/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:06:35,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:06:35,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:06:35,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:06:35,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:06:35,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:06:35,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:06:35,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:06:35,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:06:35,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:06:35,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:06:35,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:06:35,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:06:35,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:06:35,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:06:35,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:06:35,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:06:35,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:06:35,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:06:35,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:06:35,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:06:35,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:06:35,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:06:35,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:06:35,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:06:35,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:06:35,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:06:35,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:06:35,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:06:35,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:06:35,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:06:35,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:06:35,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:06:35,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:06:35,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:06:35,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:06:35,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:06:35,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:06:35,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:06:35,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:06:35,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:06:35,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 14:06:35,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:06:35,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:06:35,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:06:35,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:06:35,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:06:35,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:06:35,273 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:06:35,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:06:35,273 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:06:35,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:06:35,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:06:35,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:06:35,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:06:35,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:06:35,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:06:35,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:06:35,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:06:35,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:06:35,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:06:35,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:06:35,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:06:35,522 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:06:35,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2022-01-19 14:06:35,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2370153/022bfb475e54479a8c51a20f92615719/FLAG5f5d02b8f [2022-01-19 14:06:35,936 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:06:35,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2022-01-19 14:06:35,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2370153/022bfb475e54479a8c51a20f92615719/FLAG5f5d02b8f [2022-01-19 14:06:35,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2370153/022bfb475e54479a8c51a20f92615719 [2022-01-19 14:06:35,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:06:35,955 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:06:35,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:06:35,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:06:35,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:06:35,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:06:35" (1/1) ... [2022-01-19 14:06:35,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c356c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:35, skipping insertion in model container [2022-01-19 14:06:35,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:06:35" (1/1) ... [2022-01-19 14:06:35,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:06:35,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:06:36,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2022-01-19 14:06:36,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:06:36,147 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:06:36,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2022-01-19 14:06:36,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:06:36,191 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:06:36,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36 WrapperNode [2022-01-19 14:06:36,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:06:36,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:06:36,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:06:36,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:06:36,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,217 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-01-19 14:06:36,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:06:36,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:06:36,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:06:36,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:06:36,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:06:36,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:06:36,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:06:36,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:06:36,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (1/1) ... [2022-01-19 14:06:36,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:06:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:36,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 14:06:36,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 14:06:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:06:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:06:36,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:06:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:06:36,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:06:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:06:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:06:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:06:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:06:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:06:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:06:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:06:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:06:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:06:36,307 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:06:36,360 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:06:36,361 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:06:36,474 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:06:36,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:06:36,504 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:06:36,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:06:36 BoogieIcfgContainer [2022-01-19 14:06:36,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:06:36,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:06:36,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:06:36,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:06:36,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:06:35" (1/3) ... [2022-01-19 14:06:36,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149cd20a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:06:36, skipping insertion in model container [2022-01-19 14:06:36,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:06:36" (2/3) ... [2022-01-19 14:06:36,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149cd20a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:06:36, skipping insertion in model container [2022-01-19 14:06:36,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:06:36" (3/3) ... [2022-01-19 14:06:36,512 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-01-19 14:06:36,517 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:06:36,517 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:06:36,517 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:06:36,547 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,548 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,548 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,548 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,549 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,549 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,549 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,549 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,550 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,550 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,550 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,550 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,551 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,552 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,552 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,552 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,552 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,553 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,554 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,554 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,554 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,554 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,555 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,556 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,556 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,556 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,557 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,558 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,561 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,562 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,563 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:06:36,568 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:06:36,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:06:36,619 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:06:36,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:06:36,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-01-19 14:06:36,711 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-01-19 14:06:36,711 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:06:36,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-01-19 14:06:36,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-01-19 14:06:36,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-01-19 14:06:36,745 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-01-19 14:06:36,745 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:06:36,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:36,747 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:36,747 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 751055543, now seen corresponding path program 1 times [2022-01-19 14:06:36,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:36,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351407379] [2022-01-19 14:06:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:36,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:37,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351407379] [2022-01-19 14:06:37,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351407379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:06:37,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:06:37,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:06:37,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321581436] [2022-01-19 14:06:37,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:06:37,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:06:37,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:06:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:06:37,145 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-01-19 14:06:37,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:37,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-01-19 14:06:37,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:37,265 INFO L129 PetriNetUnfolder]: 8/105 cut-off events. [2022-01-19 14:06:37,265 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 14:06:37,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 105 events. 8/105 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 1 based on Foata normal form. 16/112 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2022-01-19 14:06:37,267 INFO L132 encePairwiseOnDemand]: 67/77 looper letters, 11 selfloop transitions, 2 changer transitions 7/71 dead transitions. [2022-01-19 14:06:37,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 203 flow [2022-01-19 14:06:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:06:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:06:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2022-01-19 14:06:37,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2022-01-19 14:06:37,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2022-01-19 14:06:37,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2022-01-19 14:06:37,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:37,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2022-01-19 14:06:37,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,315 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 6 states and 394 transitions. [2022-01-19 14:06:37,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 203 flow [2022-01-19 14:06:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:06:37,328 INFO L242 Difference]: Finished difference. Result has 72 places, 63 transitions, 146 flow [2022-01-19 14:06:37,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2022-01-19 14:06:37,337 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2022-01-19 14:06:37,337 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 146 flow [2022-01-19 14:06:37,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:37,338 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:37,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:06:37,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash 600101581, now seen corresponding path program 1 times [2022-01-19 14:06:37,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:37,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80060587] [2022-01-19 14:06:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:37,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:37,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80060587] [2022-01-19 14:06:37,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80060587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:06:37,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:06:37,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:06:37,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031407603] [2022-01-19 14:06:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:06:37,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:06:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:06:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:06:37,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:37,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:37,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:37,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:37,530 INFO L129 PetriNetUnfolder]: 90/304 cut-off events. [2022-01-19 14:06:37,531 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-01-19 14:06:37,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 304 events. 90/304 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1346 event pairs, 32 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 541. Up to 99 conditions per place. [2022-01-19 14:06:37,534 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 35 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2022-01-19 14:06:37,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 301 flow [2022-01-19 14:06:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:06:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:06:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 372 transitions. [2022-01-19 14:06:37,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-01-19 14:06:37,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 372 transitions. [2022-01-19 14:06:37,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 372 transitions. [2022-01-19 14:06:37,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:37,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 372 transitions. [2022-01-19 14:06:37,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,539 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,539 INFO L186 Difference]: Start difference. First operand has 72 places, 63 transitions, 146 flow. Second operand 6 states and 372 transitions. [2022-01-19 14:06:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 301 flow [2022-01-19 14:06:37,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 293 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 14:06:37,542 INFO L242 Difference]: Finished difference. Result has 73 places, 65 transitions, 166 flow [2022-01-19 14:06:37,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2022-01-19 14:06:37,543 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-01-19 14:06:37,543 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 166 flow [2022-01-19 14:06:37,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:37,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:37,544 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:37,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:06:37,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 651339935, now seen corresponding path program 2 times [2022-01-19 14:06:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690885629] [2022-01-19 14:06:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:37,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:37,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690885629] [2022-01-19 14:06:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690885629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246019457] [2022-01-19 14:06:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:06:37,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:37,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:37,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 14:06:37,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:37,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 14:06:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:37,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:38,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246019457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:38,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:38,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 14:06:38,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998718394] [2022-01-19 14:06:38,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:38,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 14:06:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 14:06:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 14:06:38,056 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:38,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:38,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:38,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:38,280 INFO L129 PetriNetUnfolder]: 147/407 cut-off events. [2022-01-19 14:06:38,281 INFO L130 PetriNetUnfolder]: For 129/137 co-relation queries the response was YES. [2022-01-19 14:06:38,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 407 events. 