./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version 839c364b
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748
--- Real Ultimate output ---
This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364
[2021-12-14 16:53:41,003 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-12-14 16:53:41,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-14 16:53:41,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-14 16:53:41,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-14 16:53:41,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-14 16:53:41,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-14 16:53:41,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-14 16:53:41,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-14 16:53:41,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-14 16:53:41,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-12-14 16:53:41,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-14 16:53:41,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-14 16:53:41,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-14 16:53:41,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-14 16:53:41,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-14 16:53:41,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-14 16:53:41,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-14 16:53:41,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-14 16:53:41,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-14 16:53:41,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-14 16:53:41,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-14 16:53:41,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-12-14 16:53:41,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-14 16:53:41,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-14 16:53:41,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-14 16:53:41,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-14 16:53:41,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-14 16:53:41,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-14 16:53:41,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-14 16:53:41,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-14 16:53:41,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-14 16:53:41,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-14 16:53:41,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-14 16:53:41,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-14 16:53:41,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-14 16:53:41,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-14 16:53:41,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-14 16:53:41,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-14 16:53:41,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-14 16:53:41,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-12-14 16:53:41,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-14 16:53:41,142 INFO L113 SettingsManager]: Loading preferences was successful
[2021-12-14 16:53:41,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-14 16:53:41,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-14 16:53:41,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-14 16:53:41,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-14 16:53:41,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-14 16:53:41,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-14 16:53:41,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-12-14 16:53:41,146 INFO L138 SettingsManager]: * Use SBE=true
[2021-12-14 16:53:41,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-14 16:53:41,147 INFO L138 SettingsManager]: * sizeof long=4
[2021-12-14 16:53:41,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-12-14 16:53:41,147 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-12-14 16:53:41,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-12-14 16:53:41,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-12-14 16:53:41,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-14 16:53:41,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-12-14 16:53:41,148 INFO L138 SettingsManager]: * sizeof long double=12
[2021-12-14 16:53:41,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-12-14 16:53:41,148 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-12-14 16:53:41,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-12-14 16:53:41,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-14 16:53:41,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-12-14 16:53:41,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-12-14 16:53:41,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-14 16:53:41,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-14 16:53:41,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-12-14 16:53:41,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-14 16:53:41,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-12-14 16:53:41,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-14 16:53:41,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF
[2021-12-14 16:53:41,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-14 16:53:41,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-14 16:53:41,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-12-14 16:53:41,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748
[2021-12-14 16:53:41,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-14 16:53:41,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-14 16:53:41,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-14 16:53:41,413 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-12-14 16:53:41,413 INFO L275 PluginConnector]: CDTParser initialized
[2021-12-14 16:53:41,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c
[2021-12-14 16:53:41,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8d93427/72a3fd3bc94e4747997904a23ebfcbb2/FLAG4307b9bd2
[2021-12-14 16:53:41,901 INFO L306 CDTParser]: Found 1 translation units.
[2021-12-14 16:53:41,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c
[2021-12-14 16:53:41,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8d93427/72a3fd3bc94e4747997904a23ebfcbb2/FLAG4307b9bd2
[2021-12-14 16:53:41,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8d93427/72a3fd3bc94e4747997904a23ebfcbb2
[2021-12-14 16:53:41,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-14 16:53:41,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-14 16:53:41,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-14 16:53:41,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-14 16:53:41,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-14 16:53:41,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:41" (1/1) ...
[2021-12-14 16:53:41,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f1dbf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:41, skipping insertion in model container
[2021-12-14 16:53:41,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:41" (1/1) ...
[2021-12-14 16:53:41,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-12-14 16:53:41,960 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-12-14 16:53:42,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160]
[2021-12-14 16:53:42,127 INFO L209 PostProcessor]: Analyzing one entry point: main
[2021-12-14 16:53:42,132 INFO L203 MainTranslator]: Completed pre-run
[2021-12-14 16:53:42,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160]
[2021-12-14 16:53:42,148 INFO L209 PostProcessor]: Analyzing one entry point: main
[2021-12-14 16:53:42,158 INFO L208 MainTranslator]: Completed translation
[2021-12-14 16:53:42,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42 WrapperNode
[2021-12-14 16:53:42,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-14 16:53:42,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-14 16:53:42,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-14 16:53:42,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-14 16:53:42,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,185 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55
[2021-12-14 16:53:42,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-14 16:53:42,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-14 16:53:42,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-14 16:53:42,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-12-14 16:53:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-14 16:53:42,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-14 16:53:42,205 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-12-14 16:53:42,205 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-12-14 16:53:42,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (1/1) ...
[2021-12-14 16:53:42,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-14 16:53:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:42,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-12-14 16:53:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-12-14 16:53:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-14 16:53:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1
[2021-12-14 16:53:42,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1
[2021-12-14 16:53:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2
[2021-12-14 16:53:42,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2
[2021-12-14 16:53:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-14 16:53:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-12-14 16:53:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-12-14 16:53:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2021-12-14 16:53:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2021-12-14 16:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-14 16:53:42,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-14 16:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-12-14 16:53:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-12-14 16:53:42,270 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement
[2021-12-14 16:53:42,355 INFO L236 CfgBuilder]: Building ICFG
[2021-12-14 16:53:42,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-14 16:53:42,522 INFO L277 CfgBuilder]: Performing block encoding
[2021-12-14 16:53:42,545 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-14 16:53:42,545 INFO L301 CfgBuilder]: Removed 2 assume(true) statements.
[2021-12-14 16:53:42,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:42 BoogieIcfgContainer
[2021-12-14 16:53:42,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-14 16:53:42,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-14 16:53:42,548 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-12-14 16:53:42,556 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-12-14 16:53:42,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:53:41" (1/3) ...
[2021-12-14 16:53:42,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51643147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:42, skipping insertion in model container
[2021-12-14 16:53:42,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:42" (2/3) ...
[2021-12-14 16:53:42,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51643147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:42, skipping insertion in model container
[2021-12-14 16:53:42,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:42" (3/3) ...
[2021-12-14 16:53:42,559 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c
[2021-12-14 16:53:42,568 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2021-12-14 16:53:42,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-14 16:53:42,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-14 16:53:42,568 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2021-12-14 16:53:42,603 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,604 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,604 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,604 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,605 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,605 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,607 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,607 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,608 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,608 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,609 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,609 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,609 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,609 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,610 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,610 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,612 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,612 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,615 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,615 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,615 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,616 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,616 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,617 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2021-12-14 16:53:42,619 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions.
[2021-12-14 16:53:42,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-14 16:53:42,670 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-12-14 16:53:42,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2021-12-14 16:53:42,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow
[2021-12-14 16:53:42,728 INFO L129 PetriNetUnfolder]: 6/82 cut-off events.
[2021-12-14 16:53:42,729 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES.
[2021-12-14 16:53:42,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place.
[2021-12-14 16:53:42,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow
[2021-12-14 16:53:42,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow
[2021-12-14 16:53:42,759 INFO L129 PetriNetUnfolder]: 6/72 cut-off events.
[2021-12-14 16:53:42,759 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES.
[2021-12-14 16:53:42,759 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:42,760 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:42,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times
[2021-12-14 16:53:42,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:42,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353829511]
[2021-12-14 16:53:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:42,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:43,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353829511]
[2021-12-14 16:53:43,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353829511] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-14 16:53:43,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-14 16:53:43,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-12-14 16:53:43,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106089046]
[2021-12-14 16:53:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-14 16:53:43,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-12-14 16:53:43,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-12-14 16:53:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2021-12-14 16:53:43,214 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84
[2021-12-14 16:53:43,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:43,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84
[2021-12-14 16:53:43,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:43,303 INFO L129 PetriNetUnfolder]: 34/134 cut-off events.
[2021-12-14 16:53:43,303 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES.
[2021-12-14 16:53:43,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place.
[2021-12-14 16:53:43,306 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions.
[2021-12-14 16:53:43,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow
[2021-12-14 16:53:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-12-14 16:53:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states.
[2021-12-14 16:53:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions.
[2021-12-14 16:53:43,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746
[2021-12-14 16:53:43,327 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions.
[2021-12-14 16:53:43,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions.
[2021-12-14 16:53:43,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:43,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions.
[2021-12-14 16:53:43,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,350 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions.
[2021-12-14 16:53:43,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow
[2021-12-14 16:53:43,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places.
[2021-12-14 16:53:43,371 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow
[2021-12-14 16:53:43,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68}
[2021-12-14 16:53:43,378 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places.
[2021-12-14 16:53:43,378 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow
[2021-12-14 16:53:43,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,379 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:43,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:43,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-14 16:53:43,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times
[2021-12-14 16:53:43,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:43,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655090858]
[2021-12-14 16:53:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:43,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:43,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655090858]
[2021-12-14 16:53:43,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655090858] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-14 16:53:43,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-14 16:53:43,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-12-14 16:53:43,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644239771]
[2021-12-14 16:53:43,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-14 16:53:43,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-14 16:53:43,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-14 16:53:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-12-14 16:53:43,496 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 84
[2021-12-14 16:53:43,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:43,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 84
[2021-12-14 16:53:43,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:43,612 INFO L129 PetriNetUnfolder]: 61/239 cut-off events.
[2021-12-14 16:53:43,612 INFO L130 PetriNetUnfolder]: For 23/37 co-relation queries the response was YES.
[2021-12-14 16:53:43,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 239 events. 61/239 cut-off events. For 23/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 908 event pairs, 26 based on Foata normal form. 12/236 useless extension candidates. Maximal degree in co-relation 220. Up to 75 conditions per place.
[2021-12-14 16:53:43,615 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 25 selfloop transitions, 5 changer transitions 1/83 dead transitions.
[2021-12-14 16:53:43,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 266 flow
[2021-12-14 16:53:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-12-14 16:53:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states.
[2021-12-14 16:53:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions.
[2021-12-14 16:53:43,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.830952380952381
[2021-12-14 16:53:43,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions.
[2021-12-14 16:53:43,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions.
[2021-12-14 16:53:43,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:43,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions.
[2021-12-14 16:53:43,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,621 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 5 states and 349 transitions.
[2021-12-14 16:53:43,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 266 flow
[2021-12-14 16:53:43,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 0 selfloop flow, removed 4 redundant places.
[2021-12-14 16:53:43,624 INFO L242 Difference]: Finished difference. Result has 76 places, 70 transitions, 172 flow
[2021-12-14 16:53:43,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=70}
[2021-12-14 16:53:43,625 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places.
[2021-12-14 16:53:43,625 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 172 flow
[2021-12-14 16:53:43,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:43,626 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:43,626 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:43,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-14 16:53:43,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906757, now seen corresponding path program 2 times
[2021-12-14 16:53:43,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:43,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459396301]
[2021-12-14 16:53:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:43,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:43,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459396301]
[2021-12-14 16:53:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459396301] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:43,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708969261]
[2021-12-14 16:53:43,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-12-14 16:53:43,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:43,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:43,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-12-14 16:53:43,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2021-12-14 16:53:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core
[2021-12-14 16:53:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-12-14 16:53:44,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-12-14 16:53:44,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708969261] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-14 16:53:44,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-12-14 16:53:44,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10
[2021-12-14 16:53:44,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375996828]
[2021-12-14 16:53:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-14 16:53:44,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-12-14 16:53:44,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-12-14 16:53:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2021-12-14 16:53:44,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84
[2021-12-14 16:53:44,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:44,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:44,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84
[2021-12-14 16:53:44,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:44,434 INFO L129 PetriNetUnfolder]: 54/189 cut-off events.
[2021-12-14 16:53:44,434 INFO L130 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES.
[2021-12-14 16:53:44,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 189 events. 54/189 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 594 event pairs, 24 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 250. Up to 73 conditions per place.
[2021-12-14 16:53:44,438 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions.
[2021-12-14 16:53:44,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 251 flow
[2021-12-14 16:53:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-12-14 16:53:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states.
[2021-12-14 16:53:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions.
[2021-12-14 16:53:44,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619
[2021-12-14 16:53:44,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions.
[2021-12-14 16:53:44,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions.
[2021-12-14 16:53:44,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:44,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions.
[2021-12-14 16:53:44,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:44,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:44,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:44,452 INFO L186 Difference]: Start difference. First operand has 76 places, 70 transitions, 172 flow. Second operand 8 states and 470 transitions.
[2021-12-14 16:53:44,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 251 flow
[2021-12-14 16:53:44,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places.
[2021-12-14 16:53:44,457 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow
[2021-12-14 16:53:44,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69}
[2021-12-14 16:53:44,459 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places.
[2021-12-14 16:53:44,459 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow
[2021-12-14 16:53:44,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:44,460 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:44,460 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:44,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-12-14 16:53:44,683 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
[2021-12-14 16:53:44,684 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 352825635, now seen corresponding path program 1 times
[2021-12-14 16:53:44,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367220985]
[2021-12-14 16:53:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:44,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:44,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367220985]
[2021-12-14 16:53:44,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367220985] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991783752]
[2021-12-14 16:53:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:44,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:44,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:44,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-12-14 16:53:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core
[2021-12-14 16:53:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:45,241 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-12-14 16:53:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991783752] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:45,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:45,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 12
[2021-12-14 16:53:45,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068202614]
[2021-12-14 16:53:45,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:45,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2021-12-14 16:53:45,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2021-12-14 16:53:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132
[2021-12-14 16:53:45,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84
[2021-12-14 16:53:45,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 12 states, 12 states have (on average 57.0) internal successors, (684), 12 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:45,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:45,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84
[2021-12-14 16:53:45,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:45,752 INFO L129 PetriNetUnfolder]: 125/438 cut-off events.
[2021-12-14 16:53:45,752 INFO L130 PetriNetUnfolder]: For 109/115 co-relation queries the response was YES.
[2021-12-14 16:53:45,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 438 events. 125/438 cut-off events. For 109/115 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2172 event pairs, 19 based on Foata normal form. 12/434 useless extension candidates. Maximal degree in co-relation 545. Up to 80 conditions per place.
[2021-12-14 16:53:45,756 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 52 selfloop transitions, 20 changer transitions 10/126 dead transitions.
[2021-12-14 16:53:45,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 505 flow
[2021-12-14 16:53:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2021-12-14 16:53:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2021-12-14 16:53:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 716 transitions.
[2021-12-14 16:53:45,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7103174603174603
[2021-12-14 16:53:45,758 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 716 transitions.
[2021-12-14 16:53:45,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 716 transitions.
[2021-12-14 16:53:45,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:45,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 716 transitions.
[2021-12-14 16:53:45,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 59.666666666666664) internal successors, (716), 12 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:45,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 84.0) internal successors, (1092), 13 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:45,763 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 84.0) internal successors, (1092), 13 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:45,764 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 12 states and 716 transitions.
[2021-12-14 16:53:45,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 505 flow
[2021-12-14 16:53:45,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 486 flow, removed 0 selfloop flow, removed 6 redundant places.
[2021-12-14 16:53:45,768 INFO L242 Difference]: Finished difference. Result has 94 places, 89 transitions, 326 flow
[2021-12-14 16:53:45,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=326, PETRI_PLACES=94, PETRI_TRANSITIONS=89}
[2021-12-14 16:53:45,769 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places.
[2021-12-14 16:53:45,769 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 326 flow
[2021-12-14 16:53:45,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 57.0) internal successors, (684), 12 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:45,769 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:45,770 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:45,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2021-12-14 16:53:45,983 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
[2021-12-14 16:53:45,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash -528069221, now seen corresponding path program 2 times
[2021-12-14 16:53:45,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:45,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86948973]
[2021-12-14 16:53:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:45,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:46,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86948973]
[2021-12-14 16:53:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86948973] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227498024]
[2021-12-14 16:53:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-12-14 16:53:46,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:46,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:46,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-12-14 16:53:46,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-12-14 16:53:46,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:53:46,252 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:46,456 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:46,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227498024] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:46,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:46,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16
[2021-12-14 16:53:46,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868799879]
[2021-12-14 16:53:46,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:46,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2021-12-14 16:53:46,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2021-12-14 16:53:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240
[2021-12-14 16:53:46,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:53:46,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 326 flow. Second operand has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:46,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:46,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:53:46,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:47,597 INFO L129 PetriNetUnfolder]: 319/823 cut-off events.
[2021-12-14 16:53:47,599 INFO L130 PetriNetUnfolder]: For 1334/1338 co-relation queries the response was YES.
[2021-12-14 16:53:47,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 823 events. 319/823 cut-off events. For 1334/1338 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4468 event pairs, 8 based on Foata normal form. 19/841 useless extension candidates. Maximal degree in co-relation 2541. Up to 172 conditions per place.
[2021-12-14 16:53:47,607 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 73 selfloop transitions, 104 changer transitions 10/244 dead transitions.
[2021-12-14 16:53:47,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 244 transitions, 1593 flow
[2021-12-14 16:53:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2021-12-14 16:53:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2021-12-14 16:53:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions.
[2021-12-14 16:53:47,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714
[2021-12-14 16:53:47,613 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions.
[2021-12-14 16:53:47,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions.
[2021-12-14 16:53:47,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:47,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions.
[2021-12-14 16:53:47,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:47,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:47,628 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:47,629 INFO L186 Difference]: Start difference. First operand has 94 places, 89 transitions, 326 flow. Second operand 32 states and 2124 transitions.
[2021-12-14 16:53:47,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 244 transitions, 1593 flow
[2021-12-14 16:53:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 244 transitions, 1589 flow, removed 2 selfloop flow, removed 2 redundant places.
[2021-12-14 16:53:47,643 INFO L242 Difference]: Finished difference. Result has 142 places, 176 transitions, 1315 flow
[2021-12-14 16:53:47,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1315, PETRI_PLACES=142, PETRI_TRANSITIONS=176}
[2021-12-14 16:53:47,645 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 68 predicate places.
[2021-12-14 16:53:47,645 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 176 transitions, 1315 flow
[2021-12-14 16:53:47,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:47,646 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:47,646 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:47,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-12-14 16:53:47,867 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
[2021-12-14 16:53:47,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 645686675, now seen corresponding path program 3 times
[2021-12-14 16:53:47,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833826437]
[2021-12-14 16:53:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:48,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833826437]
[2021-12-14 16:53:48,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833826437] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826927927]
[2021-12-14 16:53:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-12-14 16:53:48,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:48,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:48,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-12-14 16:53:48,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2021-12-14 16:53:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:48,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:53:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:48,444 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826927927] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:48,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19
[2021-12-14 16:53:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076076150]
[2021-12-14 16:53:48,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:48,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2021-12-14 16:53:48,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2021-12-14 16:53:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342
[2021-12-14 16:53:48,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:53:48,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 176 transitions, 1315 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:48,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:48,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:53:48,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:49,349 INFO L129 PetriNetUnfolder]: 409/1070 cut-off events.
[2021-12-14 16:53:49,350 INFO L130 PetriNetUnfolder]: For 7804/7811 co-relation queries the response was YES.
[2021-12-14 16:53:49,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5336 conditions, 1070 events. 409/1070 cut-off events. For 7804/7811 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6158 event pairs, 17 based on Foata normal form. 3/1068 useless extension candidates. Maximal degree in co-relation 4670. Up to 255 conditions per place.
[2021-12-14 16:53:49,364 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 102 selfloop transitions, 147 changer transitions 4/310 dead transitions.
[2021-12-14 16:53:49,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 310 transitions, 3264 flow
[2021-12-14 16:53:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2021-12-14 16:53:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2021-12-14 16:53:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1257 transitions.
[2021-12-14 16:53:49,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7875939849624061
[2021-12-14 16:53:49,369 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1257 transitions.
[2021-12-14 16:53:49,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1257 transitions.
[2021-12-14 16:53:49,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:49,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1257 transitions.
[2021-12-14 16:53:49,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.15789473684211) internal successors, (1257), 19 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:49,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:49,376 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:49,376 INFO L186 Difference]: Start difference. First operand has 142 places, 176 transitions, 1315 flow. Second operand 19 states and 1257 transitions.
[2021-12-14 16:53:49,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 310 transitions, 3264 flow
[2021-12-14 16:53:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 310 transitions, 3043 flow, removed 103 selfloop flow, removed 2 redundant places.
[2021-12-14 16:53:49,416 INFO L242 Difference]: Finished difference. Result has 171 places, 266 transitions, 2811 flow
[2021-12-14 16:53:49,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2811, PETRI_PLACES=171, PETRI_TRANSITIONS=266}
[2021-12-14 16:53:49,418 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 97 predicate places.
[2021-12-14 16:53:49,419 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 266 transitions, 2811 flow
[2021-12-14 16:53:49,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:49,419 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:49,419 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:49,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-12-14 16:53:49,635 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
[2021-12-14 16:53:49,635 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash -704667827, now seen corresponding path program 4 times
[2021-12-14 16:53:49,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564466309]
[2021-12-14 16:53:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:49,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:49,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:49,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564466309]
[2021-12-14 16:53:49,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564466309] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:49,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48805524]
[2021-12-14 16:53:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-12-14 16:53:49,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:49,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-12-14 16:53:49,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-12-14 16:53:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:53:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:50,251 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:50,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48805524] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:50,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:50,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21
[2021-12-14 16:53:50,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791065326]
[2021-12-14 16:53:50,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:50,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2021-12-14 16:53:50,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2021-12-14 16:53:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420
[2021-12-14 16:53:50,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:53:50,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 266 transitions, 2811 flow. Second operand has 21 states, 21 states have (on average 64.28571428571429) internal successors, (1350), 21 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:50,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:50,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:53:50,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:53,249 INFO L129 PetriNetUnfolder]: 651/1833 cut-off events.
[2021-12-14 16:53:53,250 INFO L130 PetriNetUnfolder]: For 19778/19782 co-relation queries the response was YES.
[2021-12-14 16:53:53,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10216 conditions, 1833 events. 651/1833 cut-off events. For 19778/19782 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12984 event pairs, 15 based on Foata normal form. 25/1853 useless extension candidates. Maximal degree in co-relation 9800. Up to 369 conditions per place.
[2021-12-14 16:53:53,274 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 131 selfloop transitions, 350 changer transitions 2/540 dead transitions.
[2021-12-14 16:53:53,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 540 transitions, 7483 flow
[2021-12-14 16:53:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states.
[2021-12-14 16:53:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2021-12-14 16:53:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3458 transitions.
[2021-12-14 16:53:53,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7916666666666666
[2021-12-14 16:53:53,283 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3458 transitions.
[2021-12-14 16:53:53,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3458 transitions.
[2021-12-14 16:53:53,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:53,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3458 transitions.
[2021-12-14 16:53:53,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 66.5) internal successors, (3458), 52 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:53,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:53,300 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:53,300 INFO L186 Difference]: Start difference. First operand has 171 places, 266 transitions, 2811 flow. Second operand 52 states and 3458 transitions.
[2021-12-14 16:53:53,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 540 transitions, 7483 flow
[2021-12-14 16:53:53,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 540 transitions, 6805 flow, removed 332 selfloop flow, removed 3 redundant places.
[2021-12-14 16:53:53,388 INFO L242 Difference]: Finished difference. Result has 239 places, 454 transitions, 6211 flow
[2021-12-14 16:53:53,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6211, PETRI_PLACES=239, PETRI_TRANSITIONS=454}
[2021-12-14 16:53:53,389 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 165 predicate places.
[2021-12-14 16:53:53,389 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 454 transitions, 6211 flow
[2021-12-14 16:53:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.28571428571429) internal successors, (1350), 21 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:53,390 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:53,390 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:53,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-12-14 16:53:53,615 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
[2021-12-14 16:53:53,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:53,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1723622655, now seen corresponding path program 5 times
[2021-12-14 16:53:53,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:53,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531120313]
[2021-12-14 16:53:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:53,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:53,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531120313]
[2021-12-14 16:53:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531120313] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873076678]
[2021-12-14 16:53:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2021-12-14 16:53:53,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:53,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:53,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2021-12-14 16:53:53,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-12-14 16:53:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core
[2021-12-14 16:53:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873076678] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:54,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:54,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20
[2021-12-14 16:53:54,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32838379]
[2021-12-14 16:53:54,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2021-12-14 16:53:54,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2021-12-14 16:53:54,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380
[2021-12-14 16:53:54,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:53:54,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 454 transitions, 6211 flow. Second operand has 20 states, 20 states have (on average 64.2) internal successors, (1284), 20 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:54,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:54,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:53:54,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:53:57,105 INFO L129 PetriNetUnfolder]: 805/2520 cut-off events.
[2021-12-14 16:53:57,105 INFO L130 PetriNetUnfolder]: For 38067/38071 co-relation queries the response was YES.
[2021-12-14 16:53:57,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 2520 events. 805/2520 cut-off events. For 38067/38071 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20558 event pairs, 12 based on Foata normal form. 26/2539 useless extension candidates. Maximal degree in co-relation 14269. Up to 463 conditions per place.
[2021-12-14 16:53:57,180 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 126 selfloop transitions, 603 changer transitions 2/788 dead transitions.
[2021-12-14 16:53:57,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 788 transitions, 12999 flow
[2021-12-14 16:53:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2021-12-14 16:53:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2021-12-14 16:53:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2951 transitions.
[2021-12-14 16:53:57,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7806878306878307
[2021-12-14 16:53:57,186 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2951 transitions.
[2021-12-14 16:53:57,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2951 transitions.
[2021-12-14 16:53:57,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:53:57,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2951 transitions.
[2021-12-14 16:53:57,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 65.57777777777778) internal successors, (2951), 45 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:57,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 84.0) internal successors, (3864), 46 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:57,201 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 84.0) internal successors, (3864), 46 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:57,201 INFO L186 Difference]: Start difference. First operand has 239 places, 454 transitions, 6211 flow. Second operand 45 states and 2951 transitions.
[2021-12-14 16:53:57,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 788 transitions, 12999 flow
[2021-12-14 16:53:57,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 788 transitions, 11731 flow, removed 568 selfloop flow, removed 12 redundant places.
[2021-12-14 16:53:57,489 INFO L242 Difference]: Finished difference. Result has 276 places, 719 transitions, 10928 flow
[2021-12-14 16:53:57,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5483, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10928, PETRI_PLACES=276, PETRI_TRANSITIONS=719}
[2021-12-14 16:53:57,491 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 202 predicate places.
[2021-12-14 16:53:57,492 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 719 transitions, 10928 flow
[2021-12-14 16:53:57,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.2) internal successors, (1284), 20 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:57,493 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:53:57,493 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:53:57,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2021-12-14 16:53:57,707 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
[2021-12-14 16:53:57,708 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:53:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:53:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1141568237, now seen corresponding path program 6 times
[2021-12-14 16:53:57,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:53:57,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348859624]
[2021-12-14 16:53:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:53:57,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:53:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:53:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:57,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:53:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348859624]
[2021-12-14 16:53:57,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348859624] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:53:57,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138467865]
[2021-12-14 16:53:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2021-12-14 16:53:57,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:53:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:53:57,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:53:57,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2021-12-14 16:53:57,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2021-12-14 16:53:57,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:53:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:53:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:53:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:58,197 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:53:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:53:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138467865] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:53:58,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:53:58,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18
[2021-12-14 16:53:58,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763042661]
[2021-12-14 16:53:58,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:53:58,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2021-12-14 16:53:58,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:53:58,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2021-12-14 16:53:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306
[2021-12-14 16:53:58,590 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:53:58,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 719 transitions, 10928 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:53:58,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:53:58,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:53:58,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:00,894 INFO L129 PetriNetUnfolder]: 977/3125 cut-off events.
[2021-12-14 16:54:00,894 INFO L130 PetriNetUnfolder]: For 41808/41817 co-relation queries the response was YES.
[2021-12-14 16:54:00,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18667 conditions, 3125 events. 977/3125 cut-off events. For 41808/41817 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27542 event pairs, 32 based on Foata normal form. 12/3122 useless extension candidates. Maximal degree in co-relation 18121. Up to 541 conditions per place.
[2021-12-14 16:54:00,930 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 251 selfloop transitions, 647 changer transitions 8/963 dead transitions.
[2021-12-14 16:54:00,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 963 transitions, 17031 flow
[2021-12-14 16:54:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states.
[2021-12-14 16:54:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2021-12-14 16:54:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3357 transitions.
[2021-12-14 16:54:00,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836134453781513
[2021-12-14 16:54:00,935 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3357 transitions.
[2021-12-14 16:54:00,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3357 transitions.
[2021-12-14 16:54:00,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:00,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3357 transitions.
[2021-12-14 16:54:00,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 65.82352941176471) internal successors, (3357), 51 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:00,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:00,946 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:00,946 INFO L186 Difference]: Start difference. First operand has 276 places, 719 transitions, 10928 flow. Second operand 51 states and 3357 transitions.
[2021-12-14 16:54:00,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 963 transitions, 17031 flow
[2021-12-14 16:54:01,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 963 transitions, 15447 flow, removed 588 selfloop flow, removed 15 redundant places.
[2021-12-14 16:54:01,270 INFO L242 Difference]: Finished difference. Result has 327 places, 885 transitions, 15003 flow
[2021-12-14 16:54:01,271 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9838, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=15003, PETRI_PLACES=327, PETRI_TRANSITIONS=885}
[2021-12-14 16:54:01,271 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 253 predicate places.
[2021-12-14 16:54:01,272 INFO L470 AbstractCegarLoop]: Abstraction has has 327 places, 885 transitions, 15003 flow
[2021-12-14 16:54:01,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:01,273 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:54:01,273 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:54:01,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2021-12-14 16:54:01,508 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
[2021-12-14 16:54:01,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:54:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:54:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash 502570629, now seen corresponding path program 7 times
[2021-12-14 16:54:01,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:54:01,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988015723]
[2021-12-14 16:54:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:54:01,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:54:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:01,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:54:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988015723]
[2021-12-14 16:54:01,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988015723] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:54:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868097689]
[2021-12-14 16:54:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2021-12-14 16:54:01,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:54:01,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:54:01,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-14 16:54:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2021-12-14 16:54:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:54:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:54:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:02,132 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:54:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:02,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868097689] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:54:02,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:54:02,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21
[2021-12-14 16:54:02,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810003278]
[2021-12-14 16:54:02,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:54:02,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2021-12-14 16:54:02,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:54:02,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2021-12-14 16:54:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420
[2021-12-14 16:54:02,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:54:02,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 885 transitions, 15003 flow. Second operand has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:02,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:54:02,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:54:02,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:04,969 INFO L129 PetriNetUnfolder]: 1275/4058 cut-off events.
[2021-12-14 16:54:04,969 INFO L130 PetriNetUnfolder]: For 43765/43775 co-relation queries the response was YES.
[2021-12-14 16:54:05,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 4058 events. 1275/4058 cut-off events. For 43765/43775 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37733 event pairs, 32 based on Foata normal form. 42/4086 useless extension candidates. Maximal degree in co-relation 24673. Up to 667 conditions per place.
[2021-12-14 16:54:05,025 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 302 selfloop transitions, 905 changer transitions 0/1264 dead transitions.
[2021-12-14 16:54:05,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1264 transitions, 24193 flow
[2021-12-14 16:54:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2021-12-14 16:54:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2021-12-14 16:54:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2392 transitions.
[2021-12-14 16:54:05,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.791005291005291
[2021-12-14 16:54:05,028 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2392 transitions.
[2021-12-14 16:54:05,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2392 transitions.
[2021-12-14 16:54:05,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:05,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2392 transitions.
[2021-12-14 16:54:05,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 66.44444444444444) internal successors, (2392), 36 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:05,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:05,036 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:05,036 INFO L186 Difference]: Start difference. First operand has 327 places, 885 transitions, 15003 flow. Second operand 36 states and 2392 transitions.
[2021-12-14 16:54:05,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1264 transitions, 24193 flow
[2021-12-14 16:54:05,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1264 transitions, 23711 flow, removed 154 selfloop flow, removed 13 redundant places.
[2021-12-14 16:54:05,504 INFO L242 Difference]: Finished difference. Result has 361 places, 1158 transitions, 23483 flow
[2021-12-14 16:54:05,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14685, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23483, PETRI_PLACES=361, PETRI_TRANSITIONS=1158}
[2021-12-14 16:54:05,505 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 287 predicate places.
[2021-12-14 16:54:05,505 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 1158 transitions, 23483 flow
[2021-12-14 16:54:05,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:05,506 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:54:05,506 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:54:05,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2021-12-14 16:54:05,706 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
[2021-12-14 16:54:05,707 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:54:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:54:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1017925137, now seen corresponding path program 8 times
[2021-12-14 16:54:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:54:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383088727]
[2021-12-14 16:54:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:54:05,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:54:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:05,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:54:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383088727]
[2021-12-14 16:54:05,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383088727] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:54:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561100304]
[2021-12-14 16:54:05,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-12-14 16:54:05,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:54:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:54:05,854 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)
[2021-12-14 16:54:05,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2021-12-14 16:54:05,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-12-14 16:54:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:54:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:54:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:54:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:06,257 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:54:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:06,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561100304] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:54:06,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:54:06,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17
[2021-12-14 16:54:06,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47966184]
[2021-12-14 16:54:06,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:54:06,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2021-12-14 16:54:06,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:54:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2021-12-14 16:54:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2021-12-14 16:54:06,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:54:06,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1158 transitions, 23483 flow. Second operand has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:06,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:54:06,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:54:06,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:10,969 INFO L129 PetriNetUnfolder]: 1553/5114 cut-off events.
[2021-12-14 16:54:10,969 INFO L130 PetriNetUnfolder]: For 73572/73579 co-relation queries the response was YES.
[2021-12-14 16:54:11,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34984 conditions, 5114 events. 1553/5114 cut-off events. For 73572/73579 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50864 event pairs, 28 based on Foata normal form. 38/5133 useless extension candidates. Maximal degree in co-relation 34726. Up to 767 conditions per place.
[2021-12-14 16:54:11,048 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 250 selfloop transitions, 1290 changer transitions 4/1601 dead transitions.
[2021-12-14 16:54:11,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1601 transitions, 35364 flow
[2021-12-14 16:54:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states.
[2021-12-14 16:54:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2021-12-14 16:54:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions.
[2021-12-14 16:54:11,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749
[2021-12-14 16:54:11,058 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions.
[2021-12-14 16:54:11,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions.
[2021-12-14 16:54:11,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:11,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions.
[2021-12-14 16:54:11,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:11,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:11,074 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:11,075 INFO L186 Difference]: Start difference. First operand has 361 places, 1158 transitions, 23483 flow. Second operand 69 states and 4529 transitions.
[2021-12-14 16:54:11,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1601 transitions, 35364 flow
[2021-12-14 16:54:12,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1601 transitions, 34878 flow, removed 208 selfloop flow, removed 6 redundant places.
[2021-12-14 16:54:12,070 INFO L242 Difference]: Finished difference. Result has 445 places, 1508 transitions, 35062 flow
[2021-12-14 16:54:12,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23151, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=35062, PETRI_PLACES=445, PETRI_TRANSITIONS=1508}
[2021-12-14 16:54:12,071 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 371 predicate places.
[2021-12-14 16:54:12,072 INFO L470 AbstractCegarLoop]: Abstraction has has 445 places, 1508 transitions, 35062 flow
[2021-12-14 16:54:12,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:12,072 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:54:12,072 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:54:12,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2021-12-14 16:54:12,272 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
[2021-12-14 16:54:12,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:54:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:54:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1896763693, now seen corresponding path program 9 times
[2021-12-14 16:54:12,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:54:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151415709]
[2021-12-14 16:54:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:54:12,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:54:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:12,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:54:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151415709]
[2021-12-14 16:54:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151415709] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:54:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719137632]
[2021-12-14 16:54:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-12-14 16:54:12,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:54:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:54:12,416 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)
[2021-12-14 16:54:12,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2021-12-14 16:54:12,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2021-12-14 16:54:12,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:54:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core
[2021-12-14 16:54:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:54:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:12,669 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:54:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:12,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719137632] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:54:12,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:54:12,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20
[2021-12-14 16:54:12,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696279177]
[2021-12-14 16:54:12,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:54:12,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2021-12-14 16:54:12,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:54:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2021-12-14 16:54:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380
[2021-12-14 16:54:12,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84
[2021-12-14 16:54:12,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1508 transitions, 35062 flow. Second operand has 20 states, 20 states have (on average 54.0) internal successors, (1080), 20 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:12,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:54:12,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84
[2021-12-14 16:54:12,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:17,456 INFO L129 PetriNetUnfolder]: 2044/6254 cut-off events.
[2021-12-14 16:54:17,456 INFO L130 PetriNetUnfolder]: For 128491/128491 co-relation queries the response was YES.
[2021-12-14 16:54:17,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50582 conditions, 6254 events. 2044/6254 cut-off events. For 128491/128491 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 62594 event pairs, 104 based on Foata normal form. 52/6297 useless extension candidates. Maximal degree in co-relation 50346. Up to 1400 conditions per place.
[2021-12-14 16:54:17,553 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 621 selfloop transitions, 1439 changer transitions 4/2105 dead transitions.
[2021-12-14 16:54:17,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 2105 transitions, 53762 flow
[2021-12-14 16:54:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states.
[2021-12-14 16:54:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2021-12-14 16:54:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3128 transitions.
[2021-12-14 16:54:17,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532999164578112
[2021-12-14 16:54:17,562 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3128 transitions.
[2021-12-14 16:54:17,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3128 transitions.
[2021-12-14 16:54:17,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:17,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3128 transitions.
[2021-12-14 16:54:17,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 54.87719298245614) internal successors, (3128), 57 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:17,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:17,573 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:17,573 INFO L186 Difference]: Start difference. First operand has 445 places, 1508 transitions, 35062 flow. Second operand 57 states and 3128 transitions.
[2021-12-14 16:54:17,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 2105 transitions, 53762 flow
[2021-12-14 16:54:19,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 2105 transitions, 53096 flow, removed 172 selfloop flow, removed 21 redundant places.
[2021-12-14 16:54:19,516 INFO L242 Difference]: Finished difference. Result has 504 places, 2035 transitions, 53818 flow
[2021-12-14 16:54:19,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=34323, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=940, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=53818, PETRI_PLACES=504, PETRI_TRANSITIONS=2035}
[2021-12-14 16:54:19,518 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 430 predicate places.
[2021-12-14 16:54:19,518 INFO L470 AbstractCegarLoop]: Abstraction has has 504 places, 2035 transitions, 53818 flow
[2021-12-14 16:54:19,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.0) internal successors, (1080), 20 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:19,519 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:54:19,519 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:54:19,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2021-12-14 16:54:19,745 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
[2021-12-14 16:54:19,745 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:54:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:54:19,746 INFO L85 PathProgramCache]: Analyzing trace with hash 965071455, now seen corresponding path program 10 times
[2021-12-14 16:54:19,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:54:19,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200708254]
[2021-12-14 16:54:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:54:19,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:54:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:19,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:54:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200708254]
[2021-12-14 16:54:19,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200708254] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:54:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194827615]
[2021-12-14 16:54:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-12-14 16:54:19,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:54:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:54:19,905 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)
[2021-12-14 16:54:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2021-12-14 16:54:19,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-12-14 16:54:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:54:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-12-14 16:54:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:54:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:20,211 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:54:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:20,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194827615] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:54:20,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:54:20,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21
[2021-12-14 16:54:20,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136570351]
[2021-12-14 16:54:20,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:54:20,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2021-12-14 16:54:20,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:54:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2021-12-14 16:54:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420
[2021-12-14 16:54:20,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:54:20,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2035 transitions, 53818 flow. Second operand has 21 states, 21 states have (on average 64.04761904761905) internal successors, (1345), 21 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:20,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:54:20,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:54:20,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:27,751 INFO L129 PetriNetUnfolder]: 2611/8128 cut-off events.
[2021-12-14 16:54:27,751 INFO L130 PetriNetUnfolder]: For 205359/205371 co-relation queries the response was YES.
[2021-12-14 16:54:27,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72882 conditions, 8128 events. 2611/8128 cut-off events. For 205359/205371 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 86255 event pairs, 48 based on Foata normal form. 54/8156 useless extension candidates. Maximal degree in co-relation 72506. Up to 1407 conditions per place.
[2021-12-14 16:54:27,922 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 425 selfloop transitions, 2226 changer transitions 7/2723 dead transitions.
[2021-12-14 16:54:27,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 2723 transitions, 77883 flow
[2021-12-14 16:54:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states.
[2021-12-14 16:54:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2021-12-14 16:54:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3651 transitions.
[2021-12-14 16:54:27,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7902597402597402
[2021-12-14 16:54:27,927 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3651 transitions.
[2021-12-14 16:54:27,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3651 transitions.
[2021-12-14 16:54:27,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:27,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3651 transitions.
[2021-12-14 16:54:27,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 66.38181818181818) internal successors, (3651), 55 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:27,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:27,939 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:27,939 INFO L186 Difference]: Start difference. First operand has 504 places, 2035 transitions, 53818 flow. Second operand 55 states and 3651 transitions.
[2021-12-14 16:54:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 2723 transitions, 77883 flow
[2021-12-14 16:54:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 2723 transitions, 75880 flow, removed 789 selfloop flow, removed 11 redundant places.
[2021-12-14 16:54:31,912 INFO L242 Difference]: Finished difference. Result has 563 places, 2611 transitions, 76755 flow
[2021-12-14 16:54:31,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52117, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=76755, PETRI_PLACES=563, PETRI_TRANSITIONS=2611}
[2021-12-14 16:54:31,915 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places.
[2021-12-14 16:54:31,915 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 2611 transitions, 76755 flow
[2021-12-14 16:54:31,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.04761904761905) internal successors, (1345), 21 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:31,916 INFO L246 CegarLoopForPetriNet]: Found error trace
[2021-12-14 16:54:31,916 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-14 16:54:31,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2021-12-14 16:54:32,140 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
[2021-12-14 16:54:32,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] ===
[2021-12-14 16:54:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-12-14 16:54:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash 694189159, now seen corresponding path program 11 times
[2021-12-14 16:54:32,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-14 16:54:32,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572878196]
[2021-12-14 16:54:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-14 16:54:32,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-14 16:54:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-14 16:54:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:32,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-14 16:54:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572878196]
[2021-12-14 16:54:32,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572878196] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-14 16:54:32,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131989148]
[2021-12-14 16:54:32,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2021-12-14 16:54:32,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-14 16:54:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-14 16:54:32,268 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)
[2021-12-14 16:54:32,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2021-12-14 16:54:32,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2021-12-14 16:54:32,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-14 16:54:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core
[2021-12-14 16:54:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-12-14 16:54:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:32,555 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-12-14 16:54:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-14 16:54:32,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131989148] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-14 16:54:32,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-14 16:54:32,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20
[2021-12-14 16:54:32,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005464477]
[2021-12-14 16:54:32,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-14 16:54:32,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2021-12-14 16:54:32,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-14 16:54:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2021-12-14 16:54:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380
[2021-12-14 16:54:32,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84
[2021-12-14 16:54:32,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2611 transitions, 76755 flow. Second operand has 20 states, 20 states have (on average 63.95) internal successors, (1279), 20 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:32,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2021-12-14 16:54:32,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84
[2021-12-14 16:54:32,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2021-12-14 16:54:40,643 INFO L129 PetriNetUnfolder]: 3004/9535 cut-off events.
[2021-12-14 16:54:40,644 INFO L130 PetriNetUnfolder]: For 288812/288826 co-relation queries the response was YES.
[2021-12-14 16:54:40,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92621 conditions, 9535 events. 3004/9535 cut-off events. For 288812/288826 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 105074 event pairs, 38 based on Foata normal form. 5/9524 useless extension candidates. Maximal degree in co-relation 91112. Up to 1798 conditions per place.
[2021-12-14 16:54:40,809 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 808 selfloop transitions, 2303 changer transitions 3/3179 dead transitions.
[2021-12-14 16:54:40,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 3179 transitions, 100881 flow
[2021-12-14 16:54:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2021-12-14 16:54:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2021-12-14 16:54:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2734 transitions.
[2021-12-14 16:54:40,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7749433106575964
[2021-12-14 16:54:40,811 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2734 transitions.
[2021-12-14 16:54:40,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2734 transitions.
[2021-12-14 16:54:40,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2021-12-14 16:54:40,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2734 transitions.
[2021-12-14 16:54:40,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 65.0952380952381) internal successors, (2734), 42 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:40,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:40,819 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-14 16:54:40,819 INFO L186 Difference]: Start difference. First operand has 563 places, 2611 transitions, 76755 flow. Second operand 42 states and 2734 transitions.
[2021-12-14 16:54:40,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 3179 transitions, 100881 flow