/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:16:27,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:16:27,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:16:27,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:16:27,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:16:27,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:16:27,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:16:27,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:16:27,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:16:27,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:16:27,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:16:27,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:16:27,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:16:27,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:16:27,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:16:27,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:16:27,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:16:27,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:16:27,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:16:27,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:16:27,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:16:27,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:16:27,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:16:27,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:16:27,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:16:27,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:16:27,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:16:27,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:16:27,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:16:27,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:16:27,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:16:27,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:16:27,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:16:27,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:16:27,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:16:27,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:16:27,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:16:27,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:16:27,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:16:27,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:16:27,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:16:27,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:16:27,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:16:27,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:16:27,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:16:27,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:16:27,294 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:16:27,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:16:27,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:16:27,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:16:27,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:16:27,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:16:27,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:16:27,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:16:27,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:16:27,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:16:27,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:16:27,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:16:27,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:16:27,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:16:27,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:16:27,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:16:27,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:16:27,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:16:27,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:16:27,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:16:27,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:16:27,300 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:16:27,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:16:27,300 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:16:27,300 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:16:27,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:16:27,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:16:27,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:16:27,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:16:27,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:16:27,601 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:16:27,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-09 14:16:27,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de18b18ba/f1481d2bd92549baa007e13f7ec8bf66/FLAG5efe0f5a8 [2020-10-09 14:16:28,198 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:16:28,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-09 14:16:28,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de18b18ba/f1481d2bd92549baa007e13f7ec8bf66/FLAG5efe0f5a8 [2020-10-09 14:16:28,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de18b18ba/f1481d2bd92549baa007e13f7ec8bf66 [2020-10-09 14:16:28,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:16:28,435 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:16:28,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:28,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:16:28,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:16:28,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:28" (1/1) ... [2020-10-09 14:16:28,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e313fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:28, skipping insertion in model container [2020-10-09 14:16:28,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:28" (1/1) ... [2020-10-09 14:16:28,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:16:28,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:16:28,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:28,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:16:29,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:29,091 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:16:29,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29 WrapperNode [2020-10-09 14:16:29,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:29,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:29,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:16:29,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:16:29,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:29,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:16:29,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:16:29,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:16:29,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:16:29,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:16:29,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:16:29,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:16:29,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:16:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:16:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:16:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:16:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:16:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:16:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:16:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:16:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:16:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:16:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:16:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:16:29,243 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:16:29,553 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:16:29,554 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:16:29,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:29 BoogieIcfgContainer [2020-10-09 14:16:29,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:16:29,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:16:29,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:16:29,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:16:29,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:16:28" (1/3) ... [2020-10-09 14:16:29,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64994055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:29, skipping insertion in model container [2020-10-09 14:16:29,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29" (2/3) ... [2020-10-09 14:16:29,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64994055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:29, skipping insertion in model container [2020-10-09 14:16:29,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:29" (3/3) ... [2020-10-09 14:16:29,564 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-09 14:16:29,575 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:16:29,581 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:16:29,583 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:16:29,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,626 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,631 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,632 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,632 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,633 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,633 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:29,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:16:29,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:16:29,668 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:16:29,668 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:16:29,668 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:16:29,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:16:29,669 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:16:29,669 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:16:29,669 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:16:29,681 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:29,719 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 14:16:29,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:29,726 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-09 14:16:29,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 14:16:29,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 116 flow [2020-10-09 14:16:29,747 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2020-10-09 14:16:29,747 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:29,748 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:29,749 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:29,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:29,755 INFO L82 PathProgramCache]: Analyzing trace with hash -229509324, now seen corresponding path program 1 times [2020-10-09 14:16:29,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:29,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931514239] [2020-10-09 14:16:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:16:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:29,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:29,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:30,041 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931514239] [2020-10-09 14:16:30,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:30,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:16:30,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109601654] [2020-10-09 14:16:30,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:16:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:16:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:16:30,273 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:30,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 116 flow. Second operand 9 states. [2020-10-09 14:16:30,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:30,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:30,278 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:30,708 INFO L129 PetriNetUnfolder]: 84/383 cut-off events. [2020-10-09 14:16:30,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:30,712 INFO L80 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 383 events. 84/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2262 event pairs, 0 based on Foata normal form. 91/433 useless extension candidates. Maximal degree in co-relation 501. Up to 47 conditions per place. [2020-10-09 14:16:30,716 INFO L132 encePairwiseOnDemand]: 46/57 looper letters, 16 selfloop transitions, 23 changer transitions 43/118 dead transitions. [2020-10-09 14:16:30,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 14:16:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-09 14:16:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1119 transitions. [2020-10-09 14:16:30,739 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8923444976076556 [2020-10-09 14:16:30,740 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:30,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1119 transitions. [2020-10-09 14:16:30,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-09 14:16:30,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-09 14:16:30,764 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-09 14:16:30,767 INFO L185 Difference]: Start difference. First operand has 57 places, 55 transitions, 116 flow. Second operand 22 states and 1119 transitions. [2020-10-09 14:16:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 392 flow [2020-10-09 14:16:30,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:16:30,779 INFO L241 Difference]: Finished difference. Result has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:30,782 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=266, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2020-10-09 14:16:30,783 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2020-10-09 14:16:30,783 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 266 flow [2020-10-09 14:16:30,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:16:30,784 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:30,784 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:30,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:16:30,996 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash 468266528, now seen corresponding path program 1 times [2020-10-09 14:16:30,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:30,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643390757] [2020-10-09 14:16:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:31,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:31,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:31,266 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:31,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643390757] [2020-10-09 14:16:31,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:31,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650190232] [2020-10-09 14:16:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:31,651 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:31,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 266 flow. Second operand 13 states. [2020-10-09 14:16:31,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:31,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:31,652 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:32,432 INFO L129 PetriNetUnfolder]: 91/434 cut-off events. [2020-10-09 14:16:32,433 INFO L130 PetriNetUnfolder]: For 1119/1127 co-relation queries the response was YES. [2020-10-09 14:16:32,437 INFO L80 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 434 events. 91/434 cut-off events. For 1119/1127 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2469 event pairs, 0 based on Foata normal form. 22/407 useless extension candidates. Maximal degree in co-relation 880. Up to 81 conditions per place. [2020-10-09 14:16:32,440 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 21 selfloop transitions, 56 changer transitions 37/150 dead transitions. [2020-10-09 14:16:32,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 14:16:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-09 14:16:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1679 transitions. [2020-10-09 14:16:32,446 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8416040100250627 [2020-10-09 14:16:32,447 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:32,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1679 transitions. [2020-10-09 14:16:32,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-09 14:16:32,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-09 14:16:32,456 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-09 14:16:32,456 INFO L185 Difference]: Start difference. First operand has 94 places, 69 transitions, 266 flow. Second operand 35 states and 1679 transitions. [2020-10-09 14:16:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 978 flow [2020-10-09 14:16:32,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 924 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-09 14:16:32,469 INFO L241 Difference]: Finished difference. Result has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:32,469 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=643, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2020-10-09 14:16:32,470 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2020-10-09 14:16:32,470 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 643 flow [2020-10-09 14:16:32,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:32,470 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:32,470 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:32,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:16:32,681 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1901362848, now seen corresponding path program 2 times [2020-10-09 14:16:32,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:32,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41938090] [2020-10-09 14:16:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:16:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:16:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:32,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:16:32,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:32,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:32,840 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,857 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41938090] [2020-10-09 14:16:32,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:32,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2020-10-09 14:16:32,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128681693] [2020-10-09 14:16:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:16:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:16:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:16:33,043 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:33,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 643 flow. Second operand 13 states. [2020-10-09 14:16:33,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:33,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:33,044 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:34,449 INFO L129 PetriNetUnfolder]: 196/1076 cut-off events. [2020-10-09 14:16:34,449 INFO L130 PetriNetUnfolder]: For 6246/6254 co-relation queries the response was YES. [2020-10-09 14:16:34,459 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2641 conditions, 1076 events. 196/1076 cut-off events. For 6246/6254 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8513 event pairs, 0 based on Foata normal form. 35/997 useless extension candidates. Maximal degree in co-relation 2584. Up to 207 conditions per place. [2020-10-09 14:16:34,466 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 24 selfloop transitions, 160 changer transitions 60/280 dead transitions. [2020-10-09 14:16:34,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 14:16:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 14:16:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2450 transitions. [2020-10-09 14:16:34,476 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8427932576539388 [2020-10-09 14:16:34,476 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:34,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2450 transitions. [2020-10-09 14:16:34,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-09 14:16:34,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-09 14:16:34,492 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-09 14:16:34,492 INFO L185 Difference]: Start difference. First operand has 123 places, 107 transitions, 643 flow. Second operand 51 states and 2450 transitions. [2020-10-09 14:16:34,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 280 transitions, 2673 flow [2020-10-09 14:16:34,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 280 transitions, 2477 flow, removed 74 selfloop flow, removed 20 redundant places. [2020-10-09 14:16:34,554 INFO L241 Difference]: Finished difference. Result has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:34,554 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1814, PETRI_PLACES=172, PETRI_TRANSITIONS=216} [2020-10-09 14:16:34,555 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2020-10-09 14:16:34,555 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 216 transitions, 1814 flow [2020-10-09 14:16:34,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:16:34,555 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:34,556 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2020-10-09 14:16:34,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:16:34,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash 748426656, now seen corresponding path program 1 times [2020-10-09 14:16:34,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:34,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097542282] [2020-10-09 14:16:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:34,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:34,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,056 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,083 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097542282] [2020-10-09 14:16:35,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418912840] [2020-10-09 14:16:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:35,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,445 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,452 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,455 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,460 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095583344] [2020-10-09 14:16:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 14:16:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:35,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:35,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,681 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,684 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,692 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:35,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:35,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 17 [2020-10-09 14:16:35,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370054517] [2020-10-09 14:16:35,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 14:16:35,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 14:16:35,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 14:16:36,167 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:16:36,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 216 transitions, 1814 flow. Second operand 17 states. [2020-10-09 14:16:36,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:36,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:16:36,168 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:39,657 INFO L129 PetriNetUnfolder]: 365/2205 cut-off events. [2020-10-09 14:16:39,657 INFO L130 PetriNetUnfolder]: For 22805/22844 co-relation queries the response was YES. [2020-10-09 14:16:39,678 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 2205 events. 365/2205 cut-off events. For 22805/22844 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 19602 event pairs, 0 based on Foata normal form. 54/2025 useless extension candidates. Maximal degree in co-relation 6010. Up to 402 conditions per place. [2020-10-09 14:16:39,690 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 30 selfloop transitions, 401 changer transitions 77/544 dead transitions. [2020-10-09 14:16:39,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-09 14:16:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 14:16:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3451 transitions. [2020-10-09 14:16:39,699 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408869395711501 [2020-10-09 14:16:39,700 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:39,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3451 transitions. [2020-10-09 14:16:39,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 73 states. [2020-10-09 14:16:39,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 73 states. [2020-10-09 14:16:39,715 INFO L81 ComplementDD]: Finished complementDD. Result 73 states. [2020-10-09 14:16:39,715 INFO L185 Difference]: Start difference. First operand has 172 places, 216 transitions, 1814 flow. Second operand 72 states and 3451 transitions. [2020-10-09 14:16:39,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 544 transitions, 6618 flow [2020-10-09 14:16:39,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 544 transitions, 5666 flow, removed 455 selfloop flow, removed 27 redundant places. [2020-10-09 14:16:39,822 INFO L241 Difference]: Finished difference. Result has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:39,823 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4606, PETRI_PLACES=236, PETRI_TRANSITIONS=463} [2020-10-09 14:16:39,823 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 179 predicate places. [2020-10-09 14:16:39,824 INFO L481 AbstractCegarLoop]: Abstraction has has 236 places, 463 transitions, 4606 flow [2020-10-09 14:16:39,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 14:16:39,824 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:39,824 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-09 14:16:40,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:40,448 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:16:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 103784628, now seen corresponding path program 1 times [2020-10-09 14:16:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:40,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963231417] [2020-10-09 14:16:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:40,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:40,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:40,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:40,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:40,767 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:40,793 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:40,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:40,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:40,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:44,121 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 34 [2020-10-09 14:16:44,259 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,412 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-09 14:16:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:48,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963231417] [2020-10-09 14:16:48,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339520450] [2020-10-09 14:16:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:48,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:48,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:48,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:48,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:48,640 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,643 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,648 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,652 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:48,655 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,331 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:49,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93544348] [2020-10-09 14:16:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 14:16:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:49,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:49,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:16:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:16:49,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:49,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,542 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,544 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,547 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:49,554 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:16:55,767 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-09 14:16:56,044 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:17:04,296 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 14:17:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:17:04,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:17:04,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 23 [2020-10-09 14:17:04,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53533115] [2020-10-09 14:17:04,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:17:04,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:17:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:17:04,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=377, Unknown=7, NotChecked=0, Total=506 [2020-10-09 14:17:09,146 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:17:09,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 463 transitions, 4606 flow. Second operand 23 states. [2020-10-09 14:17:09,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:17:09,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:17:09,147 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:17:42,172 WARN L193 SmtUtils]: Spent 31.51 s on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2020-10-09 14:18:08,148 WARN L193 SmtUtils]: Spent 25.64 s on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-09 14:18:11,748 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-09 14:18:12,286 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-09 14:18:20,391 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-09 14:18:52,474 WARN L193 SmtUtils]: Spent 12.65 s on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-09 14:19:14,328 WARN L193 SmtUtils]: Spent 16.46 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-09 14:20:10,025 WARN L193 SmtUtils]: Spent 26.57 s on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-09 14:20:32,863 WARN L193 SmtUtils]: Spent 14.00 s on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-09 14:20:45,607 WARN L193 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-09 14:21:11,156 WARN L193 SmtUtils]: Spent 14.24 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-09 14:21:26,743 WARN L193 SmtUtils]: Spent 15.15 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-09 14:21:35,309 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-09 14:21:35,783 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-09 14:22:08,872 WARN L193 SmtUtils]: Spent 29.07 s on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-09 14:22:23,106 WARN L193 SmtUtils]: Spent 12.83 s on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-09 14:22:36,047 WARN L193 SmtUtils]: Spent 12.31 s on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-09 14:22:53,897 WARN L193 SmtUtils]: Spent 13.15 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-09 14:23:55,561 WARN L193 SmtUtils]: Spent 34.70 s on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-09 14:24:08,748 WARN L193 SmtUtils]: Spent 12.86 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-09 14:24:21,386 WARN L193 SmtUtils]: Spent 12.26 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-09 14:24:21,964 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-09 14:24:54,648 WARN L193 SmtUtils]: Spent 14.43 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-09 14:24:55,416 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-10-09 14:24:55,670 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-10-09 14:25:12,962 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-09 14:25:13,688 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-10-09 14:25:22,355 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-09 14:25:28,716 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 58 [2020-10-09 14:25:30,038 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-09 14:25:30,687 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-10-09 14:25:31,069 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-09 14:25:32,035 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-09 14:25:32,500 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-10-09 14:25:32,792 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-10-09 14:25:33,034 INFO L129 PetriNetUnfolder]: 678/4292 cut-off events. [2020-10-09 14:25:33,035 INFO L130 PetriNetUnfolder]: For 63074/63216 co-relation queries the response was YES. [2020-10-09 14:25:33,087 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11979 conditions, 4292 events. 678/4292 cut-off events. For 63074/63216 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 42234 event pairs, 0 based on Foata normal form. 101/3937 useless extension candidates. Maximal degree in co-relation 11884. Up to 686 conditions per place. [2020-10-09 14:25:33,114 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 40 selfloop transitions, 885 changer transitions 110/1071 dead transitions. [2020-10-09 14:25:33,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1071 transitions, 13858 flow [2020-10-09 14:25:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-09 14:25:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-09 14:25:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 4553 transitions. [2020-10-09 14:25:33,134 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8408125577100647 [2020-10-09 14:25:33,135 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 4553 transitions. [2020-10-09 14:25:33,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 4553 transitions. [2020-10-09 14:25:33,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:25:33,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 4553 transitions. [2020-10-09 14:25:33,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 96 states. [2020-10-09 14:25:33,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 96 states. [2020-10-09 14:25:33,170 INFO L81 ComplementDD]: Finished complementDD. Result 96 states. [2020-10-09 14:25:33,170 INFO L185 Difference]: Start difference. First operand has 236 places, 463 transitions, 4606 flow. Second operand 95 states and 4553 transitions. [2020-10-09 14:25:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1071 transitions, 13858 flow [2020-10-09 14:25:33,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1071 transitions, 13234 flow, removed 258 selfloop flow, removed 36 redundant places. [2020-10-09 14:25:33,465 INFO L241 Difference]: Finished difference. Result has 325 places, 957 transitions, 11240 flow [2020-10-09 14:25:33,466 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=11240, PETRI_PLACES=325, PETRI_TRANSITIONS=957} [2020-10-09 14:25:33,467 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 268 predicate places. [2020-10-09 14:25:33,467 INFO L481 AbstractCegarLoop]: Abstraction has has 325 places, 957 transitions, 11240 flow [2020-10-09 14:25:33,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:25:33,467 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:25:33,467 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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] [2020-10-09 14:25:34,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:25:34,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:25:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:25:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1357157523, now seen corresponding path program 2 times [2020-10-09 14:25:34,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:25:34,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216987376] [2020-10-09 14:25:34,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-10-09 14:25:34,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:25:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:25:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:25:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:25:34,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:34,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:25:35,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:35,667 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:35,802 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:35,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:36,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:36,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:36,542 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:44,909 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-09 14:25:44,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:45,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216987376] [2020-10-09 14:25:45,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734826785] [2020-10-09 14:25:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:25:45,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:25:45,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:25:45,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:25:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:25:45,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:45,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:45,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:25:45,724 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,728 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,731 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,734 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,737 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,739 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:45,741 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910399430] [2020-10-09 14:25:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:25:54,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:25:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:25:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:25:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:25:54,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:54,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:25:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:54,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:25:54,336 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,339 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,343 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,350 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:54,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:58,668 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:25:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:25:58,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:25:58,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 23 [2020-10-09 14:25:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837273154] [2020-10-09 14:25:58,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 14:25:58,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:25:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 14:25:58,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=384, Unknown=3, NotChecked=0, Total=506 [2020-10-09 14:25:59,763 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:25:59,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 957 transitions, 11240 flow. Second operand 23 states. [2020-10-09 14:25:59,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:25:59,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:25:59,764 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:26:01,707 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-09 14:26:12,951 WARN L193 SmtUtils]: Spent 10.46 s on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-09 14:26:15,838 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-09 14:26:16,090 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 15 [2020-10-09 14:26:17,965 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-09 14:26:24,789 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-09 14:26:25,126 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-09 14:26:29,802 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-09 14:26:32,266 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-09 14:26:38,604 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-09 14:26:41,920 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-09 14:26:44,597 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-09 14:26:44,903 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-09 14:26:45,161 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2020-10-09 14:26:46,285 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-09 14:26:46,656 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-10-09 14:26:47,255 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-09 14:26:53,803 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-10-09 14:26:54,247 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2020-10-09 14:26:56,658 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-10-09 14:26:56,915 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-10-09 14:27:05,662 WARN L193 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-09 14:27:10,497 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-10-09 14:27:11,073 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2020-10-09 14:27:15,435 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-09 14:27:34,235 WARN L193 SmtUtils]: Spent 5.95 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-09 14:27:40,540 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-10-09 14:27:42,035 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-10-09 14:27:42,481 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-10-09 14:27:56,357 WARN L193 SmtUtils]: Spent 13.51 s on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-09 14:28:08,537 WARN L193 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-09 14:28:22,467 WARN L193 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-09 14:28:23,380 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-09 14:28:28,106 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-09 14:28:32,405 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-10-09 14:28:46,324 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-09 14:28:46,829 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-09 14:28:53,207 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-09 14:29:05,808 WARN L193 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-10-09 14:29:10,083 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-09 14:29:12,156 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-10-09 14:29:21,954 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-09 14:29:22,756 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-10-09 14:29:26,744 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-10-09 14:29:32,770 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-09 14:29:33,997 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-10-09 14:29:34,665 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-09 14:29:35,210 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-09 14:29:35,502 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-10-09 14:29:36,150 INFO L129 PetriNetUnfolder]: 1226/8036 cut-off events. [2020-10-09 14:29:36,150 INFO L130 PetriNetUnfolder]: For 155461/155685 co-relation queries the response was YES. [2020-10-09 14:29:36,231 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23219 conditions, 8036 events. 1226/8036 cut-off events. For 155461/155685 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 91287 event pairs, 0 based on Foata normal form. 142/7321 useless extension candidates. Maximal degree in co-relation 23092. Up to 1022 conditions per place. [2020-10-09 14:29:36,267 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 217 selfloop transitions, 1662 changer transitions 116/2031 dead transitions. [2020-10-09 14:29:36,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 2031 transitions, 28794 flow [2020-10-09 14:29:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-09 14:29:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 14:29:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 5648 transitions. [2020-10-09 14:29:36,281 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.839726434730895 [2020-10-09 14:29:36,281 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 5648 transitions. [2020-10-09 14:29:36,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 5648 transitions. [2020-10-09 14:29:36,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:29:36,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 5648 transitions. [2020-10-09 14:29:36,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 119 states. [2020-10-09 14:29:36,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 119 states. [2020-10-09 14:29:36,299 INFO L81 ComplementDD]: Finished complementDD. Result 119 states. [2020-10-09 14:29:36,299 INFO L185 Difference]: Start difference. First operand has 325 places, 957 transitions, 11240 flow. Second operand 118 states and 5648 transitions. [2020-10-09 14:29:36,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 2031 transitions, 28794 flow [2020-10-09 14:29:36,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 2031 transitions, 28473 flow, removed 137 selfloop flow, removed 38 redundant places. [2020-10-09 14:29:36,953 INFO L241 Difference]: Finished difference. Result has 436 places, 1906 transitions, 25824 flow [2020-10-09 14:29:36,954 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=25824, PETRI_PLACES=436, PETRI_TRANSITIONS=1906} [2020-10-09 14:29:36,954 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 379 predicate places. [2020-10-09 14:29:36,955 INFO L481 AbstractCegarLoop]: Abstraction has has 436 places, 1906 transitions, 25824 flow [2020-10-09 14:29:36,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 14:29:36,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:29:36,955 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2020-10-09 14:29:37,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3 [2020-10-09 14:29:37,558 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:29:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:29:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1457082832, now seen corresponding path program 3 times [2020-10-09 14:29:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:29:37,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763111873] [2020-10-09 14:29:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-10-09 14:29:37,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:29:37,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:29:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:29:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:29:38,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:38,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:38,613 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2020-10-09 14:29:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:38,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:29:38,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,137 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,244 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,476 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,654 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:39,832 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,029 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763111873] [2020-10-09 14:29:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1046603801] [2020-10-09 14:29:40,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:29:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:29:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:29:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:29:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:29:40,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:40,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:29:40,465 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,476 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,479 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,482 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:40,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506457711] [2020-10-09 14:29:40,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:29:40,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 14:29:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:29:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:29:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:29:40,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:40,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:29:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:29:40,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,675 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,681 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,684 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,687 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,689 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,690 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,693 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:29:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:29:40,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:29:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 25 [2020-10-09 14:29:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260763292] [2020-10-09 14:29:40,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 14:29:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:29:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 14:29:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-09 14:29:45,646 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-09 14:29:45,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1906 transitions, 25824 flow. Second operand 25 states. [2020-10-09 14:29:45,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:29:45,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-09 14:29:45,647 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:29:46,607 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-09 14:29:47,272 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-09 14:29:49,278 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2020-10-09 14:29:49,534 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-10-09 14:29:51,330 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-10-09 14:29:51,628 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-09 14:29:51,877 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-09 14:29:52,191 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-10-09 14:29:53,173 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-09 14:29:53,440 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-10-09 14:29:53,883 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-10-09 14:29:54,188 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-10-09 14:29:54,863 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2020-10-09 14:29:55,668 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2020-10-09 14:29:56,041 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-09 14:29:56,514 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-10-09 14:29:56,911 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-10-09 14:29:57,702 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-10-09 14:29:57,991 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-10-09 14:29:58,785 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-09 14:29:59,106 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2020-10-09 14:29:59,643 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-10-09 14:30:00,285 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-10-09 14:30:00,819 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-10-09 14:30:02,014 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:30:02,304 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2020-10-09 14:30:02,879 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-10-09 14:30:03,697 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-09 14:30:03,976 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2020-10-09 14:30:04,324 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-10-09 14:30:04,607 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-09 14:30:05,768 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-10-09 14:30:07,506 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-10-09 14:30:07,870 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2020-10-09 14:30:08,348 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2020-10-09 14:30:10,455 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-10-09 14:30:12,033 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:30:12,414 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2020-10-09 14:30:12,774 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-10-09 14:30:13,185 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-10-09 14:30:13,508 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-10-09 14:30:13,902 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-10-09 14:30:14,705 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-09 14:30:15,022 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2020-10-09 14:30:17,004 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2020-10-09 14:30:17,994 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-10-09 14:30:18,607 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-10-09 14:30:19,002 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-09 14:30:19,310 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-09 14:30:19,770 INFO L129 PetriNetUnfolder]: 1893/12646 cut-off events. [2020-10-09 14:30:19,771 INFO L130 PetriNetUnfolder]: For 348155/348599 co-relation queries the response was YES. [2020-10-09 14:30:19,965 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40448 conditions, 12646 events. 1893/12646 cut-off events. For 348155/348599 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 156111 event pairs, 0 based on Foata normal form. 165/11455 useless extension candidates. Maximal degree in co-relation 40287. Up to 1912 conditions per place. [2020-10-09 14:30:20,027 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 712 selfloop transitions, 2289 changer transitions 135/3172 dead transitions. [2020-10-09 14:30:20,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 3172 transitions, 51650 flow [2020-10-09 14:30:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-10-09 14:30:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 14:30:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 5699 transitions. [2020-10-09 14:30:20,042 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8401887070617721 [2020-10-09 14:30:20,042 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 5699 transitions. [2020-10-09 14:30:20,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 5699 transitions. [2020-10-09 14:30:20,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:30:20,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 5699 transitions. [2020-10-09 14:30:20,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 120 states. [2020-10-09 14:30:20,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 120 states. [2020-10-09 14:30:20,228 INFO L81 ComplementDD]: Finished complementDD. Result 120 states. [2020-10-09 14:30:20,228 INFO L185 Difference]: Start difference. First operand has 436 places, 1906 transitions, 25824 flow. Second operand 119 states and 5699 transitions. [2020-10-09 14:30:20,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 3172 transitions, 51650 flow [2020-10-09 14:30:21,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 3172 transitions, 50953 flow, removed 241 selfloop flow, removed 57 redundant places. [2020-10-09 14:30:21,995 INFO L241 Difference]: Finished difference. Result has 541 places, 3001 transitions, 46740 flow [2020-10-09 14:30:21,998 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=25358, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=46740, PETRI_PLACES=541, PETRI_TRANSITIONS=3001} [2020-10-09 14:30:21,998 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 484 predicate places. [2020-10-09 14:30:21,998 INFO L481 AbstractCegarLoop]: Abstraction has has 541 places, 3001 transitions, 46740 flow [2020-10-09 14:30:21,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 14:30:21,998 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:21,999 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:30:22,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:30:22,616 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1842721706, now seen corresponding path program 4 times [2020-10-09 14:30:22,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:22,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9238534] [2020-10-09 14:30:22,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-10-09 14:30:22,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:30:22,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:30:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:30:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:23,536 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-09 14:30:33,490 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-09 14:30:33,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:33,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:30:33,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:30:33,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:30:33,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:35,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:36,303 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:36,497 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:36,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:36,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:39,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:39,501 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-10-09 14:30:39,504 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:39,867 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2020-10-09 14:30:39,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:42,768 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-09 14:30:42,836 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:49,311 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 50 [2020-10-09 14:30:49,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9238534] [2020-10-09 14:30:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019473640] [2020-10-09 14:30:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:30:50,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:30:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:30:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:30:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:52,620 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_~i~0_129_38 Int) (v_~i~0_139 Int) (aux_div_v_~i~0_129_38 Int)) (and (< aux_mod_v_~i~0_129_38 2) (<= 0 aux_mod_v_~i~0_129_38) (<= (+ (* 2 aux_mod_v_~i~0_129_38) c_~j~0) (+ (* 2 v_~i~0_139) (* 4 aux_div_v_~i~0_129_38) 3)) (<= c_~i~0 (+ v_~i~0_139 c_~j~0)) (<= (+ (* 3 aux_mod_v_~i~0_129_38) v_~i~0_139) (+ (* 6 aux_div_v_~i~0_129_38) 4)) (<= aux_div_v_~i~0_129_38 1))) is different from true [2020-10-09 14:30:52,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:52,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:30:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:52,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:52,876 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,879 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,882 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,886 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:30:52,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts Received shutdown request... [2020-10-09 14:30:55,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3,18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:30:55,506 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 14:30:55,512 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 14:30:55,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:30:55 BasicIcfg [2020-10-09 14:30:55,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:30:55,514 INFO L168 Benchmark]: Toolchain (without parser) took 867079.27 ms. Allocated memory was 253.2 MB in the beginning and 1.1 GB in the end (delta: 825.2 MB). Free memory was 209.4 MB in the beginning and 635.2 MB in the end (delta: -425.8 MB). Peak memory consumption was 399.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:55,514 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:30:55,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 655.65 ms. Allocated memory was 253.2 MB in the beginning and 319.3 MB in the end (delta: 66.1 MB). Free memory was 209.4 MB in the beginning and 274.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:55,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 319.3 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:30:55,516 INFO L168 Benchmark]: Boogie Preprocessor took 26.60 ms. Allocated memory is still 319.3 MB. Free memory was 274.6 MB in the beginning and 272.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:55,516 INFO L168 Benchmark]: RCFGBuilder took 391.65 ms. Allocated memory is still 319.3 MB. Free memory was 272.1 MB in the beginning and 250.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:55,516 INFO L168 Benchmark]: TraceAbstraction took 865955.59 ms. Allocated memory was 319.3 MB in the beginning and 1.1 GB in the end (delta: 759.2 MB). Free memory was 250.3 MB in the beginning and 635.2 MB in the end (delta: -384.9 MB). Peak memory consumption was 374.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:55,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 655.65 ms. Allocated memory was 253.2 MB in the beginning and 319.3 MB in the end (delta: 66.1 MB). Free memory was 209.4 MB in the beginning and 274.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 319.3 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.60 ms. Allocated memory is still 319.3 MB. Free memory was 274.6 MB in the beginning and 272.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 391.65 ms. Allocated memory is still 319.3 MB. Free memory was 272.1 MB in the beginning and 250.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 865955.59 ms. Allocated memory was 319.3 MB in the beginning and 1.1 GB in the end (delta: 759.2 MB). Free memory was 250.3 MB in the beginning and 635.2 MB in the end (delta: -384.9 MB). Peak memory consumption was 374.3 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while CegarLoopForPetriNet was analyzing trace of length 63 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: TIMEOUT, OverallTime: 865.8s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 776.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 696 SDslu, 457 SDs, 0 SdLazy, 2792 SolverSat, 961 SolverUnsat, 72 SolverUnknown, 0 SolverNotchecked, 165.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1853 GetRequests, 1307 SyntacticMatches, 9 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18948 ImplicationChecksByTransitivity, 631.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46740occurred in iteration=7, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 52.6s InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1420 ConstructedInterpolants, 102 QuantifiedInterpolants, 1058714 SizeOfPredicates, 60 NumberOfNonLiveVariables, 1676 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 0/714 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