147/407 cut-off events. For 129/137 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1890 event pairs, 12 based on Foata normal form. 11/413 useless extension candidates. Maximal degree in co-relation 727. Up to 54 conditions per place. [2022-01-19 14:06:38,289 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 27 changer transitions 6/131 dead transitions. [2022-01-19 14:06:38,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 560 flow [2022-01-19 14:06:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 14:06:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 14:06:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-01-19 14:06:38,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-01-19 14:06:38,294 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-01-19 14:06:38,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-01-19 14:06:38,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:38,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-01-19 14:06:38,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,301 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,301 INFO L186 Difference]: Start difference. First operand has 73 places, 65 transitions, 166 flow. Second operand 14 states and 854 transitions. [2022-01-19 14:06:38,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 560 flow [2022-01-19 14:06:38,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 535 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-01-19 14:06:38,307 INFO L242 Difference]: Finished difference. Result has 89 places, 91 transitions, 342 flow [2022-01-19 14:06:38,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2022-01-19 14:06:38,309 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2022-01-19 14:06:38,309 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 342 flow [2022-01-19 14:06:38,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:38,310 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:38,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:38,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:38,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1948148621, now seen corresponding path program 3 times [2022-01-19 14:06:38,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:38,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987095010] [2022-01-19 14:06:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:38,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:38,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987095010] [2022-01-19 14:06:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987095010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:06:38,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:06:38,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:06:38,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216378456] [2022-01-19 14:06:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:06:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:06:38,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:06:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:06:38,590 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:38,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:38,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:38,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:38,673 INFO L129 PetriNetUnfolder]: 153/421 cut-off events. [2022-01-19 14:06:38,673 INFO L130 PetriNetUnfolder]: For 550/552 co-relation queries the response was YES. [2022-01-19 14:06:38,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 421 events. 153/421 cut-off events. For 550/552 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1942 event pairs, 64 based on Foata normal form. 3/417 useless extension candidates. Maximal degree in co-relation 944. Up to 221 conditions per place. [2022-01-19 14:06:38,677 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 55 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2022-01-19 14:06:38,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 582 flow [2022-01-19 14:06:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:06:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:06:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-01-19 14:06:38,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-01-19 14:06:38,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-01-19 14:06:38,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-01-19 14:06:38,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:38,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-01-19 14:06:38,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,681 INFO L186 Difference]: Start difference. First operand has 89 places, 91 transitions, 342 flow. Second operand 5 states and 317 transitions. [2022-01-19 14:06:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 582 flow [2022-01-19 14:06:38,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 578 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-01-19 14:06:38,687 INFO L242 Difference]: Finished difference. Result has 95 places, 96 transitions, 415 flow [2022-01-19 14:06:38,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2022-01-19 14:06:38,688 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2022-01-19 14:06:38,688 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 415 flow [2022-01-19 14:06:38,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:38,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:38,688 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:38,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:06:38,689 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash -497140103, now seen corresponding path program 4 times [2022-01-19 14:06:38,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:38,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258900193] [2022-01-19 14:06:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:38,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:38,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258900193] [2022-01-19 14:06:38,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258900193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009476677] [2022-01-19 14:06:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:06:38,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:38,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:38,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:38,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 14:06:38,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:06:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 14:06:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:38,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:39,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009476677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:39,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:39,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 14:06:39,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157379691] [2022-01-19 14:06:39,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:39,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 14:06:39,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 14:06:39,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 14:06:39,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:39,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 415 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:39,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:39,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:39,275 INFO L129 PetriNetUnfolder]: 165/506 cut-off events. [2022-01-19 14:06:39,275 INFO L130 PetriNetUnfolder]: For 900/902 co-relation queries the response was YES. [2022-01-19 14:06:39,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 506 events. 165/506 cut-off events. For 900/902 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2591 event pairs, 36 based on Foata normal form. 9/508 useless extension candidates. Maximal degree in co-relation 1102. Up to 114 conditions per place. [2022-01-19 14:06:39,279 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-01-19 14:06:39,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 883 flow [2022-01-19 14:06:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 14:06:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 14:06:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-01-19 14:06:39,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-01-19 14:06:39,281 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-01-19 14:06:39,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-01-19 14:06:39,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:39,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-01-19 14:06:39,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,285 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,285 INFO L186 Difference]: Start difference. First operand has 95 places, 96 transitions, 415 flow. Second operand 9 states and 564 transitions. [2022-01-19 14:06:39,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 883 flow [2022-01-19 14:06:39,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 867 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 14:06:39,291 INFO L242 Difference]: Finished difference. Result has 107 places, 113 transitions, 648 flow [2022-01-19 14:06:39,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=648, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2022-01-19 14:06:39,292 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 39 predicate places. [2022-01-19 14:06:39,292 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 648 flow [2022-01-19 14:06:39,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:39,292 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:39,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:39,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:39,504 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1146310219, now seen corresponding path program 5 times [2022-01-19 14:06:39,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:39,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926698559] [2022-01-19 14:06:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:39,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:39,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926698559] [2022-01-19 14:06:39,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926698559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051317299] [2022-01-19 14:06:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:06:39,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:39,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:39,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 14:06:39,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:39,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 14:06:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:39,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:39,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051317299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:39,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:39,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 14:06:39,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966503917] [2022-01-19 14:06:39,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:39,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 14:06:39,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 14:06:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-19 14:06:39,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:39,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 648 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:39,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:39,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:40,043 INFO L129 PetriNetUnfolder]: 200/610 cut-off events. [2022-01-19 14:06:40,044 INFO L130 PetriNetUnfolder]: For 1371/1373 co-relation queries the response was YES. [2022-01-19 14:06:40,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 610 events. 200/610 cut-off events. For 1371/1373 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3446 event pairs, 16 based on Foata normal form. 11/615 useless extension candidates. Maximal degree in co-relation 1509. Up to 106 conditions per place. [2022-01-19 14:06:40,049 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 64 selfloop transitions, 52 changer transitions 2/162 dead transitions. [2022-01-19 14:06:40,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1131 flow [2022-01-19 14:06:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:06:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:06:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-01-19 14:06:40,051 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-01-19 14:06:40,051 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-01-19 14:06:40,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-01-19 14:06:40,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:40,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-01-19 14:06:40,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,055 INFO L186 Difference]: Start difference. First operand has 107 places, 113 transitions, 648 flow. Second operand 12 states and 743 transitions. [2022-01-19 14:06:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1131 flow [2022-01-19 14:06:40,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 1117 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-01-19 14:06:40,064 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 850 flow [2022-01-19 14:06:40,064 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=850, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2022-01-19 14:06:40,064 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2022-01-19 14:06:40,065 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 850 flow [2022-01-19 14:06:40,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,065 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:40,065 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:40,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:40,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:40,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1190561105, now seen corresponding path program 6 times [2022-01-19 14:06:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954234963] [2022-01-19 14:06:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:40,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954234963] [2022-01-19 14:06:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954234963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:06:40,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:06:40,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 14:06:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20343683] [2022-01-19 14:06:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:06:40,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 14:06:40,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 14:06:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 14:06:40,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 14:06:40,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:40,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 14:06:40,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:40,446 INFO L129 PetriNetUnfolder]: 199/570 cut-off events. [2022-01-19 14:06:40,446 INFO L130 PetriNetUnfolder]: For 1517/1519 co-relation queries the response was YES. [2022-01-19 14:06:40,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 570 events. 199/570 cut-off events. For 1517/1519 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3139 event pairs, 91 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1618. Up to 231 conditions per place. [2022-01-19 14:06:40,451 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-01-19 14:06:40,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1111 flow [2022-01-19 14:06:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 14:06:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 14:06:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-01-19 14:06:40,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-01-19 14:06:40,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-01-19 14:06:40,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-01-19 14:06:40,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:40,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-01-19 14:06:40,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,455 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,455 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 850 flow. Second operand 5 states and 315 transitions. [2022-01-19 14:06:40,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1111 flow [2022-01-19 14:06:40,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 137 transitions, 1086 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-01-19 14:06:40,463 INFO L242 Difference]: Finished difference. Result has 122 places, 122 transitions, 849 flow [2022-01-19 14:06:40,463 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2022-01-19 14:06:40,464 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-01-19 14:06:40,464 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 849 flow [2022-01-19 14:06:40,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:40,465 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 14:06:40,465 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1682419139, now seen corresponding path program 1 times [2022-01-19 14:06:40,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587340061] [2022-01-19 14:06:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:40,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:06:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587340061] [2022-01-19 14:06:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587340061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997619755] [2022-01-19 14:06:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:40,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:40,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:40,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 14:06:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 14:06:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:06:40,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:06:40,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997619755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:40,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:40,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-19 14:06:40,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129371589] [2022-01-19 14:06:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:40,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:06:40,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:40,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:06:40,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:06:40,804 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-01-19 14:06:40,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:40,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-01-19 14:06:40,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:40,912 INFO L129 PetriNetUnfolder]: 103/595 cut-off events. [2022-01-19 14:06:40,913 INFO L130 PetriNetUnfolder]: For 1064/1093 co-relation queries the response was YES. [2022-01-19 14:06:40,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 595 events. 103/595 cut-off events. For 1064/1093 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3915 event pairs, 10 based on Foata normal form. 12/597 useless extension candidates. Maximal degree in co-relation 1465. Up to 79 conditions per place. [2022-01-19 14:06:40,918 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-01-19 14:06:40,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 939 flow [2022-01-19 14:06:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 14:06:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 14:06:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-01-19 14:06:40,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-01-19 14:06:40,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-01-19 14:06:40,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-01-19 14:06:40,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:40,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-01-19 14:06:40,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,923 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,923 INFO L186 Difference]: Start difference. First operand has 122 places, 122 transitions, 849 flow. Second operand 6 states and 395 transitions. [2022-01-19 14:06:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 939 flow [2022-01-19 14:06:40,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 829 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-01-19 14:06:40,930 INFO L242 Difference]: Finished difference. Result has 118 places, 124 transitions, 771 flow [2022-01-19 14:06:40,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2022-01-19 14:06:40,932 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-01-19 14:06:40,932 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 771 flow [2022-01-19 14:06:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:40,933 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] [2022-01-19 14:06:40,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:41,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:41,147 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1656979189, now seen corresponding path program 2 times [2022-01-19 14:06:41,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405373640] [2022-01-19 14:06:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:41,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:41,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:41,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405373640] [2022-01-19 14:06:41,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405373640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784609464] [2022-01-19 14:06:41,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:06:41,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:41,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:41,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 14:06:41,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:41,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:41,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784609464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:41,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:41,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:06:41,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566617284] [2022-01-19 14:06:41,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:06:41,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:06:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:06:41,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:41,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 771 flow. Second operand has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:41,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:41,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:41,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:43,027 INFO L129 PetriNetUnfolder]: 1266/3622 cut-off events. [2022-01-19 14:06:43,027 INFO L130 PetriNetUnfolder]: For 5997/5997 co-relation queries the response was YES. [2022-01-19 14:06:43,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11411 conditions, 3622 events. 1266/3622 cut-off events. For 5997/5997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 30698 event pairs, 136 based on Foata normal form. 34/3644 useless extension candidates. Maximal degree in co-relation 11308. Up to 388 conditions per place. [2022-01-19 14:06:43,098 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 231 selfloop transitions, 207 changer transitions 28/508 dead transitions. [2022-01-19 14:06:43,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 508 transitions, 4079 flow [2022-01-19 14:06:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 14:06:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 14:06:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3555 transitions. [2022-01-19 14:06:43,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7568660847349372 [2022-01-19 14:06:43,108 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3555 transitions. [2022-01-19 14:06:43,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3555 transitions. [2022-01-19 14:06:43,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:43,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3555 transitions. [2022-01-19 14:06:43,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.278688524590166) internal successors, (3555), 61 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:43,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:43,127 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:43,127 INFO L186 Difference]: Start difference. First operand has 118 places, 124 transitions, 771 flow. Second operand 61 states and 3555 transitions. [2022-01-19 14:06:43,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 508 transitions, 4079 flow [2022-01-19 14:06:43,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 508 transitions, 4007 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-01-19 14:06:43,144 INFO L242 Difference]: Finished difference. Result has 190 places, 327 transitions, 2668 flow [2022-01-19 14:06:43,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2668, PETRI_PLACES=190, PETRI_TRANSITIONS=327} [2022-01-19 14:06:43,145 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2022-01-19 14:06:43,145 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 327 transitions, 2668 flow [2022-01-19 14:06:43,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:43,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:43,146 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] [2022-01-19 14:06:43,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:43,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:43,368 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1790021439, now seen corresponding path program 3 times [2022-01-19 14:06:43,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:43,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211892321] [2022-01-19 14:06:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:43,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:43,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211892321] [2022-01-19 14:06:43,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211892321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575386760] [2022-01-19 14:06:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:06:43,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:43,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:43,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 14:06:43,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:06:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:43,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:43,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575386760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:43,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:43,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 14:06:43,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745152927] [2022-01-19 14:06:43,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:43,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 14:06:43,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 14:06:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-19 14:06:43,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:43,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 327 transitions, 2668 flow. Second operand has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:43,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:43,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:43,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:44,798 INFO L129 PetriNetUnfolder]: 1421/4102 cut-off events. [2022-01-19 14:06:44,798 INFO L130 PetriNetUnfolder]: For 17951/17951 co-relation queries the response was YES. [2022-01-19 14:06:44,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 4102 events. 1421/4102 cut-off events. For 17951/17951 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 36168 event pairs, 243 based on Foata normal form. 19/4087 useless extension candidates. Maximal degree in co-relation 15806. Up to 963 conditions per place. [2022-01-19 14:06:44,836 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 190 selfloop transitions, 268 changer transitions 33/533 dead transitions. [2022-01-19 14:06:44,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 533 transitions, 5469 flow [2022-01-19 14:06:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 14:06:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 14:06:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-01-19 14:06:44,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-01-19 14:06:44,839 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-01-19 14:06:44,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-01-19 14:06:44,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:44,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-01-19 14:06:44,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:44,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:44,849 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:44,849 INFO L186 Difference]: Start difference. First operand has 190 places, 327 transitions, 2668 flow. Second operand 23 states and 1355 transitions. [2022-01-19 14:06:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 533 transitions, 5469 flow [2022-01-19 14:06:44,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 533 transitions, 5102 flow, removed 120 selfloop flow, removed 7 redundant places. [2022-01-19 14:06:44,931 INFO L242 Difference]: Finished difference. Result has 215 places, 413 transitions, 4025 flow [2022-01-19 14:06:44,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4025, PETRI_PLACES=215, PETRI_TRANSITIONS=413} [2022-01-19 14:06:44,932 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2022-01-19 14:06:44,932 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 413 transitions, 4025 flow [2022-01-19 14:06:44,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:44,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:44,933 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] [2022-01-19 14:06:44,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:45,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:45,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:45,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1983759899, now seen corresponding path program 4 times [2022-01-19 14:06:45,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:45,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464317753] [2022-01-19 14:06:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:45,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:45,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464317753] [2022-01-19 14:06:45,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464317753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048827087] [2022-01-19 14:06:45,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:06:45,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:45,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:45,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 14:06:45,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:06:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:45,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:45,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:45,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048827087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:45,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:06:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130521631] [2022-01-19 14:06:45,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:45,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:06:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:06:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:06:45,630 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:45,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 413 transitions, 4025 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:45,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:45,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:45,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:46,866 INFO L129 PetriNetUnfolder]: 1688/4815 cut-off events. [2022-01-19 14:06:46,867 INFO L130 PetriNetUnfolder]: For 32142/32142 co-relation queries the response was YES. [2022-01-19 14:06:46,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22322 conditions, 4815 events. 1688/4815 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43903 event pairs, 221 based on Foata normal form. 23/4794 useless extension candidates. Maximal degree in co-relation 21111. Up to 1022 conditions per place. [2022-01-19 14:06:46,917 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 219 selfloop transitions, 356 changer transitions 4/621 dead transitions. [2022-01-19 14:06:46,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 621 transitions, 7180 flow [2022-01-19 14:06:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 14:06:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 14:06:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-01-19 14:06:46,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-01-19 14:06:46,920 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-01-19 14:06:46,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-01-19 14:06:46,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:46,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-01-19 14:06:46,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:46,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:46,928 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:46,928 INFO L186 Difference]: Start difference. First operand has 215 places, 413 transitions, 4025 flow. Second operand 30 states and 1753 transitions. [2022-01-19 14:06:46,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 621 transitions, 7180 flow [2022-01-19 14:06:47,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 621 transitions, 7127 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-01-19 14:06:47,068 INFO L242 Difference]: Finished difference. Result has 256 places, 512 transitions, 6429 flow [2022-01-19 14:06:47,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6429, PETRI_PLACES=256, PETRI_TRANSITIONS=512} [2022-01-19 14:06:47,069 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 188 predicate places. [2022-01-19 14:06:47,069 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 512 transitions, 6429 flow [2022-01-19 14:06:47,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:47,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:47,070 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] [2022-01-19 14:06:47,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:47,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:47,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1217209175, now seen corresponding path program 5 times [2022-01-19 14:06:47,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:47,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713750068] [2022-01-19 14:06:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:47,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:47,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713750068] [2022-01-19 14:06:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713750068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930649095] [2022-01-19 14:06:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:06:47,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:47,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:47,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 14:06:47,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 14:06:47,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:47,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:47,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930649095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:47,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 14:06:47,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871615361] [2022-01-19 14:06:47,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:06:47,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:06:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:06:47,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:47,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 512 transitions, 6429 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:47,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:47,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:47,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:49,399 INFO L129 PetriNetUnfolder]: 2056/6005 cut-off events. [2022-01-19 14:06:49,399 INFO L130 PetriNetUnfolder]: For 63127/63127 co-relation queries the response was YES. [2022-01-19 14:06:49,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32168 conditions, 6005 events. 2056/6005 cut-off events. For 63127/63127 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58570 event pairs, 190 based on Foata normal form. 4/5983 useless extension candidates. Maximal degree in co-relation 31845. Up to 791 conditions per place. [2022-01-19 14:06:49,467 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 342 selfloop transitions, 417 changer transitions 13/814 dead transitions. [2022-01-19 14:06:49,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 814 transitions, 11197 flow [2022-01-19 14:06:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 14:06:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 14:06:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-01-19 14:06:49,473 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-01-19 14:06:49,473 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-01-19 14:06:49,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-01-19 14:06:49,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:49,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-01-19 14:06:49,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:49,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:49,484 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:49,484 INFO L186 Difference]: Start difference. First operand has 256 places, 512 transitions, 6429 flow. Second operand 47 states and 2713 transitions. [2022-01-19 14:06:49,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 814 transitions, 11197 flow [2022-01-19 14:06:49,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 814 transitions, 10756 flow, removed 93 selfloop flow, removed 9 redundant places. [2022-01-19 14:06:49,983 INFO L242 Difference]: Finished difference. Result has 307 places, 657 transitions, 9167 flow [2022-01-19 14:06:49,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=9167, PETRI_PLACES=307, PETRI_TRANSITIONS=657} [2022-01-19 14:06:49,984 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 239 predicate places. [2022-01-19 14:06:49,984 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 657 transitions, 9167 flow [2022-01-19 14:06:49,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:49,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:49,985 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] [2022-01-19 14:06:50,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:50,185 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,SelfDestructingSolverStorable11 [2022-01-19 14:06:50,185 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 118370099, now seen corresponding path program 6 times [2022-01-19 14:06:50,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:50,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985543312] [2022-01-19 14:06:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:50,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:50,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985543312] [2022-01-19 14:06:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985543312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400681922] [2022-01-19 14:06:50,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:06:50,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:50,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:50,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:50,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 14:06:50,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:06:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:50,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400681922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:50,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:50,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 14:06:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367914676] [2022-01-19 14:06:50,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 14:06:50,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 14:06:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-19 14:06:50,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:50,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 657 transitions, 9167 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:50,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:50,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:50,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:52,535 INFO L129 PetriNetUnfolder]: 2248/6588 cut-off events. [2022-01-19 14:06:52,536 INFO L130 PetriNetUnfolder]: For 78964/78964 co-relation queries the response was YES. [2022-01-19 14:06:52,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38187 conditions, 6588 events. 2248/6588 cut-off events. For 78964/78964 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65877 event pairs, 239 based on Foata normal form. 19/6586 useless extension candidates. Maximal degree in co-relation 37963. Up to 1340 conditions per place. [2022-01-19 14:06:52,675 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 270 selfloop transitions, 524 changer transitions 3/839 dead transitions. [2022-01-19 14:06:52,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 839 transitions, 12797 flow [2022-01-19 14:06:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 14:06:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 14:06:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-01-19 14:06:52,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-01-19 14:06:52,685 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-01-19 14:06:52,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-01-19 14:06:52,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:52,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-01-19 14:06:52,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:52,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:52,710 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:52,710 INFO L186 Difference]: Start difference. First operand has 307 places, 657 transitions, 9167 flow. Second operand 41 states and 2368 transitions. [2022-01-19 14:06:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 839 transitions, 12797 flow [2022-01-19 14:06:53,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 839 transitions, 12160 flow, removed 210 selfloop flow, removed 3 redundant places. [2022-01-19 14:06:53,400 INFO L242 Difference]: Finished difference. Result has 352 places, 723 transitions, 11195 flow [2022-01-19 14:06:53,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11195, PETRI_PLACES=352, PETRI_TRANSITIONS=723} [2022-01-19 14:06:53,401 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-01-19 14:06:53,401 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 723 transitions, 11195 flow [2022-01-19 14:06:53,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:53,402 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:53,402 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] [2022-01-19 14:06:53,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:53,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 14:06:53,602 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash -151736549, now seen corresponding path program 7 times [2022-01-19 14:06:53,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:53,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120959844] [2022-01-19 14:06:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:53,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:53,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120959844] [2022-01-19 14:06:53,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120959844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331888070] [2022-01-19 14:06:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:06:53,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:53,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:53,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 14:06:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:53,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:53,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331888070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:54,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:54,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 14:06:54,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465855779] [2022-01-19 14:06:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 14:06:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 14:06:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-19 14:06:54,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:54,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 723 transitions, 11195 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:54,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:54,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:54,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:56,223 INFO L129 PetriNetUnfolder]: 2315/6806 cut-off events. [2022-01-19 14:06:56,223 INFO L130 PetriNetUnfolder]: For 94421/94421 co-relation queries the response was YES. [2022-01-19 14:06:56,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 6806 events. 2315/6806 cut-off events. For 94421/94421 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68521 event pairs, 234 based on Foata normal form. 31/6802 useless extension candidates. Maximal degree in co-relation 40646. Up to 1016 conditions per place. [2022-01-19 14:06:56,307 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 328 selfloop transitions, 568 changer transitions 28/966 dead transitions. [2022-01-19 14:06:56,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 966 transitions, 15569 flow [2022-01-19 14:06:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 14:06:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 14:06:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-01-19 14:06:56,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-01-19 14:06:56,315 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-01-19 14:06:56,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-01-19 14:06:56,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:56,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-01-19 14:06:56,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:56,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:56,332 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:56,332 INFO L186 Difference]: Start difference. First operand has 352 places, 723 transitions, 11195 flow. Second operand 68 states and 3914 transitions. [2022-01-19 14:06:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 966 transitions, 15569 flow [2022-01-19 14:06:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 966 transitions, 15038 flow, removed 83 selfloop flow, removed 25 redundant places. [2022-01-19 14:06:57,198 INFO L242 Difference]: Finished difference. Result has 403 places, 772 transitions, 13155 flow [2022-01-19 14:06:57,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=13155, PETRI_PLACES=403, PETRI_TRANSITIONS=772} [2022-01-19 14:06:57,199 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 335 predicate places. [2022-01-19 14:06:57,200 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 772 transitions, 13155 flow [2022-01-19 14:06:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:57,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:57,200 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] [2022-01-19 14:06:57,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 14:06:57,400 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,SelfDestructingSolverStorable13 [2022-01-19 14:06:57,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -981160703, now seen corresponding path program 8 times [2022-01-19 14:06:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907016774] [2022-01-19 14:06:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:57,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:57,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907016774] [2022-01-19 14:06:57,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907016774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293904578] [2022-01-19 14:06:57,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:06:57,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:57,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:57,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:06:57,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 14:06:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:57,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:06:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:57,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:57,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293904578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:57,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:57,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 14:06:57,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696898703] [2022-01-19 14:06:57,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:57,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 14:06:57,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 14:06:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 14:06:57,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:06:57,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 772 transitions, 13155 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:57,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:57,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:06:57,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:59,508 INFO L129 PetriNetUnfolder]: 2327/6841 cut-off events. [2022-01-19 14:06:59,508 INFO L130 PetriNetUnfolder]: For 108630/108630 co-relation queries the response was YES. [2022-01-19 14:06:59,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43399 conditions, 6841 events. 2327/6841 cut-off events. For 108630/108630 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68847 event pairs, 657 based on Foata normal form. 1/6744 useless extension candidates. Maximal degree in co-relation 43150. Up to 2226 conditions per place. [2022-01-19 14:06:59,585 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 549 selfloop transitions, 245 changer transitions 8/844 dead transitions. [2022-01-19 14:06:59,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 844 transitions, 15539 flow [2022-01-19 14:06:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 14:06:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 14:06:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-01-19 14:06:59,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-01-19 14:06:59,589 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-01-19 14:06:59,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-01-19 14:06:59,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:59,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-01-19 14:06:59,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:59,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:59,593 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:59,593 INFO L186 Difference]: Start difference. First operand has 403 places, 772 transitions, 13155 flow. Second operand 24 states and 1386 transitions. [2022-01-19 14:06:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 844 transitions, 15539 flow [2022-01-19 14:07:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 844 transitions, 15071 flow, removed 76 selfloop flow, removed 30 redundant places. [2022-01-19 14:07:00,454 INFO L242 Difference]: Finished difference. Result has 405 places, 791 transitions, 13538 flow [2022-01-19 14:07:00,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12707, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13538, PETRI_PLACES=405, PETRI_TRANSITIONS=791} [2022-01-19 14:07:00,455 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 337 predicate places. [2022-01-19 14:07:00,455 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 791 transitions, 13538 flow [2022-01-19 14:07:00,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:00,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:00,455 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] [2022-01-19 14:07:00,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:00,656 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,SelfDestructingSolverStorable14 [2022-01-19 14:07:00,656 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 331168385, now seen corresponding path program 9 times [2022-01-19 14:07:00,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257093098] [2022-01-19 14:07:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:00,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:00,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257093098] [2022-01-19 14:07:00,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257093098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214782995] [2022-01-19 14:07:00,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:07:00,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:00,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:00,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:00,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 14:07:00,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:07:00,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:07:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:00,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214782995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:01,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:01,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:01,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050423542] [2022-01-19 14:07:01,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:01,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:01,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:01,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:07:01,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 791 transitions, 13538 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:01,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:01,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:07:01,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:04,576 INFO L129 PetriNetUnfolder]: 3673/10200 cut-off events. [2022-01-19 14:07:04,576 INFO L130 PetriNetUnfolder]: For 187722/187722 co-relation queries the response was YES. [2022-01-19 14:07:04,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68587 conditions, 10200 events. 3673/10200 cut-off events. For 187722/187722 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 107773 event pairs, 564 based on Foata normal form. 30/10127 useless extension candidates. Maximal degree in co-relation 68395. Up to 1978 conditions per place. [2022-01-19 14:07:04,686 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 488 selfloop transitions, 889 changer transitions 17/1436 dead transitions. [2022-01-19 14:07:04,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1436 transitions, 27257 flow [2022-01-19 14:07:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 14:07:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 14:07:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3930 transitions. [2022-01-19 14:07:04,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7396950875211745 [2022-01-19 14:07:04,691 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3930 transitions. [2022-01-19 14:07:04,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3930 transitions. [2022-01-19 14:07:04,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:04,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3930 transitions. [2022-01-19 14:07:04,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.95652173913044) internal successors, (3930), 69 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:04,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:04,818 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:04,818 INFO L186 Difference]: Start difference. First operand has 405 places, 791 transitions, 13538 flow. Second operand 69 states and 3930 transitions. [2022-01-19 14:07:04,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1436 transitions, 27257 flow [2022-01-19 14:07:06,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1436 transitions, 26808 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-01-19 14:07:06,131 INFO L242 Difference]: Finished difference. Result has 485 places, 1194 transitions, 24458 flow [2022-01-19 14:07:06,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=13291, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=24458, PETRI_PLACES=485, PETRI_TRANSITIONS=1194} [2022-01-19 14:07:06,132 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 417 predicate places. [2022-01-19 14:07:06,132 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 1194 transitions, 24458 flow [2022-01-19 14:07:06,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:06,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:06,133 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] [2022-01-19 14:07:06,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:06,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 14:07:06,356 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -838217509, now seen corresponding path program 10 times [2022-01-19 14:07:06,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10647227] [2022-01-19 14:07:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:06,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:06,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10647227] [2022-01-19 14:07:06,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10647227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534340105] [2022-01-19 14:07:06,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:07:06,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:06,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 14:07:06,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:07:06,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:06,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:07:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:06,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:06,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534340105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:06,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:06,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:06,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230074150] [2022-01-19 14:07:06,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:06,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:06,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:07:06,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1194 transitions, 24458 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:06,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:06,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:07:06,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:13,651 INFO L129 PetriNetUnfolder]: 6250/17016 cut-off events. [2022-01-19 14:07:13,651 INFO L130 PetriNetUnfolder]: For 440564/440564 co-relation queries the response was YES. [2022-01-19 14:07:13,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130530 conditions, 17016 events. 6250/17016 cut-off events. For 440564/440564 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 195108 event pairs, 817 based on Foata normal form. 45/16917 useless extension candidates. Maximal degree in co-relation 129212. Up to 2737 conditions per place. [2022-01-19 14:07:13,875 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 663 selfloop transitions, 1697 changer transitions 31/2433 dead transitions. [2022-01-19 14:07:13,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2433 transitions, 54424 flow [2022-01-19 14:07:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-19 14:07:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-01-19 14:07:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-01-19 14:07:13,883 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-01-19 14:07:13,883 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-01-19 14:07:13,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-01-19 14:07:13,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:13,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-01-19 14:07:13,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:13,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:13,897 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:13,897 INFO L186 Difference]: Start difference. First operand has 485 places, 1194 transitions, 24458 flow. Second operand 86 states and 4916 transitions. [2022-01-19 14:07:13,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2433 transitions, 54424 flow [2022-01-19 14:07:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2433 transitions, 53393 flow, removed 77 selfloop flow, removed 36 redundant places. [2022-01-19 14:07:19,050 INFO L242 Difference]: Finished difference. Result has 556 places, 2081 transitions, 50135 flow [2022-01-19 14:07:19,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23792, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=50135, PETRI_PLACES=556, PETRI_TRANSITIONS=2081} [2022-01-19 14:07:19,052 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 488 predicate places. [2022-01-19 14:07:19,052 INFO L470 AbstractCegarLoop]: Abstraction has has 556 places, 2081 transitions, 50135 flow [2022-01-19 14:07:19,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:19,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:19,052 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] [2022-01-19 14:07:19,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:19,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 14:07:19,275 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1400475587, now seen corresponding path program 11 times [2022-01-19 14:07:19,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755210333] [2022-01-19 14:07:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:19,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:19,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755210333] [2022-01-19 14:07:19,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755210333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749858768] [2022-01-19 14:07:19,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:07:19,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:19,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:19,350 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:19,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 14:07:19,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 14:07:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:07:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:19,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749858768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:19,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:19,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:19,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777556299] [2022-01-19 14:07:19,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:19,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:19,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:19,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:07:19,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2081 transitions, 50135 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:19,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:19,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:07:19,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:29,844 INFO L129 PetriNetUnfolder]: 6307/17364 cut-off events. [2022-01-19 14:07:29,844 INFO L130 PetriNetUnfolder]: For 577168/577168 co-relation queries the response was YES. [2022-01-19 14:07:30,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146449 conditions, 17364 events. 6307/17364 cut-off events. For 577168/577168 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 201459 event pairs, 839 based on Foata normal form. 7/17209 useless extension candidates. Maximal degree in co-relation 145139. Up to 3276 conditions per place. [2022-01-19 14:07:30,131 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 989 selfloop transitions, 1260 changer transitions 18/2309 dead transitions. [2022-01-19 14:07:30,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 2309 transitions, 58283 flow [2022-01-19 14:07:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 14:07:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 14:07:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2022-01-19 14:07:30,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7498701298701299 [2022-01-19 14:07:30,134 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2022-01-19 14:07:30,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2022-01-19 14:07:30,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:30,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2022-01-19 14:07:30,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,141 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:30,141 INFO L186 Difference]: Start difference. First operand has 556 places, 2081 transitions, 50135 flow. Second operand 50 states and 2887 transitions. [2022-01-19 14:07:30,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 2309 transitions, 58283 flow [2022-01-19 14:07:37,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2309 transitions, 57719 flow, removed 177 selfloop flow, removed 35 redundant places. [2022-01-19 14:07:37,645 INFO L242 Difference]: Finished difference. Result has 577 places, 2117 transitions, 53869 flow [2022-01-19 14:07:37,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49633, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=53869, PETRI_PLACES=577, PETRI_TRANSITIONS=2117} [2022-01-19 14:07:37,648 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 509 predicate places. [2022-01-19 14:07:37,648 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 2117 transitions, 53869 flow [2022-01-19 14:07:37,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:37,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:37,649 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] [2022-01-19 14:07:37,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:37,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:37,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:37,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash -757615803, now seen corresponding path program 12 times [2022-01-19 14:07:37,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:37,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044931087] [2022-01-19 14:07:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:37,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:37,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:37,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044931087] [2022-01-19 14:07:37,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044931087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37585174] [2022-01-19 14:07:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:07:37,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:37,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:37,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 14:07:37,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 14:07:37,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:07:37,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:38,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37585174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:38,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:38,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:07:38,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262972868] [2022-01-19 14:07:38,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:38,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:07:38,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:07:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:07:38,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:07:38,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2117 transitions, 53869 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:38,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:38,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:07:38,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:48,816 INFO L129 PetriNetUnfolder]: 6367/17760 cut-off events. [2022-01-19 14:07:48,817 INFO L130 PetriNetUnfolder]: For 657194/657194 co-relation queries the response was YES. [2022-01-19 14:07:49,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154486 conditions, 17760 events. 6367/17760 cut-off events. For 657194/657194 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 208434 event pairs, 926 based on Foata normal form. 8/17584 useless extension candidates. Maximal degree in co-relation 153213. Up to 2429 conditions per place. [2022-01-19 14:07:49,118 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 914 selfloop transitions, 1481 changer transitions 11/2448 dead transitions. [2022-01-19 14:07:49,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2448 transitions, 64426 flow [2022-01-19 14:07:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:07:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:07:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2022-01-19 14:07:49,121 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2022-01-19 14:07:49,122 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2022-01-19 14:07:49,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2022-01-19 14:07:49,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:49,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2022-01-19 14:07:49,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:49,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:49,132 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:49,132 INFO L186 Difference]: Start difference. First operand has 577 places, 2117 transitions, 53869 flow. Second operand 70 states and 4016 transitions. [2022-01-19 14:07:49,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2448 transitions, 64426 flow [2022-01-19 14:07:56,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2448 transitions, 62811 flow, removed 70 selfloop flow, removed 40 redundant places. [2022-01-19 14:07:56,951 INFO L242 Difference]: Finished difference. Result has 611 places, 2226 transitions, 58861 flow [2022-01-19 14:07:56,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=52306, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=58861, PETRI_PLACES=611, PETRI_TRANSITIONS=2226} [2022-01-19 14:07:56,953 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 543 predicate places. [2022-01-19 14:07:56,953 INFO L470 AbstractCegarLoop]: Abstraction has has 611 places, 2226 transitions, 58861 flow [2022-01-19 14:07:56,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:56,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:56,954 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] [2022-01-19 14:07:56,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 14:07:57,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:57,167 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1424025787, now seen corresponding path program 13 times [2022-01-19 14:07:57,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089700670] [2022-01-19 14:07:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:57,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:57,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089700670] [2022-01-19 14:07:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089700670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850146831] [2022-01-19 14:07:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:07:57,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:57,231 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:07:57,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 14:07:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:07:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:57,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850146831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:57,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:57,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:07:57,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793159955] [2022-01-19 14:07:57,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:57,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:07:57,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:07:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:07:57,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:07:57,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2226 transitions, 58861 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:57,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:57,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:07:57,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:07,655 INFO L129 PetriNetUnfolder]: 6368/17596 cut-off events. [2022-01-19 14:08:07,655 INFO L130 PetriNetUnfolder]: For 711572/711572 co-relation queries the response was YES. [2022-01-19 14:08:07,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160161 conditions, 17596 events. 6368/17596 cut-off events. For 711572/711572 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 205659 event pairs, 955 based on Foata normal form. 1/17400 useless extension candidates. Maximal degree in co-relation 159996. Up to 8449 conditions per place. [2022-01-19 14:08:07,920 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1813 selfloop transitions, 407 changer transitions 9/2271 dead transitions. [2022-01-19 14:08:07,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2271 transitions, 64154 flow [2022-01-19 14:08:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 14:08:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 14:08:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-01-19 14:08:07,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-01-19 14:08:07,922 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-01-19 14:08:07,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-01-19 14:08:07,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:07,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-01-19 14:08:07,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:07,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:07,925 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:07,925 INFO L186 Difference]: Start difference. First operand has 611 places, 2226 transitions, 58861 flow. Second operand 16 states and 924 transitions. [2022-01-19 14:08:07,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2271 transitions, 64154 flow [2022-01-19 14:08:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2271 transitions, 62513 flow, removed 128 selfloop flow, removed 47 redundant places. [2022-01-19 14:08:16,690 INFO L242 Difference]: Finished difference. Result has 583 places, 2240 transitions, 58592 flow [2022-01-19 14:08:16,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=57235, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=58592, PETRI_PLACES=583, PETRI_TRANSITIONS=2240} [2022-01-19 14:08:16,692 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 515 predicate places. [2022-01-19 14:08:16,692 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 2240 transitions, 58592 flow [2022-01-19 14:08:16,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:16,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:16,693 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] [2022-01-19 14:08:16,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 14:08:16,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:16,894 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash 339136801, now seen corresponding path program 14 times [2022-01-19 14:08:16,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93462268] [2022-01-19 14:08:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:16,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:16,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93462268] [2022-01-19 14:08:16,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93462268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686771863] [2022-01-19 14:08:16,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:08:16,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:16,955 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:08:16,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 14:08:17,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:08:17,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:08:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:08:17,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686771863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:17,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:17,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:08:17,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037749406] [2022-01-19 14:08:17,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:08:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:08:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:08:17,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:08:17,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2240 transitions, 58592 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:17,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:17,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:08:17,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:28,011 INFO L129 PetriNetUnfolder]: 6406/17823 cut-off events. [2022-01-19 14:08:28,012 INFO L130 PetriNetUnfolder]: For 708401/708401 co-relation queries the response was YES. [2022-01-19 14:08:28,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160563 conditions, 17823 events. 6406/17823 cut-off events. For 708401/708401 co-relation queries the response was YES. Maximal size of possible extension queue 1213. Compared 208863 event pairs, 698 based on Foata normal form. 4/17650 useless extension candidates. Maximal degree in co-relation 160164. Up to 5201 conditions per place. [2022-01-19 14:08:28,279 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1501 selfloop transitions, 881 changer transitions 20/2444 dead transitions. [2022-01-19 14:08:28,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 2444 transitions, 67162 flow [2022-01-19 14:08:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-19 14:08:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-01-19 14:08:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3254 transitions. [2022-01-19 14:08:28,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7546382189239332 [2022-01-19 14:08:28,282 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3254 transitions. [2022-01-19 14:08:28,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3254 transitions. [2022-01-19 14:08:28,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:28,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3254 transitions. [2022-01-19 14:08:28,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 58.107142857142854) internal successors, (3254), 56 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:28,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:28,288 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:28,289 INFO L186 Difference]: Start difference. First operand has 583 places, 2240 transitions, 58592 flow. Second operand 56 states and 3254 transitions. [2022-01-19 14:08:28,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 2444 transitions, 67162 flow [2022-01-19 14:08:36,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 2444 transitions, 66706 flow, removed 92 selfloop flow, removed 7 redundant places. [2022-01-19 14:08:36,890 INFO L242 Difference]: Finished difference. Result has 638 places, 2295 transitions, 61914 flow [2022-01-19 14:08:36,892 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=58276, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=61914, PETRI_PLACES=638, PETRI_TRANSITIONS=2295} [2022-01-19 14:08:36,892 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 570 predicate places. [2022-01-19 14:08:36,892 INFO L470 AbstractCegarLoop]: Abstraction has has 638 places, 2295 transitions, 61914 flow [2022-01-19 14:08:36,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:36,893 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:36,893 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] [2022-01-19 14:08:36,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 14:08:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:37,094 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 617201733, now seen corresponding path program 15 times [2022-01-19 14:08:37,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581006906] [2022-01-19 14:08:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:37,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:37,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581006906] [2022-01-19 14:08:37,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581006906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005216653] [2022-01-19 14:08:37,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:08:37,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:37,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:37,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:08:37,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 14:08:37,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 14:08:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:08:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:37,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:37,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005216653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:37,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:37,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:08:37,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696916433] [2022-01-19 14:08:37,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:37,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:08:37,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:08:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:08:37,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:08:37,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2295 transitions, 61914 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:37,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:37,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:08:37,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:49,815 INFO L129 PetriNetUnfolder]: 7177/20000 cut-off events. [2022-01-19 14:08:49,816 INFO L130 PetriNetUnfolder]: For 876012/876012 co-relation queries the response was YES. [2022-01-19 14:08:50,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186455 conditions, 20000 events. 7177/20000 cut-off events. For 876012/876012 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 239019 event pairs, 1065 based on Foata normal form. 4/19773 useless extension candidates. Maximal degree in co-relation 185993. Up to 7493 conditions per place. [2022-01-19 14:08:50,150 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1956 selfloop transitions, 724 changer transitions 17/2739 dead transitions. [2022-01-19 14:08:50,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2739 transitions, 77619 flow [2022-01-19 14:08:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 14:08:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 14:08:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2607 transitions. [2022-01-19 14:08:50,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2022-01-19 14:08:50,153 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2607 transitions. [2022-01-19 14:08:50,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2607 transitions. [2022-01-19 14:08:50,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:50,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2607 transitions. [2022-01-19 14:08:50,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.93333333333333) internal successors, (2607), 45 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:50,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:50,159 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:50,159 INFO L186 Difference]: Start difference. First operand has 638 places, 2295 transitions, 61914 flow. Second operand 45 states and 2607 transitions. [2022-01-19 14:08:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2739 transitions, 77619 flow [2022-01-19 14:09:02,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2739 transitions, 75662 flow, removed 215 selfloop flow, removed 31 redundant places. [2022-01-19 14:09:02,059 INFO L242 Difference]: Finished difference. Result has 666 places, 2438 transitions, 66686 flow [2022-01-19 14:09:02,060 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=60340, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=66686, PETRI_PLACES=666, PETRI_TRANSITIONS=2438} [2022-01-19 14:09:02,060 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 598 predicate places. [2022-01-19 14:09:02,061 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 2438 transitions, 66686 flow [2022-01-19 14:09:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:02,061 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:02,061 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] [2022-01-19 14:09:02,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 14:09:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:02,262 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1816268871, now seen corresponding path program 16 times [2022-01-19 14:09:02,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:02,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873927895] [2022-01-19 14:09:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:02,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:02,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873927895] [2022-01-19 14:09:02,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873927895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561025723] [2022-01-19 14:09:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:09:02,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:02,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:02,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 14:09:02,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:09:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:09:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:09:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:02,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:02,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561025723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:02,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:02,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:09:02,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016323024] [2022-01-19 14:09:02,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:02,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:09:02,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:09:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:09:02,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:09:02,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2438 transitions, 66686 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:02,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:02,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:09:02,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:09:20,420 INFO L129 PetriNetUnfolder]: 9033/24951 cut-off events. [2022-01-19 14:09:20,421 INFO L130 PetriNetUnfolder]: For 1173886/1173886 co-relation queries the response was YES. [2022-01-19 14:09:21,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235337 conditions, 24951 events. 9033/24951 cut-off events. For 1173886/1173886 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 308322 event pairs, 1077 based on Foata normal form. 4/24724 useless extension candidates. Maximal degree in co-relation 234860. Up to 7844 conditions per place. [2022-01-19 14:09:21,355 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1940 selfloop transitions, 1296 changer transitions 11/3289 dead transitions. [2022-01-19 14:09:21,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 3289 transitions, 94651 flow [2022-01-19 14:09:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:09:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:09:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4006 transitions. [2022-01-19 14:09:21,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432282003710575 [2022-01-19 14:09:21,359 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4006 transitions. [2022-01-19 14:09:21,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4006 transitions. [2022-01-19 14:09:21,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:09:21,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4006 transitions. [2022-01-19 14:09:21,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.22857142857143) internal successors, (4006), 70 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:21,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:21,370 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:21,370 INFO L186 Difference]: Start difference. First operand has 666 places, 2438 transitions, 66686 flow. Second operand 70 states and 4006 transitions. [2022-01-19 14:09:21,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 3289 transitions, 94651 flow [2022-01-19 14:09:40,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 3289 transitions, 94037 flow, removed 187 selfloop flow, removed 12 redundant places. [2022-01-19 14:09:40,066 INFO L242 Difference]: Finished difference. Result has 754 places, 2969 transitions, 85512 flow [2022-01-19 14:09:40,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=66202, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=85512, PETRI_PLACES=754, PETRI_TRANSITIONS=2969} [2022-01-19 14:09:40,068 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 686 predicate places. [2022-01-19 14:09:40,068 INFO L470 AbstractCegarLoop]: Abstraction has has 754 places, 2969 transitions, 85512 flow [2022-01-19 14:09:40,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:40,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:40,069 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] [2022-01-19 14:09:40,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 14:09:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:40,269 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1462038993, now seen corresponding path program 17 times [2022-01-19 14:09:40,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:40,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221196299] [2022-01-19 14:09:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:40,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221196299] [2022-01-19 14:09:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221196299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458692100] [2022-01-19 14:09:40,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:09:40,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:40,331 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:40,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 14:09:40,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 14:09:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:09:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:09:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:40,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:40,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458692100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:40,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:40,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:09:40,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927288949] [2022-01-19 14:09:40,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:40,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:09:40,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:09:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:09:40,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:09:40,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 2969 transitions, 85512 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:40,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:40,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:09:40,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:10:01,575 INFO L129 PetriNetUnfolder]: 9375/26060 cut-off events. [2022-01-19 14:10:01,575 INFO L130 PetriNetUnfolder]: For 1390331/1390331 co-relation queries the response was YES. [2022-01-19 14:10:02,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258164 conditions, 26060 events. 9375/26060 cut-off events. For 1390331/1390331 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 322666 event pairs, 852 based on Foata normal form. 4/25841 useless extension candidates. Maximal degree in co-relation 257750. Up to 6346 conditions per place. [2022-01-19 14:10:02,156 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1731 selfloop transitions, 1549 changer transitions 16/3338 dead transitions. [2022-01-19 14:10:02,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 3338 transitions, 100017 flow [2022-01-19 14:10:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 14:10:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 14:10:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3869 transitions. [2022-01-19 14:10:02,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7499515409963171 [2022-01-19 14:10:02,159 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3869 transitions. [2022-01-19 14:10:02,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3869 transitions. [2022-01-19 14:10:02,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:10:02,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3869 transitions. [2022-01-19 14:10:02,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.74626865671642) internal successors, (3869), 67 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:02,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:02,165 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:02,165 INFO L186 Difference]: Start difference. First operand has 754 places, 2969 transitions, 85512 flow. Second operand 67 states and 3869 transitions. [2022-01-19 14:10:02,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 3338 transitions, 100017 flow [2022-01-19 14:10:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 3338 transitions, 98882 flow, removed 374 selfloop flow, removed 20 redundant places. [2022-01-19 14:10:26,817 INFO L242 Difference]: Finished difference. Result has 822 places, 3127 transitions, 93897 flow [2022-01-19 14:10:26,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=84544, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=93897, PETRI_PLACES=822, PETRI_TRANSITIONS=3127} [2022-01-19 14:10:26,819 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 754 predicate places. [2022-01-19 14:10:26,819 INFO L470 AbstractCegarLoop]: Abstraction has has 822 places, 3127 transitions, 93897 flow [2022-01-19 14:10:26,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:26,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:10:26,820 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] [2022-01-19 14:10:26,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 14:10:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 14:10:27,027 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:10:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:10:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1014756949, now seen corresponding path program 18 times [2022-01-19 14:10:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:10:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305940908] [2022-01-19 14:10:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:10:27,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:10:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:10:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:27,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:10:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305940908] [2022-01-19 14:10:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305940908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:10:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140591454] [2022-01-19 14:10:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:10:27,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:10:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:10:27,092 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:10:27,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 14:10:27,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:10:27,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:10:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:10:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:10:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:27,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:10:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140591454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:10:27,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:10:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:10:27,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164235646] [2022-01-19 14:10:27,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:10:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:10:27,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:10:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:10:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:10:27,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:10:27,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 3127 transitions, 93897 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:27,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:10:27,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:10:27,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:10:51,406 INFO L129 PetriNetUnfolder]: 9907/27925 cut-off events. [2022-01-19 14:10:51,406 INFO L130 PetriNetUnfolder]: For 1647360/1647360 co-relation queries the response was YES. [2022-01-19 14:10:51,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285090 conditions, 27925 events. 9907/27925 cut-off events. For 1647360/1647360 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 351322 event pairs, 1470 based on Foata normal form. 9/27671 useless extension candidates. Maximal degree in co-relation 284866. Up to 11761 conditions per place. [2022-01-19 14:10:52,086 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2473 selfloop transitions, 936 changer transitions 12/3463 dead transitions. [2022-01-19 14:10:52,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 3463 transitions, 108666 flow [2022-01-19 14:10:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 14:10:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 14:10:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3622 transitions. [2022-01-19 14:10:52,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7466501752216038 [2022-01-19 14:10:52,089 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3622 transitions. [2022-01-19 14:10:52,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3622 transitions. [2022-01-19 14:10:52,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:10:52,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3622 transitions. [2022-01-19 14:10:52,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.492063492063494) internal successors, (3622), 63 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:52,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:52,238 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:52,238 INFO L186 Difference]: Start difference. First operand has 822 places, 3127 transitions, 93897 flow. Second operand 63 states and 3622 transitions. [2022-01-19 14:10:52,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 3463 transitions, 108666 flow [2022-01-19 14:11:21,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 3463 transitions, 108001 flow, removed 160 selfloop flow, removed 27 redundant places. [2022-01-19 14:11:21,158 INFO L242 Difference]: Finished difference. Result has 871 places, 3298 transitions, 100701 flow [2022-01-19 14:11:21,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=93236, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=100701, PETRI_PLACES=871, PETRI_TRANSITIONS=3298} [2022-01-19 14:11:21,161 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 803 predicate places. [2022-01-19 14:11:21,161 INFO L470 AbstractCegarLoop]: Abstraction has has 871 places, 3298 transitions, 100701 flow [2022-01-19 14:11:21,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:21,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:11:21,161 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] [2022-01-19 14:11:21,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-19 14:11:21,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-19 14:11:21,362 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:11:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:11:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 523862579, now seen corresponding path program 19 times [2022-01-19 14:11:21,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:11:21,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483590733] [2022-01-19 14:11:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:11:21,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:11:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:11:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:21,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:11:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483590733] [2022-01-19 14:11:21,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483590733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:11:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207000998] [2022-01-19 14:11:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:11:21,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:11:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:11:21,462 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:11:21,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 14:11:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:11:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:11:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:11:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:21,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:11:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:21,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207000998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:11:21,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:11:21,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 14:11:21,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056115346] [2022-01-19 14:11:21,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:11:21,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 14:11:21,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:11:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 14:11:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 14:11:21,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:11:21,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 3298 transitions, 100701 flow. Second operand has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:21,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:11:21,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:11:21,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:11:49,179 INFO L129 PetriNetUnfolder]: 10358/29165 cut-off events. [2022-01-19 14:11:49,179 INFO L130 PetriNetUnfolder]: For 2132370/2132370 co-relation queries the response was YES. [2022-01-19 14:11:50,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309754 conditions, 29165 events. 10358/29165 cut-off events. For 2132370/2132370 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 368862 event pairs, 1183 based on Foata normal form. 106/29005 useless extension candidates. Maximal degree in co-relation 309409. Up to 9821 conditions per place. [2022-01-19 14:11:50,197 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2081 selfloop transitions, 1478 changer transitions 5/3606 dead transitions. [2022-01-19 14:11:50,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 3606 transitions, 115192 flow [2022-01-19 14:11:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 14:11:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 14:11:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1965 transitions. [2022-01-19 14:11:50,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733175914994097 [2022-01-19 14:11:50,199 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1965 transitions. [2022-01-19 14:11:50,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1965 transitions. [2022-01-19 14:11:50,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:11:50,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1965 transitions. [2022-01-19 14:11:50,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.54545454545455) internal successors, (1965), 33 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:50,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:50,203 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:50,204 INFO L186 Difference]: Start difference. First operand has 871 places, 3298 transitions, 100701 flow. Second operand 33 states and 1965 transitions. [2022-01-19 14:11:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 3606 transitions, 115192 flow [2022-01-19 14:12:24,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 3606 transitions, 112585 flow, removed 1053 selfloop flow, removed 3 redundant places. [2022-01-19 14:12:24,700 INFO L242 Difference]: Finished difference. Result has 919 places, 3420 transitions, 107966 flow [2022-01-19 14:12:24,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=98874, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=107966, PETRI_PLACES=919, PETRI_TRANSITIONS=3420} [2022-01-19 14:12:24,703 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 851 predicate places. [2022-01-19 14:12:24,703 INFO L470 AbstractCegarLoop]: Abstraction has has 919 places, 3420 transitions, 107966 flow [2022-01-19 14:12:24,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:24,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:12:24,703 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] [2022-01-19 14:12:24,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 14:12:24,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 14:12:24,904 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:12:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:12:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -701734391, now seen corresponding path program 20 times [2022-01-19 14:12:24,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:12:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10316173] [2022-01-19 14:12:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:12:24,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:12:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:12:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:12:24,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:12:24,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10316173] [2022-01-19 14:12:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10316173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:12:24,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562274567] [2022-01-19 14:12:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:12:24,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:12:24,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:12:24,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:12:24,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 14:12:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:12:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:12:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:12:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:12:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:12:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:12:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:12:25,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562274567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:12:25,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:12:25,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:12:25,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953634070] [2022-01-19 14:12:25,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:12:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:12:25,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:12:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:12:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:12:25,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:12:25,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 3420 transitions, 107966 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:25,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:12:25,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:12:25,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:12:57,631 INFO L129 PetriNetUnfolder]: 10968/30802 cut-off events. [2022-01-19 14:12:57,631 INFO L130 PetriNetUnfolder]: For 2479850/2479850 co-relation queries the response was YES. [2022-01-19 14:12:58,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340204 conditions, 30802 events. 10968/30802 cut-off events. For 2479850/2479850 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 392698 event pairs, 964 based on Foata normal form. 60/30795 useless extension candidates. Maximal degree in co-relation 339839. Up to 9318 conditions per place. [2022-01-19 14:12:58,653 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2109 selfloop transitions, 1650 changer transitions 12/3813 dead transitions. [2022-01-19 14:12:58,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 3813 transitions, 124584 flow [2022-01-19 14:12:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 14:12:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 14:12:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2725 transitions. [2022-01-19 14:12:58,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.769339356295878 [2022-01-19 14:12:58,656 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2725 transitions. [2022-01-19 14:12:58,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2725 transitions. [2022-01-19 14:12:58,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:12:58,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2725 transitions. [2022-01-19 14:12:58,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.23913043478261) internal successors, (2725), 46 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:58,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:58,662 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:58,662 INFO L186 Difference]: Start difference. First operand has 919 places, 3420 transitions, 107966 flow. Second operand 46 states and 2725 transitions. [2022-01-19 14:12:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 3813 transitions, 124584 flow [2022-01-19 14:13:39,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 3813 transitions, 124342 flow, removed 88 selfloop flow, removed 4 redundant places. [2022-01-19 14:13:39,473 INFO L242 Difference]: Finished difference. Result has 984 places, 3576 transitions, 118955 flow [2022-01-19 14:13:39,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=107768, PETRI_DIFFERENCE_MINUEND_PLACES=915, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=118955, PETRI_PLACES=984, PETRI_TRANSITIONS=3576} [2022-01-19 14:13:39,475 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 916 predicate places. [2022-01-19 14:13:39,475 INFO L470 AbstractCegarLoop]: Abstraction has has 984 places, 3576 transitions, 118955 flow [2022-01-19 14:13:39,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:39,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:13:39,476 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] [2022-01-19 14:13:39,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 14:13:39,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:13:39,676 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:13:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:13:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2009021095, now seen corresponding path program 21 times [2022-01-19 14:13:39,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:13:39,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300736234] [2022-01-19 14:13:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:13:39,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:13:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:13:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:13:39,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:13:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300736234] [2022-01-19 14:13:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300736234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:13:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467568923] [2022-01-19 14:13:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:13:39,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:13:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:13:39,736 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:13:39,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 14:13:39,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:13:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:13:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:13:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:13:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:13:39,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:13:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:13:40,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467568923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:13:40,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:13:40,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:13:40,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657745544] [2022-01-19 14:13:40,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:13:40,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:13:40,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:13:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:13:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:13:40,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:13:40,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 3576 transitions, 118955 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:40,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:13:40,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:13:40,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:14:15,957 INFO L129 PetriNetUnfolder]: 12031/33380 cut-off events. [2022-01-19 14:14:15,957 INFO L130 PetriNetUnfolder]: For 3140159/3140159 co-relation queries the response was YES. [2022-01-19 14:14:17,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392520 conditions, 33380 events. 12031/33380 cut-off events. For 3140159/3140159 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 426713 event pairs, 1318 based on Foata normal form. 62/33172 useless extension candidates. Maximal degree in co-relation 392131. Up to 10661 conditions per place. [2022-01-19 14:14:17,373 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2207 selfloop transitions, 1838 changer transitions 10/4097 dead transitions. [2022-01-19 14:14:17,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1033 places, 4097 transitions, 141372 flow [2022-01-19 14:14:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 14:14:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 14:14:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2988 transitions. [2022-01-19 14:14:17,376 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7608861726508785 [2022-01-19 14:14:17,376 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2988 transitions. [2022-01-19 14:14:17,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2988 transitions. [2022-01-19 14:14:17,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:14:17,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2988 transitions. [2022-01-19 14:14:17,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.588235294117645) internal successors, (2988), 51 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:17,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:17,383 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:17,383 INFO L186 Difference]: Start difference. First operand has 984 places, 3576 transitions, 118955 flow. Second operand 51 states and 2988 transitions. [2022-01-19 14:14:17,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1033 places, 4097 transitions, 141372 flow [2022-01-19 14:15:11,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 4097 transitions, 140683 flow, removed 143 selfloop flow, removed 9 redundant places. [2022-01-19 14:15:11,537 INFO L242 Difference]: Finished difference. Result has 1050 places, 3872 transitions, 135194 flow [2022-01-19 14:15:11,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=118328, PETRI_DIFFERENCE_MINUEND_PLACES=974, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=135194, PETRI_PLACES=1050, PETRI_TRANSITIONS=3872} [2022-01-19 14:15:11,544 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 982 predicate places. [2022-01-19 14:15:11,544 INFO L470 AbstractCegarLoop]: Abstraction has has 1050 places, 3872 transitions, 135194 flow [2022-01-19 14:15:11,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:11,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:15:11,544 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] [2022-01-19 14:15:11,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 14:15:11,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 14:15:11,751 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:15:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:15:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1745473187, now seen corresponding path program 22 times [2022-01-19 14:15:11,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:15:11,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153816138] [2022-01-19 14:15:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:15:11,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:15:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:15:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:11,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:15:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153816138] [2022-01-19 14:15:11,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153816138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:15:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977794791] [2022-01-19 14:15:11,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:15:11,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:15:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:15:11,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:15:11,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 14:15:11,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:15:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:15:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:15:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:15:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:12,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:15:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:15:12,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977794791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:15:12,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:15:12,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:15:12,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724908308] [2022-01-19 14:15:12,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:15:12,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:15:12,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:15:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:15:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:15:12,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:15:12,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:12,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:15:12,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:15:12,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:15:56,652 INFO L129 PetriNetUnfolder]: 13269/36573 cut-off events. [2022-01-19 14:15:56,653 INFO L130 PetriNetUnfolder]: For 3878537/3878537 co-relation queries the response was YES. [2022-01-19 14:15:58,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455109 conditions, 36573 events. 13269/36573 cut-off events. For 3878537/3878537 co-relation queries the response was YES. Maximal size of possible extension queue 2502. Compared 472333 event pairs, 1496 based on Foata normal form. 30/36288 useless extension candidates. Maximal degree in co-relation 454697. Up to 12185 conditions per place. [2022-01-19 14:15:58,689 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2414 selfloop transitions, 1958 changer transitions 15/4429 dead transitions. [2022-01-19 14:15:58,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1087 places, 4429 transitions, 162133 flow [2022-01-19 14:15:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 14:15:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 14:15:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2213 transitions. [2022-01-19 14:15:58,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7563226247436774 [2022-01-19 14:15:58,691 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2213 transitions. [2022-01-19 14:15:58,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2213 transitions. [2022-01-19 14:15:58,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:15:58,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2213 transitions. [2022-01-19 14:15:58,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 58.23684210526316) internal successors, (2213), 38 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:58,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:58,695 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:58,695 INFO L186 Difference]: Start difference. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand 38 states and 2213 transitions. [2022-01-19 14:15:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1087 places, 4429 transitions, 162133 flow [2022-01-19 14:17:15,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 4429 transitions, 160943 flow, removed 467 selfloop flow, removed 4 redundant places. [2022-01-19 14:17:15,279 INFO L242 Difference]: Finished difference. Result has 1103 places, 4224 transitions, 155977 flow [2022-01-19 14:17:15,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=134334, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=155977, PETRI_PLACES=1103, PETRI_TRANSITIONS=4224} [2022-01-19 14:17:15,282 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1035 predicate places. [2022-01-19 14:17:15,282 INFO L470 AbstractCegarLoop]: Abstraction has has 1103 places, 4224 transitions, 155977 flow [2022-01-19 14:17:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:15,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:17:15,283 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] [2022-01-19 14:17:15,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 14:17:15,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 14:17:15,491 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:17:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:17:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1552593637, now seen corresponding path program 23 times [2022-01-19 14:17:15,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:17:15,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456672568] [2022-01-19 14:17:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:17:15,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:17:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:17:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:17:15,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:17:15,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456672568] [2022-01-19 14:17:15,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456672568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:17:15,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696277516] [2022-01-19 14:17:15,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:17:15,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:17:15,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:17:15,565 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:17:15,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 14:17:15,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:17:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:17:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:17:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:17:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:17:15,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:17:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:17:15,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696277516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:17:15,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:17:15,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:17:15,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788629941] [2022-01-19 14:17:15,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:17:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:17:15,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:17:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:17:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:17:15,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:17:15,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:15,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:17:15,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:17:15,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:18:07,501 INFO L129 PetriNetUnfolder]: 13574/37410 cut-off events. [2022-01-19 14:18:07,502 INFO L130 PetriNetUnfolder]: For 4554784/4554784 co-relation queries the response was YES. [2022-01-19 14:18:10,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487640 conditions, 37410 events. 13574/37410 cut-off events. For 4554784/4554784 co-relation queries the response was YES. Maximal size of possible extension queue 2580. Compared 484165 event pairs, 1125 based on Foata normal form. 60/37382 useless extension candidates. Maximal degree in co-relation 487272. Up to 9760 conditions per place. [2022-01-19 14:18:10,286 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2165 selfloop transitions, 2271 changer transitions 18/4496 dead transitions. [2022-01-19 14:18:10,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1146 places, 4496 transitions, 172864 flow [2022-01-19 14:18:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 14:18:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 14:18:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2846 transitions. [2022-01-19 14:18:10,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7543069175722237 [2022-01-19 14:18:10,289 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2846 transitions. [2022-01-19 14:18:10,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2846 transitions. [2022-01-19 14:18:10,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:18:10,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2846 transitions. [2022-01-19 14:18:10,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.08163265306123) internal successors, (2846), 49 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:10,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:10,295 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:10,295 INFO L186 Difference]: Start difference. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand 49 states and 2846 transitions. [2022-01-19 14:18:10,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1146 places, 4496 transitions, 172864 flow [2022-01-19 14:19:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1134 places, 4496 transitions, 172009 flow, removed 212 selfloop flow, removed 12 redundant places. [2022-01-19 14:19:34,218 INFO L242 Difference]: Finished difference. Result has 1150 places, 4317 transitions, 167339 flow [2022-01-19 14:19:34,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=154935, PETRI_DIFFERENCE_MINUEND_PLACES=1086, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=167339, PETRI_PLACES=1150, PETRI_TRANSITIONS=4317} [2022-01-19 14:19:34,222 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1082 predicate places. [2022-01-19 14:19:34,222 INFO L470 AbstractCegarLoop]: Abstraction has has 1150 places, 4317 transitions, 167339 flow [2022-01-19 14:19:34,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:19:34,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:19:34,223 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] [2022-01-19 14:19:34,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 14:19:34,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:19:34,439 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:19:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:19:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1442077163, now seen corresponding path program 24 times [2022-01-19 14:19:34,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:19:34,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018439180] [2022-01-19 14:19:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:19:34,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:19:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:19:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:19:34,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:19:34,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018439180] [2022-01-19 14:19:34,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018439180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:19:34,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193140859] [2022-01-19 14:19:34,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:19:34,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:19:34,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:19:34,498 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:19:34,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 14:19:34,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:19:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:19:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:19:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:19:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:19:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:19:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:19:34,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193140859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:19:34,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:19:34,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 14:19:34,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533410694] [2022-01-19 14:19:34,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:19:34,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:19:34,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:19:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:19:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:19:34,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 14:19:34,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1150 places, 4317 transitions, 167339 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:19:34,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:19:34,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 14:19:34,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 14:20:03,007 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:20:03,007 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:20:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 14:20:03,379 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:20:03,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-19 14:20:03,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:20:03,582 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 258979 conditions, 17071 events (6504/17070 cut-off events. For 2443336/2443336 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 219621 event pairs, 1019 based on Foata normal form. 4/19358 useless extension candidates. Maximal degree in co-relation 258647. Up to 9550 conditions per place.). [2022-01-19 14:20:03,583 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:20:03,583 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:20:03,586 INFO L732 BasicCegarLoop]: Path program histogram: [24, 6, 1] [2022-01-19 14:20:03,588 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:20:03,588 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:20:03,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:20:03 BasicIcfg [2022-01-19 14:20:03,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:20:03,590 INFO L158 Benchmark]: Toolchain (without parser) took 807635.26ms. Allocated memory was 421.5MB in the beginning and 13.3GB in the end (delta: 12.9GB). Free memory was 367.4MB in the beginning and 9.4GB in the end (delta: -9.1GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2022-01-19 14:20:03,590 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 421.5MB. Free memory is still 384.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:20:03,591 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.28ms. Allocated memory was 421.5MB in the beginning and 526.4MB in the end (delta: 104.9MB). Free memory was 367.2MB in the beginning and 500.3MB in the end (delta: -133.1MB). Peak memory consumption was 6.5MB. Max. memory is 16.0GB. [2022-01-19 14:20:03,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.38ms. Allocated memory is still 526.4MB. Free memory was 500.3MB in the beginning and 498.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:20:03,591 INFO L158 Benchmark]: Boogie Preprocessor took 17.51ms. Allocated memory is still 526.4MB. Free memory was 498.8MB in the beginning and 497.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:20:03,591 INFO L158 Benchmark]: RCFGBuilder took 270.08ms. Allocated memory is still 526.4MB. Free memory was 497.6MB in the beginning and 484.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 14:20:03,592 INFO L158 Benchmark]: TraceAbstraction took 807082.60ms. Allocated memory was 526.4MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 484.1MB in the beginning and 9.4GB in the end (delta: -9.0GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2022-01-19 14:20:03,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 421.5MB. Free memory is still 384.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 235.28ms. Allocated memory was 421.5MB in the beginning and 526.4MB in the end (delta: 104.9MB). Free memory was 367.2MB in the beginning and 500.3MB in the end (delta: -133.1MB). Peak memory consumption was 6.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.38ms. Allocated memory is still 526.4MB. Free memory was 500.3MB in the beginning and 498.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.51ms. Allocated memory is still 526.4MB. Free memory was 498.8MB in the beginning and 497.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 270.08ms. Allocated memory is still 526.4MB. Free memory was 497.6MB in the beginning and 484.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 807082.60ms. Allocated memory was 526.4MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 484.1MB in the beginning and 9.4GB in the end (delta: -9.0GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 258979 conditions, 17071 events (6504/17070 cut-off events. For 2443336/2443336 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 219621 event pairs, 1019 based on Foata normal form. 4/19358 useless extension candidates. Maximal degree in co-relation 258647. Up to 9550 conditions per place.). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 258979 conditions, 17071 events (6504/17070 cut-off events. For 2443336/2443336 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 219621 event pairs, 1019 based on Foata normal form. 4/19358 useless extension candidates. Maximal degree in co-relation 258647. Up to 9550 conditions per place.). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 258979 conditions, 17071 events (6504/17070 cut-off events. For 2443336/2443336 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 219621 event pairs, 1019 based on Foata normal form. 4/19358 useless extension candidates. Maximal degree in co-relation 258647. Up to 9550 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 807.0s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 789.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5593 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5593 mSDsluCounter, 4042 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7336 mSDsCounter, 1284 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16264 IncrementalHoareTripleChecker+Invalid, 17548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1284 mSolverCounterUnsat, 707 mSDtfsCounter, 16264 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4738 GetRequests, 3297 SyntacticMatches, 31 SemanticMatches, 1410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28130 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167339occurred in iteration=30, InterpolantAutomatonStates: 1166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 3771 NumberOfCodeBlocks, 3741 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 5460 ConstructedInterpolants, 0 QuantifiedInterpolants, 11814 SizeOfPredicates, 198 NumberOfNonLiveVariables, 4124 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 85 InterpolantComputations, 4 PerfectInterpolantSequences, 276/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown