,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:16,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 08:45:16,213 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1766817381, now seen corresponding path program 8 times [2022-01-19 08:45:16,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230823340] [2022-01-19 08:45:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:16,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:16,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230823340] [2022-01-19 08:45:16,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230823340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572750745] [2022-01-19 08:45:16,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:45:16,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:16,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:16,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:45:16,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:16,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:17,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572750745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:17,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:17,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:17,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533056220] [2022-01-19 08:45:17,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:17,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:17,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:17,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:17,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1159 transitions, 23296 flow. Second operand has 33 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) [2022-01-19 08:45:17,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:17,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:17,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:20,926 INFO L129 PetriNetUnfolder]: 1131/3759 cut-off events. [2022-01-19 08:45:20,926 INFO L130 PetriNetUnfolder]: For 115420/115455 co-relation queries the response was YES. [2022-01-19 08:45:20,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 3759 events. 1131/3759 cut-off events. For 115420/115455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35156 event pairs, 68 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 31500. Up to 766 conditions per place. [2022-01-19 08:45:20,979 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 325 selfloop transitions, 876 changer transitions 46/1288 dead transitions. [2022-01-19 08:45:20,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1288 transitions, 27966 flow [2022-01-19 08:45:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 08:45:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 08:45:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4384 transitions. [2022-01-19 08:45:20,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-01-19 08:45:20,983 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4384 transitions. [2022-01-19 08:45:20,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4384 transitions. [2022-01-19 08:45:20,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:20,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4384 transitions. [2022-01-19 08:45:20,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.8) internal successors, (4384), 80 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:20,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:20,994 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:20,994 INFO L186 Difference]: Start difference. First operand has 562 places, 1159 transitions, 23296 flow. Second operand 80 states and 4384 transitions. [2022-01-19 08:45:20,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1288 transitions, 27966 flow [2022-01-19 08:45:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1288 transitions, 26972 flow, removed 325 selfloop flow, removed 32 redundant places. [2022-01-19 08:45:21,749 INFO L242 Difference]: Finished difference. Result has 610 places, 1153 transitions, 24222 flow [2022-01-19 08:45:21,750 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=24222, PETRI_PLACES=610, PETRI_TRANSITIONS=1153} [2022-01-19 08:45:21,751 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 534 predicate places. [2022-01-19 08:45:21,751 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 1153 transitions, 24222 flow [2022-01-19 08:45:21,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:21,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:21,751 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:21,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:21,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1296723879, now seen corresponding path program 9 times [2022-01-19 08:45:21,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:21,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243038438] [2022-01-19 08:45:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:21,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:22,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243038438] [2022-01-19 08:45:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243038438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577844651] [2022-01-19 08:45:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:45:22,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:22,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:22,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:45:22,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:45:22,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:22,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:22,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577844651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:22,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:22,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:22,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662509750] [2022-01-19 08:45:22,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:22,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:22,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:22,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:22,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1153 transitions, 24222 flow. Second operand has 33 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) [2022-01-19 08:45:22,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:22,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:22,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:25,970 INFO L129 PetriNetUnfolder]: 1389/4472 cut-off events. [2022-01-19 08:45:25,970 INFO L130 PetriNetUnfolder]: For 142331/142366 co-relation queries the response was YES. [2022-01-19 08:45:26,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39489 conditions, 4472 events. 1389/4472 cut-off events. For 142331/142366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43173 event pairs, 96 based on Foata normal form. 8/4464 useless extension candidates. Maximal degree in co-relation 39351. Up to 1427 conditions per place. [2022-01-19 08:45:26,036 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 450 selfloop transitions, 1094 changer transitions 23/1608 dead transitions. [2022-01-19 08:45:26,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1608 transitions, 37635 flow [2022-01-19 08:45:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 08:45:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 08:45:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2022-01-19 08:45:26,039 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2022-01-19 08:45:26,039 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2022-01-19 08:45:26,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2022-01-19 08:45:26,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:26,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2022-01-19 08:45:26,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:26,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:26,047 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:26,047 INFO L186 Difference]: Start difference. First operand has 610 places, 1153 transitions, 24222 flow. Second operand 58 states and 3184 transitions. [2022-01-19 08:45:26,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1608 transitions, 37635 flow [2022-01-19 08:45:26,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1608 transitions, 35381 flow, removed 57 selfloop flow, removed 69 redundant places. [2022-01-19 08:45:26,984 INFO L242 Difference]: Finished difference. Result has 600 places, 1498 transitions, 34421 flow [2022-01-19 08:45:26,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22585, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34421, PETRI_PLACES=600, PETRI_TRANSITIONS=1498} [2022-01-19 08:45:26,986 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 524 predicate places. [2022-01-19 08:45:26,986 INFO L470 AbstractCegarLoop]: Abstraction has has 600 places, 1498 transitions, 34421 flow [2022-01-19 08:45:26,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:26,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:26,987 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] [2022-01-19 08:45:27,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:27,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 08:45:27,188 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 10 times [2022-01-19 08:45:27,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793056731] [2022-01-19 08:45:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:27,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:27,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793056731] [2022-01-19 08:45:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793056731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196161946] [2022-01-19 08:45:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:45:27,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:27,357 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:27,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:45:27,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:45:27,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:27,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:27,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196161946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:28,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:28,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771690232] [2022-01-19 08:45:28,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:28,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:28,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:28,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:28,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1498 transitions, 34421 flow. Second operand has 33 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) [2022-01-19 08:45:28,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:28,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:28,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:32,439 INFO L129 PetriNetUnfolder]: 1542/5029 cut-off events. [2022-01-19 08:45:32,439 INFO L130 PetriNetUnfolder]: For 177983/178018 co-relation queries the response was YES. [2022-01-19 08:45:32,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45724 conditions, 5029 events. 1542/5029 cut-off events. For 177983/178018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50386 event pairs, 118 based on Foata normal form. 8/5019 useless extension candidates. Maximal degree in co-relation 45577. Up to 1425 conditions per place. [2022-01-19 08:45:32,516 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 426 selfloop transitions, 1299 changer transitions 53/1819 dead transitions. [2022-01-19 08:45:32,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1819 transitions, 45250 flow [2022-01-19 08:45:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 08:45:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 08:45:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3752 transitions. [2022-01-19 08:45:32,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2022-01-19 08:45:32,519 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3752 transitions. [2022-01-19 08:45:32,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3752 transitions. [2022-01-19 08:45:32,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:32,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3752 transitions. [2022-01-19 08:45:32,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.1764705882353) internal successors, (3752), 68 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,528 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:32,528 INFO L186 Difference]: Start difference. First operand has 600 places, 1498 transitions, 34421 flow. Second operand 68 states and 3752 transitions. [2022-01-19 08:45:32,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1819 transitions, 45250 flow [2022-01-19 08:45:34,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1819 transitions, 44072 flow, removed 409 selfloop flow, removed 21 redundant places. [2022-01-19 08:45:34,082 INFO L242 Difference]: Finished difference. Result has 662 places, 1680 transitions, 41710 flow [2022-01-19 08:45:34,084 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33397, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=41710, PETRI_PLACES=662, PETRI_TRANSITIONS=1680} [2022-01-19 08:45:34,085 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 586 predicate places. [2022-01-19 08:45:34,085 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 1680 transitions, 41710 flow [2022-01-19 08:45:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:34,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:34,086 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:34,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:34,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 08:45:34,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -815631631, now seen corresponding path program 11 times [2022-01-19 08:45:34,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684030412] [2022-01-19 08:45:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:34,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:34,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684030412] [2022-01-19 08:45:34,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684030412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973345119] [2022-01-19 08:45:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:45:34,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:34,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:34,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:45:34,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:34,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973345119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:35,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:35,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:35,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667910552] [2022-01-19 08:45:35,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:35,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:35,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:35,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:35,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1680 transitions, 41710 flow. Second operand has 33 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) [2022-01-19 08:45:35,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:35,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:35,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:39,105 INFO L129 PetriNetUnfolder]: 1479/4684 cut-off events. [2022-01-19 08:45:39,105 INFO L130 PetriNetUnfolder]: For 177210/177234 co-relation queries the response was YES. [2022-01-19 08:45:39,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 4684 events. 1479/4684 cut-off events. For 177210/177234 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45371 event pairs, 101 based on Foata normal form. 7/4685 useless extension candidates. Maximal degree in co-relation 44739. Up to 1349 conditions per place. [2022-01-19 08:45:39,299 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 543 selfloop transitions, 1161 changer transitions 26/1771 dead transitions. [2022-01-19 08:45:39,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1771 transitions, 46862 flow [2022-01-19 08:45:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-19 08:45:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-01-19 08:45:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3405 transitions. [2022-01-19 08:45:39,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6385971492873218 [2022-01-19 08:45:39,302 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3405 transitions. [2022-01-19 08:45:39,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3405 transitions. [2022-01-19 08:45:39,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:39,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3405 transitions. [2022-01-19 08:45:39,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.91935483870968) internal successors, (3405), 62 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,310 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:39,310 INFO L186 Difference]: Start difference. First operand has 662 places, 1680 transitions, 41710 flow. Second operand 62 states and 3405 transitions. [2022-01-19 08:45:39,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1771 transitions, 46862 flow [2022-01-19 08:45:40,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1771 transitions, 45530 flow, removed 278 selfloop flow, removed 37 redundant places. [2022-01-19 08:45:40,918 INFO L242 Difference]: Finished difference. Result has 690 places, 1692 transitions, 43205 flow [2022-01-19 08:45:40,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=43205, PETRI_PLACES=690, PETRI_TRANSITIONS=1692} [2022-01-19 08:45:40,920 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 614 predicate places. [2022-01-19 08:45:40,920 INFO L470 AbstractCegarLoop]: Abstraction has has 690 places, 1692 transitions, 43205 flow [2022-01-19 08:45:40,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:40,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:40,920 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] [2022-01-19 08:45:40,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:41,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 08:45:41,124 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 12 times [2022-01-19 08:45:41,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:41,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140789591] [2022-01-19 08:45:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:41,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:41,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140789591] [2022-01-19 08:45:41,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140789591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704117311] [2022-01-19 08:45:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:45:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:41,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:41,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 08:45:41,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:45:41,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:41,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:42,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704117311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:42,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:42,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:42,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888320692] [2022-01-19 08:45:42,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:42,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:42,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:42,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:42,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1692 transitions, 43205 flow. Second operand has 33 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) [2022-01-19 08:45:42,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:42,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:42,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:45,456 INFO L129 PetriNetUnfolder]: 1561/4845 cut-off events. [2022-01-19 08:45:45,456 INFO L130 PetriNetUnfolder]: For 189682/189706 co-relation queries the response was YES. [2022-01-19 08:45:45,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48552 conditions, 4845 events. 1561/4845 cut-off events. For 189682/189706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 46770 event pairs, 116 based on Foata normal form. 5/4837 useless extension candidates. Maximal degree in co-relation 48390. Up to 2011 conditions per place. [2022-01-19 08:45:45,529 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 754 selfloop transitions, 1114 changer transitions 14/1923 dead transitions. [2022-01-19 08:45:45,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1923 transitions, 52668 flow [2022-01-19 08:45:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 08:45:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 08:45:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2022-01-19 08:45:45,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2022-01-19 08:45:45,531 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2022-01-19 08:45:45,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2022-01-19 08:45:45,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:45,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2022-01-19 08:45:45,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 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) [2022-01-19 08:45:45,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:45,535 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:45,535 INFO L186 Difference]: Start difference. First operand has 690 places, 1692 transitions, 43205 flow. Second operand 40 states and 2211 transitions. [2022-01-19 08:45:45,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1923 transitions, 52668 flow [2022-01-19 08:45:47,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 1923 transitions, 52017 flow, removed 82 selfloop flow, removed 30 redundant places. [2022-01-19 08:45:47,084 INFO L242 Difference]: Finished difference. Result has 708 places, 1847 transitions, 50811 flow [2022-01-19 08:45:47,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=42646, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=50811, PETRI_PLACES=708, PETRI_TRANSITIONS=1847} [2022-01-19 08:45:47,086 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2022-01-19 08:45:47,086 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 1847 transitions, 50811 flow [2022-01-19 08:45:47,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:47,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:47,086 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:47,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:47,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 08:45:47,294 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash 394267245, now seen corresponding path program 13 times [2022-01-19 08:45:47,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256855093] [2022-01-19 08:45:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:47,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:47,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:47,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256855093] [2022-01-19 08:45:47,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256855093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:47,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103733987] [2022-01-19 08:45:47,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:45:47,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:47,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:47,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 08:45:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:48,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103733987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:48,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319510855] [2022-01-19 08:45:48,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:48,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:48,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:48,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:48,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1847 transitions, 50811 flow. Second operand has 33 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) [2022-01-19 08:45:48,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:48,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:48,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:52,473 INFO L129 PetriNetUnfolder]: 1604/5007 cut-off events. [2022-01-19 08:45:52,474 INFO L130 PetriNetUnfolder]: For 206273/206301 co-relation queries the response was YES. [2022-01-19 08:45:52,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52641 conditions, 5007 events. 1604/5007 cut-off events. For 206273/206301 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 48902 event pairs, 125 based on Foata normal form. 6/4997 useless extension candidates. Maximal degree in co-relation 52472. Up to 1869 conditions per place. [2022-01-19 08:45:52,562 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 633 selfloop transitions, 1309 changer transitions 21/2004 dead transitions. [2022-01-19 08:45:52,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 2004 transitions, 58885 flow [2022-01-19 08:45:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 08:45:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 08:45:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2766 transitions. [2022-01-19 08:45:52,564 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6432558139534884 [2022-01-19 08:45:52,564 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2766 transitions. [2022-01-19 08:45:52,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2766 transitions. [2022-01-19 08:45:52,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:45:52,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2766 transitions. [2022-01-19 08:45:52,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.32) internal successors, (2766), 50 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:52,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:52,569 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:45:52,569 INFO L186 Difference]: Start difference. First operand has 708 places, 1847 transitions, 50811 flow. Second operand 50 states and 2766 transitions. [2022-01-19 08:45:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 2004 transitions, 58885 flow [2022-01-19 08:45:54,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 2004 transitions, 58597 flow, removed 129 selfloop flow, removed 8 redundant places. [2022-01-19 08:45:54,552 INFO L242 Difference]: Finished difference. Result has 759 places, 1905 transitions, 55617 flow [2022-01-19 08:45:54,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=50585, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=55617, PETRI_PLACES=759, PETRI_TRANSITIONS=1905} [2022-01-19 08:45:54,554 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 683 predicate places. [2022-01-19 08:45:54,554 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 1905 transitions, 55617 flow [2022-01-19 08:45:54,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:45:54,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:45:54,555 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:45:54,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 08:45:54,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:54,763 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:45:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:45:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1033346749, now seen corresponding path program 14 times [2022-01-19 08:45:54,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:45:54,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411831674] [2022-01-19 08:45:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:45:54,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:45:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:45:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:54,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:45:54,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411831674] [2022-01-19 08:45:54,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411831674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:45:54,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601387843] [2022-01-19 08:45:54,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:45:54,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:45:54,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:45:54,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:45:54,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 08:45:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:45:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:45:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:45:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:45:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:45:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:45:55,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601387843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:45:55,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:45:55,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:45:55,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125073975] [2022-01-19 08:45:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:45:55,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:45:55,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:45:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:45:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:45:55,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:45:55,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 1905 transitions, 55617 flow. Second operand has 33 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) [2022-01-19 08:45:55,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:45:55,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:45:55,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:45:59,959 INFO L129 PetriNetUnfolder]: 1642/5123 cut-off events. [2022-01-19 08:45:59,959 INFO L130 PetriNetUnfolder]: For 236579/236607 co-relation queries the response was YES. [2022-01-19 08:46:00,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57138 conditions, 5123 events. 1642/5123 cut-off events. For 236579/236607 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 50279 event pairs, 122 based on Foata normal form. 6/5112 useless extension candidates. Maximal degree in co-relation 56958. Up to 2003 conditions per place. [2022-01-19 08:46:00,064 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 679 selfloop transitions, 1414 changer transitions 19/2153 dead transitions. [2022-01-19 08:46:00,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 2153 transitions, 66549 flow [2022-01-19 08:46:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 08:46:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 08:46:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2806 transitions. [2022-01-19 08:46:00,067 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6397628818969449 [2022-01-19 08:46:00,067 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2806 transitions. [2022-01-19 08:46:00,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2806 transitions. [2022-01-19 08:46:00,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:00,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2806 transitions. [2022-01-19 08:46:00,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.01960784313726) internal successors, (2806), 51 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:00,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:00,072 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:00,072 INFO L186 Difference]: Start difference. First operand has 759 places, 1905 transitions, 55617 flow. Second operand 51 states and 2806 transitions. [2022-01-19 08:46:00,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 2153 transitions, 66549 flow [2022-01-19 08:46:02,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 772 places, 2153 transitions, 65360 flow, removed 170 selfloop flow, removed 34 redundant places. [2022-01-19 08:46:02,382 INFO L242 Difference]: Finished difference. Result has 790 places, 2055 transitions, 64059 flow [2022-01-19 08:46:02,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=54497, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=64059, PETRI_PLACES=790, PETRI_TRANSITIONS=2055} [2022-01-19 08:46:02,384 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 714 predicate places. [2022-01-19 08:46:02,384 INFO L470 AbstractCegarLoop]: Abstraction has has 790 places, 2055 transitions, 64059 flow [2022-01-19 08:46:02,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:46:02,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:02,384 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] [2022-01-19 08:46:02,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-19 08:46:02,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 08:46:02,585 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash -20529845, now seen corresponding path program 15 times [2022-01-19 08:46:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593526846] [2022-01-19 08:46:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:02,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:02,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593526846] [2022-01-19 08:46:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593526846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851938905] [2022-01-19 08:46:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:46:02,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:02,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:02,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:46:02,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:46:02,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:03,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851938905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:03,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:03,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:46:03,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055809563] [2022-01-19 08:46:03,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:03,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:46:03,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:03,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:46:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:46:03,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:03,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 2055 transitions, 64059 flow. Second operand has 33 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) [2022-01-19 08:46:03,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:03,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:03,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:08,070 INFO L129 PetriNetUnfolder]: 1642/5097 cut-off events. [2022-01-19 08:46:08,070 INFO L130 PetriNetUnfolder]: For 262727/262751 co-relation queries the response was YES. [2022-01-19 08:46:08,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 5097 events. 1642/5097 cut-off events. For 262727/262751 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49894 event pairs, 102 based on Foata normal form. 5/5090 useless extension candidates. Maximal degree in co-relation 59902. Up to 1811 conditions per place. [2022-01-19 08:46:08,182 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 877 selfloop transitions, 1207 changer transitions 17/2142 dead transitions. [2022-01-19 08:46:08,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 2142 transitions, 70246 flow [2022-01-19 08:46:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 08:46:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 08:46:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2693 transitions. [2022-01-19 08:46:08,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6390602752728999 [2022-01-19 08:46:08,184 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2693 transitions. [2022-01-19 08:46:08,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2693 transitions. [2022-01-19 08:46:08,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:08,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2693 transitions. [2022-01-19 08:46:08,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.95918367346939) internal successors, (2693), 49 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:08,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:08,189 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:08,189 INFO L186 Difference]: Start difference. First operand has 790 places, 2055 transitions, 64059 flow. Second operand 49 states and 2693 transitions. [2022-01-19 08:46:08,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 2142 transitions, 70246 flow [2022-01-19 08:46:11,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2142 transitions, 69462 flow, removed 172 selfloop flow, removed 19 redundant places. [2022-01-19 08:46:11,077 INFO L242 Difference]: Finished difference. Result has 821 places, 2059 transitions, 65992 flow [2022-01-19 08:46:11,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=63317, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=65992, PETRI_PLACES=821, PETRI_TRANSITIONS=2059} [2022-01-19 08:46:11,079 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 745 predicate places. [2022-01-19 08:46:11,079 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 2059 transitions, 65992 flow [2022-01-19 08:46:11,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:46:11,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:11,080 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:11,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:11,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 08:46:11,280 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1636260209, now seen corresponding path program 16 times [2022-01-19 08:46:11,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:11,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608738427] [2022-01-19 08:46:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:11,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:11,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608738427] [2022-01-19 08:46:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608738427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783254567] [2022-01-19 08:46:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:46:11,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:11,431 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:11,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:46:11,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:46:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:11,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783254567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:12,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:12,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:46:12,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224364867] [2022-01-19 08:46:12,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:12,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:46:12,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:46:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:46:12,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:12,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 2059 transitions, 65992 flow. Second operand has 33 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) [2022-01-19 08:46:12,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:12,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:12,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:17,431 INFO L129 PetriNetUnfolder]: 1636/5148 cut-off events. [2022-01-19 08:46:17,431 INFO L130 PetriNetUnfolder]: For 271632/271678 co-relation queries the response was YES. [2022-01-19 08:46:17,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61599 conditions, 5148 events. 1636/5148 cut-off events. For 271632/271678 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50801 event pairs, 117 based on Foata normal form. 10/5145 useless extension candidates. Maximal degree in co-relation 61403. Up to 1951 conditions per place. [2022-01-19 08:46:17,538 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 695 selfloop transitions, 1447 changer transitions 34/2217 dead transitions. [2022-01-19 08:46:17,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 872 places, 2217 transitions, 74598 flow [2022-01-19 08:46:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 08:46:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 08:46:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3151 transitions. [2022-01-19 08:46:17,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427988576091391 [2022-01-19 08:46:17,541 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3151 transitions. [2022-01-19 08:46:17,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3151 transitions. [2022-01-19 08:46:17,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:17,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3151 transitions. [2022-01-19 08:46:17,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.280701754385966) internal successors, (3151), 57 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:17,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:17,547 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:17,547 INFO L186 Difference]: Start difference. First operand has 821 places, 2059 transitions, 65992 flow. Second operand 57 states and 3151 transitions. [2022-01-19 08:46:17,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 872 places, 2217 transitions, 74598 flow [2022-01-19 08:46:20,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 839 places, 2217 transitions, 74057 flow, removed 49 selfloop flow, removed 33 redundant places. [2022-01-19 08:46:20,408 INFO L242 Difference]: Finished difference. Result has 858 places, 2092 transitions, 71898 flow [2022-01-19 08:46:20,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=65502, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=71898, PETRI_PLACES=858, PETRI_TRANSITIONS=2092} [2022-01-19 08:46:20,410 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 782 predicate places. [2022-01-19 08:46:20,410 INFO L470 AbstractCegarLoop]: Abstraction has has 858 places, 2092 transitions, 71898 flow [2022-01-19 08:46:20,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:46:20,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:20,410 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:20,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:20,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:20,623 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1095262929, now seen corresponding path program 17 times [2022-01-19 08:46:20,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115687240] [2022-01-19 08:46:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:20,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:20,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115687240] [2022-01-19 08:46:20,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115687240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344814168] [2022-01-19 08:46:20,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:46:20,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:20,780 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:20,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:46:20,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:46:20,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:20,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:21,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344814168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:21,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:21,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-19 08:46:21,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46181662] [2022-01-19 08:46:21,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:21,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 08:46:21,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 08:46:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 08:46:21,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:21,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2092 transitions, 71898 flow. Second operand has 33 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) [2022-01-19 08:46:21,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:21,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:21,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:26,114 INFO L129 PetriNetUnfolder]: 1611/4966 cut-off events. [2022-01-19 08:46:26,115 INFO L130 PetriNetUnfolder]: For 303280/303315 co-relation queries the response was YES. [2022-01-19 08:46:26,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64133 conditions, 4966 events. 1611/4966 cut-off events. For 303280/303315 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48049 event pairs, 122 based on Foata normal form. 9/4964 useless extension candidates. Maximal degree in co-relation 63927. Up to 1830 conditions per place. [2022-01-19 08:46:26,213 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 895 selfloop transitions, 1222 changer transitions 18/2176 dead transitions. [2022-01-19 08:46:26,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 2176 transitions, 78068 flow [2022-01-19 08:46:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-19 08:46:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-01-19 08:46:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2375 transitions. [2022-01-19 08:46:26,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6422390481341266 [2022-01-19 08:46:26,216 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2375 transitions. [2022-01-19 08:46:26,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2375 transitions. [2022-01-19 08:46:26,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:26,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2375 transitions. [2022-01-19 08:46:26,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.23255813953488) internal successors, (2375), 43 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:26,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:26,220 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:26,220 INFO L186 Difference]: Start difference. First operand has 858 places, 2092 transitions, 71898 flow. Second operand 43 states and 2375 transitions. [2022-01-19 08:46:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 2176 transitions, 78068 flow [2022-01-19 08:46:29,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 869 places, 2176 transitions, 77108 flow, removed 262 selfloop flow, removed 27 redundant places. [2022-01-19 08:46:29,193 INFO L242 Difference]: Finished difference. Result has 873 places, 2099 transitions, 73651 flow [2022-01-19 08:46:29,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=71012, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=73651, PETRI_PLACES=873, PETRI_TRANSITIONS=2099} [2022-01-19 08:46:29,195 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 797 predicate places. [2022-01-19 08:46:29,195 INFO L470 AbstractCegarLoop]: Abstraction has has 873 places, 2099 transitions, 73651 flow [2022-01-19 08:46:29,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-01-19 08:46:29,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:29,196 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] [2022-01-19 08:46:29,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:29,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:29,413 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1335362405, now seen corresponding path program 18 times [2022-01-19 08:46:29,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:29,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047763988] [2022-01-19 08:46:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:29,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:29,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047763988] [2022-01-19 08:46:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047763988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235789309] [2022-01-19 08:46:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:46:29,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:29,560 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:29,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 08:46:29,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:46:29,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:30,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235789309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:30,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:30,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:46:30,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86431898] [2022-01-19 08:46:30,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:30,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:46:30,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:46:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:46:30,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:30,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 2099 transitions, 73651 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:30,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:30,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:30,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:36,234 INFO L129 PetriNetUnfolder]: 1638/5072 cut-off events. [2022-01-19 08:46:36,234 INFO L130 PetriNetUnfolder]: For 318465/318489 co-relation queries the response was YES. [2022-01-19 08:46:36,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66629 conditions, 5072 events. 1638/5072 cut-off events. For 318465/318489 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 49496 event pairs, 87 based on Foata normal form. 8/5067 useless extension candidates. Maximal degree in co-relation 66425. Up to 1728 conditions per place. [2022-01-19 08:46:36,333 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 793 selfloop transitions, 1419 changer transitions 52/2305 dead transitions. [2022-01-19 08:46:36,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2305 transitions, 83942 flow [2022-01-19 08:46:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 08:46:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 08:46:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3582 transitions. [2022-01-19 08:46:36,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6407871198568873 [2022-01-19 08:46:36,335 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3582 transitions. [2022-01-19 08:46:36,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3582 transitions. [2022-01-19 08:46:36,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:36,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3582 transitions. [2022-01-19 08:46:36,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.10769230769231) internal successors, (3582), 65 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:36,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:36,341 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:36,341 INFO L186 Difference]: Start difference. First operand has 873 places, 2099 transitions, 73651 flow. Second operand 65 states and 3582 transitions. [2022-01-19 08:46:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2305 transitions, 83942 flow [2022-01-19 08:46:39,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 2305 transitions, 83246 flow, removed 130 selfloop flow, removed 26 redundant places. [2022-01-19 08:46:39,366 INFO L242 Difference]: Finished difference. Result has 920 places, 2126 transitions, 77443 flow [2022-01-19 08:46:39,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=73098, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=77443, PETRI_PLACES=920, PETRI_TRANSITIONS=2126} [2022-01-19 08:46:39,368 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 844 predicate places. [2022-01-19 08:46:39,368 INFO L470 AbstractCegarLoop]: Abstraction has has 920 places, 2126 transitions, 77443 flow [2022-01-19 08:46:39,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:39,369 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:39,369 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:39,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:39,569 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:39,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1138470815, now seen corresponding path program 19 times [2022-01-19 08:46:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995105971] [2022-01-19 08:46:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:39,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:39,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995105971] [2022-01-19 08:46:39,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995105971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914515115] [2022-01-19 08:46:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:46:39,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:39,761 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:39,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 08:46:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:40,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:40,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914515115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:40,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:40,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:46:40,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324344674] [2022-01-19 08:46:40,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:40,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:46:40,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:46:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:46:40,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:40,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 920 places, 2126 transitions, 77443 flow. Second operand has 31 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) [2022-01-19 08:46:40,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:40,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:40,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:48,026 INFO L129 PetriNetUnfolder]: 1839/5735 cut-off events. [2022-01-19 08:46:48,026 INFO L130 PetriNetUnfolder]: For 387373/387407 co-relation queries the response was YES. [2022-01-19 08:46:48,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78140 conditions, 5735 events. 1839/5735 cut-off events. For 387373/387407 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 57568 event pairs, 92 based on Foata normal form. 12/5730 useless extension candidates. Maximal degree in co-relation 77928. Up to 2331 conditions per place. [2022-01-19 08:46:48,159 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1045 selfloop transitions, 1548 changer transitions 37/2671 dead transitions. [2022-01-19 08:46:48,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 2671 transitions, 101201 flow [2022-01-19 08:46:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 08:46:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 08:46:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4075 transitions. [2022-01-19 08:46:48,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6403205531112508 [2022-01-19 08:46:48,162 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4075 transitions. [2022-01-19 08:46:48,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4075 transitions. [2022-01-19 08:46:48,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:48,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4075 transitions. [2022-01-19 08:46:48,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 55.067567567567565) internal successors, (4075), 74 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:48,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:48,170 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:48,170 INFO L186 Difference]: Start difference. First operand has 920 places, 2126 transitions, 77443 flow. Second operand 74 states and 4075 transitions. [2022-01-19 08:46:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 2671 transitions, 101201 flow [2022-01-19 08:46:52,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 2671 transitions, 98546 flow, removed 230 selfloop flow, removed 45 redundant places. [2022-01-19 08:46:52,388 INFO L242 Difference]: Finished difference. Result has 988 places, 2530 transitions, 97084 flow [2022-01-19 08:46:52,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75525, PETRI_DIFFERENCE_MINUEND_PLACES=863, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=97084, PETRI_PLACES=988, PETRI_TRANSITIONS=2530} [2022-01-19 08:46:52,391 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 912 predicate places. [2022-01-19 08:46:52,391 INFO L470 AbstractCegarLoop]: Abstraction has has 988 places, 2530 transitions, 97084 flow [2022-01-19 08:46:52,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 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) [2022-01-19 08:46:52,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:46:52,391 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:46:52,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 08:46:52,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-19 08:46:52,592 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:46:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:46:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1734421807, now seen corresponding path program 20 times [2022-01-19 08:46:52,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:46:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451965242] [2022-01-19 08:46:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:46:52,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:46:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:46:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:52,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:46:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451965242] [2022-01-19 08:46:52,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451965242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:46:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952790939] [2022-01-19 08:46:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:46:52,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:46:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:46:52,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:46:52,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 08:46:52,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:46:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:46:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:46:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:46:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:46:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:46:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952790939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:46:53,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:46:53,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:46:53,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326548993] [2022-01-19 08:46:53,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:46:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:46:53,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:46:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:46:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:46:53,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:46:53,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 2530 transitions, 97084 flow. Second operand has 31 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) [2022-01-19 08:46:53,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:46:53,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:46:53,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:46:59,033 INFO L129 PetriNetUnfolder]: 1868/5764 cut-off events. [2022-01-19 08:46:59,033 INFO L130 PetriNetUnfolder]: For 416492/416530 co-relation queries the response was YES. [2022-01-19 08:46:59,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82376 conditions, 5764 events. 1868/5764 cut-off events. For 416492/416530 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 57580 event pairs, 95 based on Foata normal form. 9/5756 useless extension candidates. Maximal degree in co-relation 82123. Up to 2548 conditions per place. [2022-01-19 08:46:59,180 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1197 selfloop transitions, 1418 changer transitions 20/2676 dead transitions. [2022-01-19 08:46:59,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 2676 transitions, 106917 flow [2022-01-19 08:46:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 08:46:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 08:46:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2054 transitions. [2022-01-19 08:46:59,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6455059710873664 [2022-01-19 08:46:59,185 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2054 transitions. [2022-01-19 08:46:59,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2054 transitions. [2022-01-19 08:46:59,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:46:59,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2054 transitions. [2022-01-19 08:46:59,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.513513513513516) internal successors, (2054), 37 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:59,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 86.0) internal successors, (3268), 38 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:59,188 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 86.0) internal successors, (3268), 38 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:46:59,188 INFO L186 Difference]: Start difference. First operand has 988 places, 2530 transitions, 97084 flow. Second operand 37 states and 2054 transitions. [2022-01-19 08:46:59,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 2676 transitions, 106917 flow [2022-01-19 08:47:04,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 2676 transitions, 104859 flow, removed 999 selfloop flow, removed 17 redundant places. [2022-01-19 08:47:04,315 INFO L242 Difference]: Finished difference. Result has 1013 places, 2577 transitions, 102801 flow [2022-01-19 08:47:04,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=95460, PETRI_DIFFERENCE_MINUEND_PLACES=961, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=102801, PETRI_PLACES=1013, PETRI_TRANSITIONS=2577} [2022-01-19 08:47:04,317 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 937 predicate places. [2022-01-19 08:47:04,317 INFO L470 AbstractCegarLoop]: Abstraction has has 1013 places, 2577 transitions, 102801 flow [2022-01-19 08:47:04,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 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) [2022-01-19 08:47:04,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:04,318 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:04,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 08:47:04,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 08:47:04,531 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 541108433, now seen corresponding path program 21 times [2022-01-19 08:47:04,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705331545] [2022-01-19 08:47:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:04,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:04,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705331545] [2022-01-19 08:47:04,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705331545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:04,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932588758] [2022-01-19 08:47:04,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:47:04,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:04,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:04,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 08:47:04,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:47:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:47:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:05,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932588758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:05,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:05,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:47:05,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075355582] [2022-01-19 08:47:05,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:05,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:47:05,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:47:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:47:05,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:47:05,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1013 places, 2577 transitions, 102801 flow. Second operand has 32 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) [2022-01-19 08:47:05,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:05,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:47:05,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:11,930 INFO L129 PetriNetUnfolder]: 1881/5772 cut-off events. [2022-01-19 08:47:11,930 INFO L130 PetriNetUnfolder]: For 428983/429003 co-relation queries the response was YES. [2022-01-19 08:47:12,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85154 conditions, 5772 events. 1881/5772 cut-off events. For 428983/429003 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 57528 event pairs, 94 based on Foata normal form. 5/5759 useless extension candidates. Maximal degree in co-relation 84895. Up to 2608 conditions per place. [2022-01-19 08:47:12,086 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 971 selfloop transitions, 1717 changer transitions 16/2745 dead transitions. [2022-01-19 08:47:12,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 2745 transitions, 113223 flow [2022-01-19 08:47:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 08:47:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 08:47:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2750 transitions. [2022-01-19 08:47:12,088 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-01-19 08:47:12,088 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2750 transitions. [2022-01-19 08:47:12,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2750 transitions. [2022-01-19 08:47:12,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:12,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2750 transitions. [2022-01-19 08:47:12,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.0) internal successors, (2750), 50 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:12,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:12,093 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 86.0) internal successors, (4386), 51 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:12,093 INFO L186 Difference]: Start difference. First operand has 1013 places, 2577 transitions, 102801 flow. Second operand 50 states and 2750 transitions. [2022-01-19 08:47:12,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 2745 transitions, 113223 flow [2022-01-19 08:47:17,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2745 transitions, 113030 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-01-19 08:47:17,226 INFO L242 Difference]: Finished difference. Result has 1060 places, 2660 transitions, 110510 flow [2022-01-19 08:47:17,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=102628, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=110510, PETRI_PLACES=1060, PETRI_TRANSITIONS=2660} [2022-01-19 08:47:17,228 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 984 predicate places. [2022-01-19 08:47:17,228 INFO L470 AbstractCegarLoop]: Abstraction has has 1060 places, 2660 transitions, 110510 flow [2022-01-19 08:47:17,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:47:17,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:17,228 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:17,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 08:47:17,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:17,429 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:17,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:17,429 INFO L85 PathProgramCache]: Analyzing trace with hash -62303967, now seen corresponding path program 22 times [2022-01-19 08:47:17,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:17,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299926959] [2022-01-19 08:47:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:17,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:17,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299926959] [2022-01-19 08:47:17,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299926959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387095823] [2022-01-19 08:47:17,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:47:17,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:17,671 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:17,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 08:47:17,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:47:17,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:47:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:18,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:18,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387095823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:18,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:18,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:47:18,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514377548] [2022-01-19 08:47:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:18,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:47:18,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:47:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:47:18,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:47:18,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1060 places, 2660 transitions, 110510 flow. Second operand has 32 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) [2022-01-19 08:47:18,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:18,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:47:18,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:25,520 INFO L129 PetriNetUnfolder]: 1920/5911 cut-off events. [2022-01-19 08:47:25,521 INFO L130 PetriNetUnfolder]: For 477462/477482 co-relation queries the response was YES. [2022-01-19 08:47:25,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90663 conditions, 5911 events. 1920/5911 cut-off events. For 477462/477482 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59399 event pairs, 95 based on Foata normal form. 5/5900 useless extension candidates. Maximal degree in co-relation 90392. Up to 2485 conditions per place. [2022-01-19 08:47:25,676 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 885 selfloop transitions, 1881 changer transitions 24/2831 dead transitions. [2022-01-19 08:47:25,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1114 places, 2831 transitions, 122063 flow [2022-01-19 08:47:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 08:47:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 08:47:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3201 transitions. [2022-01-19 08:47:25,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417401764234162 [2022-01-19 08:47:25,679 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3201 transitions. [2022-01-19 08:47:25,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3201 transitions. [2022-01-19 08:47:25,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:25,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3201 transitions. [2022-01-19 08:47:25,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.189655172413794) internal successors, (3201), 58 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:25,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:25,684 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:25,684 INFO L186 Difference]: Start difference. First operand has 1060 places, 2660 transitions, 110510 flow. Second operand 58 states and 3201 transitions. [2022-01-19 08:47:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1114 places, 2831 transitions, 122063 flow [2022-01-19 08:47:31,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 2831 transitions, 121648 flow, removed 169 selfloop flow, removed 15 redundant places. [2022-01-19 08:47:31,455 INFO L242 Difference]: Finished difference. Result has 1111 places, 2717 transitions, 117249 flow [2022-01-19 08:47:31,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=110113, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=117249, PETRI_PLACES=1111, PETRI_TRANSITIONS=2717} [2022-01-19 08:47:31,457 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1035 predicate places. [2022-01-19 08:47:31,457 INFO L470 AbstractCegarLoop]: Abstraction has has 1111 places, 2717 transitions, 117249 flow [2022-01-19 08:47:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:47:31,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:31,458 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:31,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 08:47:31,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:31,658 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:31,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1440863673, now seen corresponding path program 23 times [2022-01-19 08:47:31,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:31,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810706744] [2022-01-19 08:47:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:31,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:31,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810706744] [2022-01-19 08:47:31,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810706744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959869922] [2022-01-19 08:47:31,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:47:31,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:31,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:31,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 08:47:31,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:47:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:47:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:32,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959869922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:32,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:32,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:47:32,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384984175] [2022-01-19 08:47:32,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:47:32,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:47:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:47:32,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:47:32,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 2717 transitions, 117249 flow. Second operand has 31 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) [2022-01-19 08:47:32,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:32,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:47:32,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:39,433 INFO L129 PetriNetUnfolder]: 1908/5887 cut-off events. [2022-01-19 08:47:39,434 INFO L130 PetriNetUnfolder]: For 499260/499301 co-relation queries the response was YES. [2022-01-19 08:47:39,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92954 conditions, 5887 events. 1908/5887 cut-off events. For 499260/499301 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 59095 event pairs, 69 based on Foata normal form. 11/5883 useless extension candidates. Maximal degree in co-relation 92673. Up to 2596 conditions per place. [2022-01-19 08:47:39,581 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1236 selfloop transitions, 1495 changer transitions 12/2784 dead transitions. [2022-01-19 08:47:39,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1143 places, 2784 transitions, 124293 flow [2022-01-19 08:47:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 08:47:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 08:47:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1973 transitions. [2022-01-19 08:47:39,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372739018087855 [2022-01-19 08:47:39,583 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1973 transitions. [2022-01-19 08:47:39,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1973 transitions. [2022-01-19 08:47:39,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:39,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1973 transitions. [2022-01-19 08:47:39,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 54.80555555555556) internal successors, (1973), 36 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:39,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:39,586 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:39,586 INFO L186 Difference]: Start difference. First operand has 1111 places, 2717 transitions, 117249 flow. Second operand 36 states and 1973 transitions. [2022-01-19 08:47:39,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1143 places, 2784 transitions, 124293 flow [2022-01-19 08:47:45,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1104 places, 2784 transitions, 122506 flow, removed 268 selfloop flow, removed 39 redundant places. [2022-01-19 08:47:45,595 INFO L242 Difference]: Finished difference. Result has 1111 places, 2721 transitions, 120404 flow [2022-01-19 08:47:45,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=115479, PETRI_DIFFERENCE_MINUEND_PLACES=1069, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=120404, PETRI_PLACES=1111, PETRI_TRANSITIONS=2721} [2022-01-19 08:47:45,597 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1035 predicate places. [2022-01-19 08:47:45,597 INFO L470 AbstractCegarLoop]: Abstraction has has 1111 places, 2721 transitions, 120404 flow [2022-01-19 08:47:45,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 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) [2022-01-19 08:47:45,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:47:45,598 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:47:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 08:47:45,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 08:47:45,798 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:47:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:47:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash -705547355, now seen corresponding path program 24 times [2022-01-19 08:47:45,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:47:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172548967] [2022-01-19 08:47:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:47:45,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:47:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:47:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:45,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:47:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172548967] [2022-01-19 08:47:45,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172548967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:47:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470066846] [2022-01-19 08:47:45,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:47:45,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:47:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:47:45,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:47:45,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 08:47:46,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:47:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:47:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 08:47:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:47:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:46,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:47:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:47:47,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470066846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:47:47,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:47:47,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-01-19 08:47:47,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254473293] [2022-01-19 08:47:47,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:47:47,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 08:47:47,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:47:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 08:47:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 08:47:47,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:47:47,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 2721 transitions, 120404 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:47,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:47:47,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:47:47,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:47:56,424 INFO L129 PetriNetUnfolder]: 1923/6368 cut-off events. [2022-01-19 08:47:56,424 INFO L130 PetriNetUnfolder]: For 570979/570984 co-relation queries the response was YES. [2022-01-19 08:47:56,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98318 conditions, 6368 events. 1923/6368 cut-off events. For 570979/570984 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 66488 event pairs, 48 based on Foata normal form. 24/6372 useless extension candidates. Maximal degree in co-relation 98034. Up to 1534 conditions per place. [2022-01-19 08:47:56,580 INFO L132 encePairwiseOnDemand]: 65/86 looper letters, 923 selfloop transitions, 1972 changer transitions 57/2993 dead transitions. [2022-01-19 08:47:56,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 2993 transitions, 135252 flow [2022-01-19 08:47:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 08:47:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 08:47:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3858 transitions. [2022-01-19 08:47:56,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6408637873754153 [2022-01-19 08:47:56,585 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3858 transitions. [2022-01-19 08:47:56,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3858 transitions. [2022-01-19 08:47:56,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:47:56,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3858 transitions. [2022-01-19 08:47:56,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.114285714285714) internal successors, (3858), 70 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:56,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 86.0) internal successors, (6106), 71 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:56,591 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 86.0) internal successors, (6106), 71 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:47:56,591 INFO L186 Difference]: Start difference. First operand has 1111 places, 2721 transitions, 120404 flow. Second operand 70 states and 3858 transitions. [2022-01-19 08:47:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 2993 transitions, 135252 flow [2022-01-19 08:48:02,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1153 places, 2993 transitions, 133910 flow, removed 66 selfloop flow, removed 24 redundant places. [2022-01-19 08:48:02,904 INFO L242 Difference]: Finished difference. Result has 1181 places, 2831 transitions, 131187 flow [2022-01-19 08:48:02,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=119199, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=131187, PETRI_PLACES=1181, PETRI_TRANSITIONS=2831} [2022-01-19 08:48:02,907 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1105 predicate places. [2022-01-19 08:48:02,907 INFO L470 AbstractCegarLoop]: Abstraction has has 1181 places, 2831 transitions, 131187 flow [2022-01-19 08:48:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:02,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:02,907 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:48:02,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 08:48:03,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 08:48:03,122 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -21380387, now seen corresponding path program 25 times [2022-01-19 08:48:03,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:03,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832845573] [2022-01-19 08:48:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:03,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:03,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832845573] [2022-01-19 08:48:03,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832845573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392657666] [2022-01-19 08:48:03,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:48:03,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:03,277 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:03,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 08:48:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:48:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:04,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392657666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:04,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:04,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:48:04,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697635162] [2022-01-19 08:48:04,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:04,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:48:04,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:48:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:48:04,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:48:04,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1181 places, 2831 transitions, 131187 flow. Second operand has 32 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) [2022-01-19 08:48:04,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:04,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:48:04,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:48:12,016 INFO L129 PetriNetUnfolder]: 1882/6112 cut-off events. [2022-01-19 08:48:12,016 INFO L130 PetriNetUnfolder]: For 547241/547246 co-relation queries the response was YES. [2022-01-19 08:48:12,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100104 conditions, 6112 events. 1882/6112 cut-off events. For 547241/547246 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62654 event pairs, 86 based on Foata normal form. 5/6079 useless extension candidates. Maximal degree in co-relation 99799. Up to 2864 conditions per place. [2022-01-19 08:48:12,209 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1256 selfloop transitions, 1658 changer transitions 6/2961 dead transitions. [2022-01-19 08:48:12,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1209 places, 2961 transitions, 141260 flow [2022-01-19 08:48:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 08:48:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 08:48:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2093 transitions. [2022-01-19 08:48:12,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640452876376989 [2022-01-19 08:48:12,215 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2093 transitions. [2022-01-19 08:48:12,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2093 transitions. [2022-01-19 08:48:12,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:48:12,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2093 transitions. [2022-01-19 08:48:12,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.078947368421055) internal successors, (2093), 38 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:12,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:12,219 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:12,219 INFO L186 Difference]: Start difference. First operand has 1181 places, 2831 transitions, 131187 flow. Second operand 38 states and 2093 transitions. [2022-01-19 08:48:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1209 places, 2961 transitions, 141260 flow [2022-01-19 08:48:19,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1174 places, 2961 transitions, 137804 flow, removed 1199 selfloop flow, removed 35 redundant places. [2022-01-19 08:48:19,732 INFO L242 Difference]: Finished difference. Result has 1186 places, 2890 transitions, 134829 flow [2022-01-19 08:48:19,734 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=128524, PETRI_DIFFERENCE_MINUEND_PLACES=1137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=134829, PETRI_PLACES=1186, PETRI_TRANSITIONS=2890} [2022-01-19 08:48:19,734 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1110 predicate places. [2022-01-19 08:48:19,734 INFO L470 AbstractCegarLoop]: Abstraction has has 1186 places, 2890 transitions, 134829 flow [2022-01-19 08:48:19,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:48:19,735 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:19,735 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:48:19,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-19 08:48:19,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 08:48:19,950 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash -332518107, now seen corresponding path program 26 times [2022-01-19 08:48:19,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420111086] [2022-01-19 08:48:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:19,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:20,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420111086] [2022-01-19 08:48:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420111086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862364733] [2022-01-19 08:48:20,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:48:20,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:20,121 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:20,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 08:48:20,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:48:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:48:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:48:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:20,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862364733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:20,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:20,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:48:20,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174874515] [2022-01-19 08:48:20,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:20,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:48:20,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:48:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:48:20,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:48:20,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1186 places, 2890 transitions, 134829 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:20,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:20,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:48:20,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:48:28,310 INFO L129 PetriNetUnfolder]: 1905/6154 cut-off events. [2022-01-19 08:48:28,311 INFO L130 PetriNetUnfolder]: For 496140/496145 co-relation queries the response was YES. [2022-01-19 08:48:28,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99584 conditions, 6154 events. 1905/6154 cut-off events. For 496140/496145 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 62839 event pairs, 82 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 99285. Up to 2605 conditions per place. [2022-01-19 08:48:28,477 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1329 selfloop transitions, 1644 changer transitions 8/3022 dead transitions. [2022-01-19 08:48:28,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 3022 transitions, 144951 flow [2022-01-19 08:48:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 08:48:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 08:48:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2098 transitions. [2022-01-19 08:48:28,479 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6419828641370869 [2022-01-19 08:48:28,479 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2098 transitions. [2022-01-19 08:48:28,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2098 transitions. [2022-01-19 08:48:28,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:48:28,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2098 transitions. [2022-01-19 08:48:28,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.21052631578947) internal successors, (2098), 38 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) [2022-01-19 08:48:28,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:28,484 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:28,484 INFO L186 Difference]: Start difference. First operand has 1186 places, 2890 transitions, 134829 flow. Second operand 38 states and 2098 transitions. [2022-01-19 08:48:28,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 3022 transitions, 144951 flow [2022-01-19 08:48:34,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1207 places, 3022 transitions, 144723 flow, removed 53 selfloop flow, removed 13 redundant places. [2022-01-19 08:48:35,032 INFO L242 Difference]: Finished difference. Result has 1218 places, 2939 transitions, 143313 flow [2022-01-19 08:48:35,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=134625, PETRI_DIFFERENCE_MINUEND_PLACES=1170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=143313, PETRI_PLACES=1218, PETRI_TRANSITIONS=2939} [2022-01-19 08:48:35,035 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1142 predicate places. [2022-01-19 08:48:35,035 INFO L470 AbstractCegarLoop]: Abstraction has has 1218 places, 2939 transitions, 143313 flow [2022-01-19 08:48:35,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:35,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:35,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:48:35,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 08:48:35,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 08:48:35,243 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 29545351, now seen corresponding path program 27 times [2022-01-19 08:48:35,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754903056] [2022-01-19 08:48:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:35,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:35,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754903056] [2022-01-19 08:48:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754903056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889909568] [2022-01-19 08:48:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:48:35,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:35,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:35,422 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:35,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 08:48:35,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:48:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:48:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:48:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889909568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:36,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:36,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:48:36,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208768696] [2022-01-19 08:48:36,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:48:36,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:48:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:48:36,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:48:36,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1218 places, 2939 transitions, 143313 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:36,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:36,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:48:36,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:48:44,738 INFO L129 PetriNetUnfolder]: 1947/6238 cut-off events. [2022-01-19 08:48:44,738 INFO L130 PetriNetUnfolder]: For 562151/562156 co-relation queries the response was YES. [2022-01-19 08:48:44,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105610 conditions, 6238 events. 1947/6238 cut-off events. For 562151/562156 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 63829 event pairs, 75 based on Foata normal form. 5/6211 useless extension candidates. Maximal degree in co-relation 105303. Up to 2610 conditions per place. [2022-01-19 08:48:44,926 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1388 selfloop transitions, 1660 changer transitions 8/3097 dead transitions. [2022-01-19 08:48:44,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1259 places, 3097 transitions, 155526 flow [2022-01-19 08:48:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 08:48:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 08:48:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2511 transitions. [2022-01-19 08:48:44,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634732052578362 [2022-01-19 08:48:44,929 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2511 transitions. [2022-01-19 08:48:44,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2511 transitions. [2022-01-19 08:48:44,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:48:44,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2511 transitions. [2022-01-19 08:48:44,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.58695652173913) internal successors, (2511), 46 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:44,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 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) [2022-01-19 08:48:44,932 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 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) [2022-01-19 08:48:44,933 INFO L186 Difference]: Start difference. First operand has 1218 places, 2939 transitions, 143313 flow. Second operand 46 states and 2511 transitions. [2022-01-19 08:48:44,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1259 places, 3097 transitions, 155526 flow [2022-01-19 08:48:52,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1236 places, 3097 transitions, 155182 flow, removed 38 selfloop flow, removed 23 redundant places. [2022-01-19 08:48:52,520 INFO L242 Difference]: Finished difference. Result has 1243 places, 2984 transitions, 149249 flow [2022-01-19 08:48:52,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142989, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=149249, PETRI_PLACES=1243, PETRI_TRANSITIONS=2984} [2022-01-19 08:48:52,523 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1167 predicate places. [2022-01-19 08:48:52,523 INFO L470 AbstractCegarLoop]: Abstraction has has 1243 places, 2984 transitions, 149249 flow [2022-01-19 08:48:52,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:48:52,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:48:52,524 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] [2022-01-19 08:48:52,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-19 08:48:52,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:52,744 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:48:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:48:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2111950715, now seen corresponding path program 28 times [2022-01-19 08:48:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:48:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471162847] [2022-01-19 08:48:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:48:52,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:48:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:48:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:52,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:48:52,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471162847] [2022-01-19 08:48:52,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471162847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:48:52,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558467725] [2022-01-19 08:48:52,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:48:52,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:48:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:48:52,925 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:48:52,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-19 08:48:52,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:48:52,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:48:52,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:48:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:48:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:48:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:48:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558467725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:48:53,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:48:53,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:48:53,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097161227] [2022-01-19 08:48:53,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:48:53,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:48:53,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:48:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:48:53,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:48:53,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:48:53,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1243 places, 2984 transitions, 149249 flow. Second operand has 32 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) [2022-01-19 08:48:53,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:48:53,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:48:53,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:49:05,350 INFO L129 PetriNetUnfolder]: 2363/7511 cut-off events. [2022-01-19 08:49:05,351 INFO L130 PetriNetUnfolder]: For 696871/696876 co-relation queries the response was YES. [2022-01-19 08:49:05,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129523 conditions, 7511 events. 2363/7511 cut-off events. For 696871/696876 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 79655 event pairs, 105 based on Foata normal form. 9/7481 useless extension candidates. Maximal degree in co-relation 129213. Up to 3124 conditions per place. [2022-01-19 08:49:05,671 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1499 selfloop transitions, 2269 changer transitions 20/3829 dead transitions. [2022-01-19 08:49:05,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1327 places, 3829 transitions, 193509 flow [2022-01-19 08:49:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 08:49:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 08:49:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4786 transitions. [2022-01-19 08:49:05,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.632399577167019 [2022-01-19 08:49:05,673 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4786 transitions. [2022-01-19 08:49:05,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4786 transitions. [2022-01-19 08:49:05,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:49:05,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4786 transitions. [2022-01-19 08:49:05,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 54.38636363636363) internal successors, (4786), 88 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,680 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:05,680 INFO L186 Difference]: Start difference. First operand has 1243 places, 2984 transitions, 149249 flow. Second operand 88 states and 4786 transitions. [2022-01-19 08:49:05,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1327 places, 3829 transitions, 193509 flow [2022-01-19 08:49:15,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1305 places, 3829 transitions, 191658 flow, removed 35 selfloop flow, removed 22 redundant places. [2022-01-19 08:49:15,203 INFO L242 Difference]: Finished difference. Result has 1345 places, 3625 transitions, 188775 flow [2022-01-19 08:49:15,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=147722, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=188775, PETRI_PLACES=1345, PETRI_TRANSITIONS=3625} [2022-01-19 08:49:15,205 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1269 predicate places. [2022-01-19 08:49:15,205 INFO L470 AbstractCegarLoop]: Abstraction has has 1345 places, 3625 transitions, 188775 flow [2022-01-19 08:49:15,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:49:15,206 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:49:15,206 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:49:15,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-19 08:49:15,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:49:15,422 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:49:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:49:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 748254819, now seen corresponding path program 29 times [2022-01-19 08:49:15,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:49:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426653847] [2022-01-19 08:49:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:49:15,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:49:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:49:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:15,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:49:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426653847] [2022-01-19 08:49:15,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426653847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:49:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828203478] [2022-01-19 08:49:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:49:15,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:49:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:49:15,589 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:49:15,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-19 08:49:15,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:49:15,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:49:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:49:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:49:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:15,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:49:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828203478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:49:16,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:49:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:49:16,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068975331] [2022-01-19 08:49:16,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:49:16,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:49:16,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:49:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:49:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:49:16,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:49:16,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1345 places, 3625 transitions, 188775 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:16,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:49:16,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:49:16,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:49:32,268 INFO L129 PetriNetUnfolder]: 2863/8963 cut-off events. [2022-01-19 08:49:32,268 INFO L130 PetriNetUnfolder]: For 905620/905625 co-relation queries the response was YES. [2022-01-19 08:49:32,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161023 conditions, 8963 events. 2863/8963 cut-off events. For 905620/905625 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 98169 event pairs, 94 based on Foata normal form. 52/8982 useless extension candidates. Maximal degree in co-relation 160679. Up to 3763 conditions per place. [2022-01-19 08:49:32,552 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2025 selfloop transitions, 2407 changer transitions 58/4531 dead transitions. [2022-01-19 08:49:32,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1398 places, 4531 transitions, 241608 flow [2022-01-19 08:49:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 08:49:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 08:49:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3446 transitions. [2022-01-19 08:49:32,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6360280546327058 [2022-01-19 08:49:32,554 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3446 transitions. [2022-01-19 08:49:32,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3446 transitions. [2022-01-19 08:49:32,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:49:32,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3446 transitions. [2022-01-19 08:49:32,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.698412698412696) internal successors, (3446), 63 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:32,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 86.0) internal successors, (5504), 64 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:32,559 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 86.0) internal successors, (5504), 64 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:32,559 INFO L186 Difference]: Start difference. First operand has 1345 places, 3625 transitions, 188775 flow. Second operand 63 states and 3446 transitions. [2022-01-19 08:49:32,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1398 places, 4531 transitions, 241608 flow [2022-01-19 08:49:47,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1375 places, 4531 transitions, 239482 flow, removed 1026 selfloop flow, removed 23 redundant places. [2022-01-19 08:49:47,260 INFO L242 Difference]: Finished difference. Result has 1422 places, 4286 transitions, 232869 flow [2022-01-19 08:49:47,263 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=187585, PETRI_DIFFERENCE_MINUEND_PLACES=1313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=232869, PETRI_PLACES=1422, PETRI_TRANSITIONS=4286} [2022-01-19 08:49:47,264 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1346 predicate places. [2022-01-19 08:49:47,264 INFO L470 AbstractCegarLoop]: Abstraction has has 1422 places, 4286 transitions, 232869 flow [2022-01-19 08:49:47,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:47,264 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:49:47,264 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:49:47,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-19 08:49:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 08:49:47,478 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:49:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:49:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1229955019, now seen corresponding path program 30 times [2022-01-19 08:49:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:49:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686377849] [2022-01-19 08:49:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:49:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:49:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:49:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:47,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:49:47,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686377849] [2022-01-19 08:49:47,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686377849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:49:47,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114031778] [2022-01-19 08:49:47,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:49:47,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:49:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:49:47,612 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:49:47,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-19 08:49:47,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:49:47,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:49:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:49:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:49:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:47,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:49:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:49:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114031778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:49:48,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:49:48,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:49:48,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577947607] [2022-01-19 08:49:48,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:49:48,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:49:48,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:49:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:49:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:49:48,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:49:48,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1422 places, 4286 transitions, 232869 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:49:48,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:49:48,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:49:48,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:50:07,492 INFO L129 PetriNetUnfolder]: 2849/8783 cut-off events. [2022-01-19 08:50:07,492 INFO L130 PetriNetUnfolder]: For 980310/980325 co-relation queries the response was YES. [2022-01-19 08:50:07,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165488 conditions, 8783 events. 2849/8783 cut-off events. For 980310/980325 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 94888 event pairs, 97 based on Foata normal form. 25/8780 useless extension candidates. Maximal degree in co-relation 165108. Up to 2947 conditions per place. [2022-01-19 08:50:07,885 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1641 selfloop transitions, 2710 changer transitions 42/4434 dead transitions. [2022-01-19 08:50:07,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1475 places, 4434 transitions, 245883 flow [2022-01-19 08:50:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-19 08:50:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-01-19 08:50:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4047 transitions. [2022-01-19 08:50:07,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6359208045254557 [2022-01-19 08:50:07,888 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4047 transitions. [2022-01-19 08:50:07,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4047 transitions. [2022-01-19 08:50:07,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:50:07,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4047 transitions. [2022-01-19 08:50:07,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 54.689189189189186) internal successors, (4047), 74 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:07,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:07,894 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 86.0) internal successors, (6450), 75 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:07,894 INFO L186 Difference]: Start difference. First operand has 1422 places, 4286 transitions, 232869 flow. Second operand 74 states and 4047 transitions. [2022-01-19 08:50:07,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1475 places, 4434 transitions, 245883 flow [2022-01-19 08:50:24,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1452 places, 4434 transitions, 244885 flow, removed 474 selfloop flow, removed 23 redundant places. [2022-01-19 08:50:24,781 INFO L242 Difference]: Finished difference. Result has 1459 places, 4265 transitions, 236679 flow [2022-01-19 08:50:24,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=230168, PETRI_DIFFERENCE_MINUEND_PLACES=1379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=236679, PETRI_PLACES=1459, PETRI_TRANSITIONS=4265} [2022-01-19 08:50:24,785 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1383 predicate places. [2022-01-19 08:50:24,785 INFO L470 AbstractCegarLoop]: Abstraction has has 1459 places, 4265 transitions, 236679 flow [2022-01-19 08:50:24,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:24,785 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:50:24,785 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:50:24,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-19 08:50:24,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:50:24,995 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:50:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:50:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -472880727, now seen corresponding path program 31 times [2022-01-19 08:50:24,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:50:24,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698898439] [2022-01-19 08:50:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:50:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:50:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:50:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:25,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:50:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698898439] [2022-01-19 08:50:25,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698898439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:50:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209843298] [2022-01-19 08:50:25,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:50:25,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:50:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:50:25,166 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:50:25,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-19 08:50:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:50:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:50:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:50:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:25,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:50:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:50:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209843298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:50:25,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:50:25,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:50:25,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483441874] [2022-01-19 08:50:25,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:50:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:50:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:50:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:50:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:50:25,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:50:25,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1459 places, 4265 transitions, 236679 flow. Second operand has 31 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) [2022-01-19 08:50:25,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:50:25,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:50:25,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:50:41,709 INFO L129 PetriNetUnfolder]: 2926/8865 cut-off events. [2022-01-19 08:50:41,710 INFO L130 PetriNetUnfolder]: For 1020880/1020895 co-relation queries the response was YES. [2022-01-19 08:50:41,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173645 conditions, 8865 events. 2926/8865 cut-off events. For 1020880/1020895 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 95173 event pairs, 116 based on Foata normal form. 10/8837 useless extension candidates. Maximal degree in co-relation 173274. Up to 4283 conditions per place. [2022-01-19 08:50:41,996 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1926 selfloop transitions, 2562 changer transitions 8/4537 dead transitions. [2022-01-19 08:50:41,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1475 places, 4537 transitions, 258413 flow [2022-01-19 08:50:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 08:50:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 08:50:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2022-01-19 08:50:41,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.645764119601329 [2022-01-19 08:50:41,998 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2022-01-19 08:50:41,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2022-01-19 08:50:41,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:50:41,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2022-01-19 08:50:41,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 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) [2022-01-19 08:50:42,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:42,000 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:50:42,000 INFO L186 Difference]: Start difference. First operand has 1459 places, 4265 transitions, 236679 flow. Second operand 28 states and 1555 transitions. [2022-01-19 08:50:42,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1475 places, 4537 transitions, 258413 flow [2022-01-19 08:50:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1434 places, 4537 transitions, 255511 flow, removed 177 selfloop flow, removed 41 redundant places. [2022-01-19 08:50:59,633 INFO L242 Difference]: Finished difference. Result has 1452 places, 4431 transitions, 254396 flow [2022-01-19 08:50:59,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=233947, PETRI_DIFFERENCE_MINUEND_PLACES=1407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=254396, PETRI_PLACES=1452, PETRI_TRANSITIONS=4431} [2022-01-19 08:50:59,637 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1376 predicate places. [2022-01-19 08:50:59,637 INFO L470 AbstractCegarLoop]: Abstraction has has 1452 places, 4431 transitions, 254396 flow [2022-01-19 08:50:59,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 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) [2022-01-19 08:50:59,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:50:59,637 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:50:59,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-19 08:50:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:50:59,839 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:50:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:50:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash 957402633, now seen corresponding path program 32 times [2022-01-19 08:50:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:50:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823218711] [2022-01-19 08:50:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:50:59,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:50:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:51:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:00,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:51:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823218711] [2022-01-19 08:51:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823218711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:51:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775791745] [2022-01-19 08:51:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:51:00,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:51:00,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:51:00,005 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:51:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-19 08:51:00,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:51:00,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:51:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:51:00,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:51:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:51:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:00,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775791745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:51:00,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:51:00,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:51:00,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143356164] [2022-01-19 08:51:00,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:51:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:51:00,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:51:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:51:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:51:00,733 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:51:00,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1452 places, 4431 transitions, 254396 flow. Second operand has 32 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) [2022-01-19 08:51:00,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:51:00,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:51:00,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:51:19,367 INFO L129 PetriNetUnfolder]: 2948/8894 cut-off events. [2022-01-19 08:51:19,367 INFO L130 PetriNetUnfolder]: For 1090197/1090212 co-relation queries the response was YES. [2022-01-19 08:51:19,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179089 conditions, 8894 events. 2948/8894 cut-off events. For 1090197/1090212 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 95280 event pairs, 114 based on Foata normal form. 9/8865 useless extension candidates. Maximal degree in co-relation 178708. Up to 4141 conditions per place. [2022-01-19 08:51:19,672 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1868 selfloop transitions, 2617 changer transitions 6/4532 dead transitions. [2022-01-19 08:51:19,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1482 places, 4532 transitions, 266431 flow [2022-01-19 08:51:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 08:51:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 08:51:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1932 transitions. [2022-01-19 08:51:19,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2022-01-19 08:51:19,673 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1932 transitions. [2022-01-19 08:51:19,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1932 transitions. [2022-01-19 08:51:19,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:51:19,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1932 transitions. [2022-01-19 08:51:19,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.2) internal successors, (1932), 35 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:51:19,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 86.0) internal successors, (3096), 36 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:51:19,677 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 86.0) internal successors, (3096), 36 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:51:19,677 INFO L186 Difference]: Start difference. First operand has 1452 places, 4431 transitions, 254396 flow. Second operand 35 states and 1932 transitions. [2022-01-19 08:51:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1482 places, 4532 transitions, 266431 flow [2022-01-19 08:51:38,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1467 places, 4532 transitions, 266301 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-01-19 08:51:38,905 INFO L242 Difference]: Finished difference. Result has 1478 places, 4462 transitions, 265169 flow [2022-01-19 08:51:38,907 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=254282, PETRI_DIFFERENCE_MINUEND_PLACES=1433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=265169, PETRI_PLACES=1478, PETRI_TRANSITIONS=4462} [2022-01-19 08:51:38,908 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1402 predicate places. [2022-01-19 08:51:38,908 INFO L470 AbstractCegarLoop]: Abstraction has has 1478 places, 4462 transitions, 265169 flow [2022-01-19 08:51:38,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:51:38,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:51:38,908 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:51:38,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-19 08:51:39,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-19 08:51:39,109 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:51:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:51:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1583815767, now seen corresponding path program 33 times [2022-01-19 08:51:39,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:51:39,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258334299] [2022-01-19 08:51:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:51:39,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:51:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:51:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:39,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:51:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258334299] [2022-01-19 08:51:39,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258334299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:51:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80316541] [2022-01-19 08:51:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:51:39,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:51:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:51:39,255 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:51:39,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-19 08:51:39,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:51:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:51:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:51:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:51:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:51:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:51:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80316541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:51:40,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:51:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:51:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873284838] [2022-01-19 08:51:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:51:40,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:51:40,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:51:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:51:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:51:40,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:51:40,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1478 places, 4462 transitions, 265169 flow. Second operand has 32 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) [2022-01-19 08:51:40,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:51:40,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:51:40,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:52:03,581 INFO L129 PetriNetUnfolder]: 3358/10096 cut-off events. [2022-01-19 08:52:03,581 INFO L130 PetriNetUnfolder]: For 1355762/1355777 co-relation queries the response was YES. [2022-01-19 08:52:03,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208784 conditions, 10096 events. 3358/10096 cut-off events. For 1355762/1355777 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 110823 event pairs, 95 based on Foata normal form. 14/10070 useless extension candidates. Maximal degree in co-relation 208396. Up to 3256 conditions per place. [2022-01-19 08:52:03,952 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1760 selfloop transitions, 3488 changer transitions 16/5305 dead transitions. [2022-01-19 08:52:03,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1545 places, 5305 transitions, 318813 flow [2022-01-19 08:52:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-19 08:52:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-01-19 08:52:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3867 transitions. [2022-01-19 08:52:03,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6333114968883066 [2022-01-19 08:52:03,954 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3867 transitions. [2022-01-19 08:52:03,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3867 transitions. [2022-01-19 08:52:03,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:52:03,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3867 transitions. [2022-01-19 08:52:03,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 54.46478873239437) internal successors, (3867), 71 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:03,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:03,960 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:03,960 INFO L186 Difference]: Start difference. First operand has 1478 places, 4462 transitions, 265169 flow. Second operand 71 states and 3867 transitions. [2022-01-19 08:52:03,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1545 places, 5305 transitions, 318813 flow [2022-01-19 08:52:28,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1536 places, 5305 transitions, 318719 flow, removed 31 selfloop flow, removed 9 redundant places. [2022-01-19 08:52:28,365 INFO L242 Difference]: Finished difference. Result has 1564 places, 5094 transitions, 312370 flow [2022-01-19 08:52:28,368 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=265099, PETRI_DIFFERENCE_MINUEND_PLACES=1466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2892, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=312370, PETRI_PLACES=1564, PETRI_TRANSITIONS=5094} [2022-01-19 08:52:28,368 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1488 predicate places. [2022-01-19 08:52:28,368 INFO L470 AbstractCegarLoop]: Abstraction has has 1564 places, 5094 transitions, 312370 flow [2022-01-19 08:52:28,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:52:28,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:52:28,368 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] [2022-01-19 08:52:28,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-19 08:52:28,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-19 08:52:28,569 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:52:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:52:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1996243731, now seen corresponding path program 34 times [2022-01-19 08:52:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:52:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570746878] [2022-01-19 08:52:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:52:28,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:52:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:52:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:52:28,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:52:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570746878] [2022-01-19 08:52:28,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570746878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:52:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057985809] [2022-01-19 08:52:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:52:28,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:52:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:52:28,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:52:28,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-19 08:52:28,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:52:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:52:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:52:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:52:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:52:29,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:52:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:52:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057985809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:52:29,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:52:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:52:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094257160] [2022-01-19 08:52:29,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:52:29,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:52:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:52:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:52:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:52:29,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:52:29,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1564 places, 5094 transitions, 312370 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:29,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:52:29,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:52:29,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:52:59,468 INFO L129 PetriNetUnfolder]: 3696/10947 cut-off events. [2022-01-19 08:52:59,468 INFO L130 PetriNetUnfolder]: For 1622829/1622844 co-relation queries the response was YES. [2022-01-19 08:52:59,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237262 conditions, 10947 events. 3696/10947 cut-off events. For 1622829/1622844 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 121071 event pairs, 129 based on Foata normal form. 53/10969 useless extension candidates. Maximal degree in co-relation 236849. Up to 4275 conditions per place. [2022-01-19 08:52:59,885 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2364 selfloop transitions, 3351 changer transitions 52/5808 dead transitions. [2022-01-19 08:52:59,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1618 places, 5808 transitions, 363443 flow [2022-01-19 08:52:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 08:52:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 08:52:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3323 transitions. [2022-01-19 08:52:59,889 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6334349980937858 [2022-01-19 08:52:59,889 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3323 transitions. [2022-01-19 08:52:59,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3323 transitions. [2022-01-19 08:52:59,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:52:59,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3323 transitions. [2022-01-19 08:52:59,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.47540983606557) internal successors, (3323), 61 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:59,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:59,894 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:52:59,894 INFO L186 Difference]: Start difference. First operand has 1564 places, 5094 transitions, 312370 flow. Second operand 61 states and 3323 transitions. [2022-01-19 08:52:59,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1618 places, 5808 transitions, 363443 flow [2022-01-19 08:53:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1590 places, 5808 transitions, 360844 flow, removed 989 selfloop flow, removed 28 redundant places. [2022-01-19 08:53:31,098 INFO L242 Difference]: Finished difference. Result has 1627 places, 5595 transitions, 355001 flow [2022-01-19 08:53:31,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=306492, PETRI_DIFFERENCE_MINUEND_PLACES=1530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=355001, PETRI_PLACES=1627, PETRI_TRANSITIONS=5595} [2022-01-19 08:53:31,101 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1551 predicate places. [2022-01-19 08:53:31,101 INFO L470 AbstractCegarLoop]: Abstraction has has 1627 places, 5595 transitions, 355001 flow [2022-01-19 08:53:31,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:31,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:53:31,101 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] [2022-01-19 08:53:31,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-19 08:53:31,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-19 08:53:31,315 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:53:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:53:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -392691941, now seen corresponding path program 35 times [2022-01-19 08:53:31,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:53:31,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681545685] [2022-01-19 08:53:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:53:31,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:53:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:53:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:53:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:53:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681545685] [2022-01-19 08:53:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681545685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:53:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389219282] [2022-01-19 08:53:31,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:53:31,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:53:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:53:31,457 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:53:31,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-19 08:53:31,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:53:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:53:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:53:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:53:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:53:31,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:53:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:53:32,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389219282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:53:32,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:53:32,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:53:32,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999139074] [2022-01-19 08:53:32,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:53:32,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:53:32,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:53:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:53:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:53:32,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:53:32,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1627 places, 5595 transitions, 355001 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:53:32,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:53:32,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:53:32,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:54:08,189 INFO L129 PetriNetUnfolder]: 3856/11389 cut-off events. [2022-01-19 08:54:08,189 INFO L130 PetriNetUnfolder]: For 1830241/1830256 co-relation queries the response was YES. [2022-01-19 08:54:08,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254212 conditions, 11389 events. 3856/11389 cut-off events. For 1830241/1830256 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 126119 event pairs, 105 based on Foata normal form. 24/11383 useless extension candidates. Maximal degree in co-relation 253772. Up to 3899 conditions per place. [2022-01-19 08:54:08,718 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2429 selfloop transitions, 3563 changer transitions 25/6058 dead transitions. [2022-01-19 08:54:08,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1705 places, 6058 transitions, 392645 flow [2022-01-19 08:54:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 08:54:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 08:54:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4785 transitions. [2022-01-19 08:54:08,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6322674418604651 [2022-01-19 08:54:08,721 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4785 transitions. [2022-01-19 08:54:08,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4785 transitions. [2022-01-19 08:54:08,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:54:08,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4785 transitions. [2022-01-19 08:54:08,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 54.375) internal successors, (4785), 88 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:08,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:08,729 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 86.0) internal successors, (7654), 89 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:08,729 INFO L186 Difference]: Start difference. First operand has 1627 places, 5595 transitions, 355001 flow. Second operand 88 states and 4785 transitions. [2022-01-19 08:54:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1705 places, 6058 transitions, 392645 flow [2022-01-19 08:54:45,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1688 places, 6058 transitions, 391002 flow, removed 742 selfloop flow, removed 17 redundant places. [2022-01-19 08:54:46,031 INFO L242 Difference]: Finished difference. Result has 1713 places, 5822 transitions, 381117 flow [2022-01-19 08:54:46,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=352115, PETRI_DIFFERENCE_MINUEND_PLACES=1601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=381117, PETRI_PLACES=1713, PETRI_TRANSITIONS=5822} [2022-01-19 08:54:46,034 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1637 predicate places. [2022-01-19 08:54:46,034 INFO L470 AbstractCegarLoop]: Abstraction has has 1713 places, 5822 transitions, 381117 flow [2022-01-19 08:54:46,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:46,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:54:46,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:54:46,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-19 08:54:46,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:54:46,235 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:54:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:54:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash 505823423, now seen corresponding path program 36 times [2022-01-19 08:54:46,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:54:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720774852] [2022-01-19 08:54:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:54:46,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:54:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:54:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:46,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:54:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720774852] [2022-01-19 08:54:46,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720774852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:54:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781644333] [2022-01-19 08:54:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:54:46,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:54:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:54:46,395 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:54:46,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-19 08:54:46,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:54:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:54:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:54:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:54:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:46,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:54:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:54:47,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781644333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:54:47,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:54:47,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:54:47,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759629076] [2022-01-19 08:54:47,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:54:47,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:54:47,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:54:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:54:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:54:47,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:54:47,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1713 places, 5822 transitions, 381117 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:54:47,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:54:47,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:54:47,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:28,532 INFO L129 PetriNetUnfolder]: 3970/11753 cut-off events. [2022-01-19 08:55:28,532 INFO L130 PetriNetUnfolder]: For 2001386/2001401 co-relation queries the response was YES. [2022-01-19 08:55:28,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268394 conditions, 11753 events. 3970/11753 cut-off events. For 2001386/2001401 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 130915 event pairs, 140 based on Foata normal form. 11/11736 useless extension candidates. Maximal degree in co-relation 267936. Up to 4537 conditions per place. [2022-01-19 08:55:29,057 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 2593 selfloop transitions, 3490 changer transitions 14/6138 dead transitions. [2022-01-19 08:55:29,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1771 places, 6138 transitions, 409460 flow [2022-01-19 08:55:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 08:55:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 08:55:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3660 transitions. [2022-01-19 08:55:29,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6351961124609511 [2022-01-19 08:55:29,060 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3660 transitions. [2022-01-19 08:55:29,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3660 transitions. [2022-01-19 08:55:29,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:29,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3660 transitions. [2022-01-19 08:55:29,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 54.62686567164179) internal successors, (3660), 67 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,065 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,065 INFO L186 Difference]: Start difference. First operand has 1713 places, 5822 transitions, 381117 flow. Second operand 67 states and 3660 transitions. [2022-01-19 08:55:29,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1771 places, 6138 transitions, 409460 flow [2022-01-19 08:56:10,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1740 places, 6138 transitions, 407647 flow, removed 456 selfloop flow, removed 31 redundant places. [2022-01-19 08:56:10,841 INFO L242 Difference]: Finished difference. Result has 1758 places, 5967 transitions, 401737 flow [2022-01-19 08:56:10,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=379348, PETRI_DIFFERENCE_MINUEND_PLACES=1674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=401737, PETRI_PLACES=1758, PETRI_TRANSITIONS=5967} [2022-01-19 08:56:10,844 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1682 predicate places. [2022-01-19 08:56:10,844 INFO L470 AbstractCegarLoop]: Abstraction has has 1758 places, 5967 transitions, 401737 flow [2022-01-19 08:56:10,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:10,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:56:10,844 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] [2022-01-19 08:56:10,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-19 08:56:11,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-19 08:56:11,052 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:56:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:56:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 789417423, now seen corresponding path program 37 times [2022-01-19 08:56:11,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:56:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741782549] [2022-01-19 08:56:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:56:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:56:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:11,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:56:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741782549] [2022-01-19 08:56:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741782549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:56:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479194467] [2022-01-19 08:56:11,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:56:11,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:56:11,208 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:56:11,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-19 08:56:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:56:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:56:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:56:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:11,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479194467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:56:11,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:56:11,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 08:56:11,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101071993] [2022-01-19 08:56:11,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:56:11,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 08:56:11,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:56:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 08:56:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-19 08:56:11,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:56:11,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1758 places, 5967 transitions, 401737 flow. Second operand has 32 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) [2022-01-19 08:56:11,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:56:11,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:56:11,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:56:57,742 INFO L129 PetriNetUnfolder]: 4229/12588 cut-off events. [2022-01-19 08:56:57,742 INFO L130 PetriNetUnfolder]: For 2299943/2299958 co-relation queries the response was YES. [2022-01-19 08:56:58,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 293572 conditions, 12588 events. 4229/12588 cut-off events. For 2299943/2299958 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 142662 event pairs, 160 based on Foata normal form. 11/12564 useless extension candidates. Maximal degree in co-relation 293106. Up to 6400 conditions per place. [2022-01-19 08:56:58,347 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 2941 selfloop transitions, 3511 changer transitions 30/6523 dead transitions. [2022-01-19 08:56:58,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1834 places, 6523 transitions, 446483 flow [2022-01-19 08:56:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-19 08:56:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-01-19 08:56:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4586 transitions. [2022-01-19 08:56:58,350 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634828349944629 [2022-01-19 08:56:58,350 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4586 transitions. [2022-01-19 08:56:58,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4586 transitions. [2022-01-19 08:56:58,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:56:58,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4586 transitions. [2022-01-19 08:56:58,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 54.595238095238095) internal successors, (4586), 84 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:58,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 86.0) internal successors, (7310), 85 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:58,358 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 86.0) internal successors, (7310), 85 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:58,358 INFO L186 Difference]: Start difference. First operand has 1758 places, 5967 transitions, 401737 flow. Second operand 84 states and 4586 transitions. [2022-01-19 08:56:58,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1834 places, 6523 transitions, 446483 flow [2022-01-19 08:57:44,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1803 places, 6523 transitions, 444971 flow, removed 204 selfloop flow, removed 31 redundant places. [2022-01-19 08:57:44,660 INFO L242 Difference]: Finished difference. Result has 1839 places, 6361 transitions, 440612 flow [2022-01-19 08:57:44,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=400327, PETRI_DIFFERENCE_MINUEND_PLACES=1720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=440612, PETRI_PLACES=1839, PETRI_TRANSITIONS=6361} [2022-01-19 08:57:44,664 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1763 predicate places. [2022-01-19 08:57:44,664 INFO L470 AbstractCegarLoop]: Abstraction has has 1839 places, 6361 transitions, 440612 flow [2022-01-19 08:57:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 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) [2022-01-19 08:57:44,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:57:44,664 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:57:44,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-19 08:57:44,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-19 08:57:44,870 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:57:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:57:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash -166104477, now seen corresponding path program 38 times [2022-01-19 08:57:44,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:57:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822247333] [2022-01-19 08:57:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:57:44,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:57:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:57:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:45,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:57:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822247333] [2022-01-19 08:57:45,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822247333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:57:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306257978] [2022-01-19 08:57:45,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:57:45,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:57:45,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:57:45,036 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:57:45,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-19 08:57:45,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:57:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:57:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 08:57:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:57:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:45,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:57:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306257978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:57:45,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:57:45,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-01-19 08:57:45,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847133119] [2022-01-19 08:57:45,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:57:45,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:57:45,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:57:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:57:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:57:45,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-01-19 08:57:45,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1839 places, 6361 transitions, 440612 flow. Second operand has 31 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) [2022-01-19 08:57:45,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:57:45,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-01-19 08:57:45,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 08:58:31,222 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:58:31,222 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:58:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 08:58:31,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:58:31,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-19 08:58:31,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:58:31,744 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/86 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 300646 conditions, 11081 events (4177/11080 cut-off events. For 2399923/2399938 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 126098 event pairs, 129 based on Foata normal form. 6/11461 useless extension candidates. Maximal degree in co-relation 300166. Up to 6063 conditions per place.). [2022-01-19 08:58:31,745 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:58:31,746 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:58:31,748 INFO L732 BasicCegarLoop]: Path program histogram: [38, 1, 1, 1] [2022-01-19 08:58:31,750 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:58:31,750 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:58:31,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:58:31 BasicIcfg [2022-01-19 08:58:31,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:58:31,753 INFO L158 Benchmark]: Toolchain (without parser) took 826001.79ms. Allocated memory was 379.6MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 325.9MB in the beginning and 1.4GB in the end (delta: -1.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2022-01-19 08:58:31,753 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 379.6MB. Free memory is still 343.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:58:31,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.60ms. Allocated memory is still 379.6MB. Free memory was 325.8MB in the beginning and 352.4MB in the end (delta: -26.7MB). Peak memory consumption was 15.5MB. Max. memory is 16.0GB. [2022-01-19 08:58:31,753 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.34ms. Allocated memory is still 379.6MB. Free memory was 352.4MB in the beginning and 351.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:58:31,753 INFO L158 Benchmark]: Boogie Preprocessor took 20.11ms. Allocated memory is still 379.6MB. Free memory was 351.2MB in the beginning and 349.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:58:31,754 INFO L158 Benchmark]: RCFGBuilder took 302.66ms. Allocated memory is still 379.6MB. Free memory was 349.9MB in the beginning and 336.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 08:58:31,754 INFO L158 Benchmark]: TraceAbstraction took 825459.12ms. Allocated memory was 379.6MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 336.2MB in the beginning and 1.4GB in the end (delta: -1.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2022-01-19 08:58:31,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 379.6MB. Free memory is still 343.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 187.60ms. Allocated memory is still 379.6MB. Free memory was 325.8MB in the beginning and 352.4MB in the end (delta: -26.7MB). Peak memory consumption was 15.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 21.34ms. Allocated memory is still 379.6MB. Free memory was 352.4MB in the beginning and 351.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 20.11ms. Allocated memory is still 379.6MB. Free memory was 351.2MB in the beginning and 349.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 302.66ms. Allocated memory is still 379.6MB. Free memory was 349.9MB in the beginning and 336.6MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 825459.12ms. Allocated memory was 379.6MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 336.2MB in the beginning and 1.4GB in the end (delta: -1.1GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/86 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 300646 conditions, 11081 events (4177/11080 cut-off events. For 2399923/2399938 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 126098 event pairs, 129 based on Foata normal form. 6/11461 useless extension candidates. Maximal degree in co-relation 300166. Up to 6063 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/86 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 300646 conditions, 11081 events (4177/11080 cut-off events. For 2399923/2399938 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 126098 event pairs, 129 based on Foata normal form. 6/11461 useless extension candidates. Maximal degree in co-relation 300166. Up to 6063 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/86 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 300646 conditions, 11081 events (4177/11080 cut-off events. For 2399923/2399938 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 126098 event pairs, 129 based on Foata normal form. 6/11461 useless extension candidates. Maximal degree in co-relation 300166. Up to 6063 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 825.4s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 778.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9433 SdHoareTripleChecker+Valid, 19.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9433 mSDsluCounter, 13907 SdHoareTripleChecker+Invalid, 16.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17878 mSDsCounter, 3458 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50020 IncrementalHoareTripleChecker+Invalid, 53478 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3458 mSolverCounterUnsat, 1393 mSDtfsCounter, 50020 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7614 GetRequests, 4634 SyntacticMatches, 80 SemanticMatches, 2900 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72248 ImplicationChecksByTransitivity, 64.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=440612occurred in iteration=40, InterpolantAutomatonStates: 2217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 5496 NumberOfCodeBlocks, 5460 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 8063 ConstructedInterpolants, 0 QuantifiedInterpolants, 61611 SizeOfPredicates, 463 NumberOfNonLiveVariables, 5917 ConjunctsInSsa, 767 ConjunctsInUnsatCore, 119 InterpolantComputations, 2 PerfectInterpolantSequences, 0/231 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown