/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 01:31:50,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 01:31:50,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 01:31:50,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 01:31:50,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 01:31:50,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 01:31:50,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 01:31:50,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 01:31:50,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 01:31:50,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 01:31:50,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 01:31:50,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 01:31:50,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 01:31:50,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 01:31:50,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 01:31:50,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 01:31:50,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 01:31:50,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 01:31:50,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 01:31:50,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 01:31:50,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 01:31:50,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 01:31:50,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 01:31:50,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 01:31:50,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 01:31:50,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 01:31:50,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 01:31:50,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 01:31:50,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 01:31:50,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 01:31:50,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 01:31:50,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 01:31:50,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 01:31:50,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 01:31:50,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 01:31:50,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 01:31:50,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 01:31:50,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 01:31:50,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 01:31:50,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 01:31:50,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 01:31:50,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-01-19 01:31:50,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 01:31:50,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 01:31:50,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 01:31:50,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 01:31:50,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 01:31:50,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 01:31:50,421 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 01:31:50,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 01:31:50,422 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 01:31:50,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 01:31:50,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 01:31:50,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 01:31:50,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 01:31:50,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 01:31:50,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 01:31:50,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 01:31:50,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:31:50,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 01:31:50,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 01:31:50,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 01:31:50,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 01:31:50,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 01:31:50,430 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 01:31:50,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 01:31:50,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 01:31:50,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 01:31:50,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 01:31:50,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 01:31:50,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 01:31:50,636 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 01:31:50,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-01-19 01:31:50,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2c9dbc9/ac7a3f7e09ad474482a86dd53ef4f6e8/FLAGa7aa40c3b [2022-01-19 01:31:51,093 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 01:31:51,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-01-19 01:31:51,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2c9dbc9/ac7a3f7e09ad474482a86dd53ef4f6e8/FLAGa7aa40c3b [2022-01-19 01:31:51,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2c9dbc9/ac7a3f7e09ad474482a86dd53ef4f6e8 [2022-01-19 01:31:51,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 01:31:51,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 01:31:51,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 01:31:51,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 01:31:51,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 01:31:51,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258b5256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51, skipping insertion in model container [2022-01-19 01:31:51,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 01:31:51,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 01:31:51,355 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-01-19 01:31:51,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:31:51,364 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 01:31:51,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-01-19 01:31:51,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 01:31:51,393 INFO L208 MainTranslator]: Completed translation [2022-01-19 01:31:51,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51 WrapperNode [2022-01-19 01:31:51,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 01:31:51,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 01:31:51,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 01:31:51,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 01:31:51,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,421 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-01-19 01:31:51,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 01:31:51,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 01:31:51,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 01:31:51,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 01:31:51,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 01:31:51,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 01:31:51,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 01:31:51,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 01:31:51,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (1/1) ... [2022-01-19 01:31:51,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 01:31:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:31:51,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 01:31:51,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 01:31:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 01:31:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 01:31:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 01:31:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 01:31:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 01:31:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 01:31:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 01:31:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 01:31:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 01:31:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 01:31:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 01:31:51,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 01:31:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 01:31:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 01:31:51,534 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 01:31:51,600 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 01:31:51,601 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 01:31:51,776 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 01:31:51,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 01:31:51,818 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 01:31:51,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:31:51 BoogieIcfgContainer [2022-01-19 01:31:51,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 01:31:51,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 01:31:51,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 01:31:51,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 01:31:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 01:31:51" (1/3) ... [2022-01-19 01:31:51,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b1f0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:31:51, skipping insertion in model container [2022-01-19 01:31:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 01:31:51" (2/3) ... [2022-01-19 01:31:51,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b1f0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 01:31:51, skipping insertion in model container [2022-01-19 01:31:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 01:31:51" (3/3) ... [2022-01-19 01:31:51,831 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-01-19 01:31:51,836 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 01:31:51,836 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 01:31:51,836 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 01:31:51,874 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,874 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,875 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,875 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,875 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,877 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,878 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,878 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,878 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,879 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,879 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,880 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,880 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,880 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,880 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,882 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,882 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,886 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,887 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 01:31:51,891 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 01:31:51,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 01:31:51,932 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 01:31:51,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 01:31:51,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-01-19 01:31:51,979 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2022-01-19 01:31:51,980 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:31:51,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-01-19 01:31:51,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-01-19 01:31:51,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-01-19 01:31:52,004 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-01-19 01:31:52,005 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 01:31:52,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:52,005 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:52,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2022-01-19 01:31:52,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:52,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103434397] [2022-01-19 01:31:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:52,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:52,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103434397] [2022-01-19 01:31:52,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103434397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:31:52,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:31:52,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 01:31:52,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647426456] [2022-01-19 01:31:52,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:52,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 01:31:52,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 01:31:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 01:31:52,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-01-19 01:31:52,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:52,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-01-19 01:31:52,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:31:52,396 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2022-01-19 01:31:52,396 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-01-19 01:31:52,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-01-19 01:31:52,398 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-01-19 01:31:52,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-01-19 01:31:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 01:31:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 01:31:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-01-19 01:31:52,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-01-19 01:31:52,423 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-01-19 01:31:52,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-01-19 01:31:52,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:31:52,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-01-19 01:31:52,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,437 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,439 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-01-19 01:31:52,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-01-19 01:31:52,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 01:31:52,449 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-01-19 01:31:52,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-01-19 01:31:52,456 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-01-19 01:31:52,456 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-01-19 01:31:52,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:52,457 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:52,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 01:31:52,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2022-01-19 01:31:52,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:52,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000414204] [2022-01-19 01:31:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:52,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:52,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000414204] [2022-01-19 01:31:52,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000414204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:31:52,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:31:52,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 01:31:52,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463970236] [2022-01-19 01:31:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:52,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 01:31:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 01:31:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 01:31:52,706 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-01-19 01:31:52,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:52,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-01-19 01:31:52,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:31:52,847 INFO L129 PetriNetUnfolder]: 40/148 cut-off events. [2022-01-19 01:31:52,847 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-01-19 01:31:52,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 148 events. 40/148 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 369 event pairs, 2 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 243. Up to 53 conditions per place. [2022-01-19 01:31:52,849 INFO L132 encePairwiseOnDemand]: 82/88 looper letters, 30 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2022-01-19 01:31:52,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 240 flow [2022-01-19 01:31:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 01:31:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 01:31:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-01-19 01:31:52,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-01-19 01:31:52,852 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-01-19 01:31:52,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-01-19 01:31:52,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:31:52,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-01-19 01:31:52,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,856 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 6 states and 378 transitions. [2022-01-19 01:31:52,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 240 flow [2022-01-19 01:31:52,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 01:31:52,859 INFO L242 Difference]: Finished difference. Result has 79 places, 72 transitions, 164 flow [2022-01-19 01:31:52,859 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2022-01-19 01:31:52,859 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2022-01-19 01:31:52,860 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 164 flow [2022-01-19 01:31:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:52,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:52,860 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:52,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 01:31:52,860 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1648014554, now seen corresponding path program 1 times [2022-01-19 01:31:52,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:52,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916545669] [2022-01-19 01:31:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:52,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:53,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916545669] [2022-01-19 01:31:53,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916545669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:31:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588324281] [2022-01-19 01:31:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:53,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:31:53,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:31:53,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:31:53,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 01:31:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 01:31:53,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:31:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 01:31:53,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 01:31:53,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588324281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:31:53,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 01:31:53,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 01:31:53,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893231996] [2022-01-19 01:31:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:53,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 01:31:53,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 01:31:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-19 01:31:53,649 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2022-01-19 01:31:53,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:53,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:53,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2022-01-19 01:31:53,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:31:53,910 INFO L129 PetriNetUnfolder]: 46/175 cut-off events. [2022-01-19 01:31:53,910 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-01-19 01:31:53,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 175 events. 46/175 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 448 event pairs, 4 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 327. Up to 64 conditions per place. [2022-01-19 01:31:53,912 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 34 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2022-01-19 01:31:53,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 287 flow [2022-01-19 01:31:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 01:31:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 01:31:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 421 transitions. [2022-01-19 01:31:53,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6834415584415584 [2022-01-19 01:31:53,920 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 421 transitions. [2022-01-19 01:31:53,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 421 transitions. [2022-01-19 01:31:53,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:31:53,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 421 transitions. [2022-01-19 01:31:53,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.142857142857146) internal successors, (421), 7 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:53,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:53,927 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:53,927 INFO L186 Difference]: Start difference. First operand has 79 places, 72 transitions, 164 flow. Second operand 7 states and 421 transitions. [2022-01-19 01:31:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 287 flow [2022-01-19 01:31:53,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 01:31:53,932 INFO L242 Difference]: Finished difference. Result has 84 places, 77 transitions, 207 flow [2022-01-19 01:31:53,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-01-19 01:31:53,933 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2022-01-19 01:31:53,933 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 207 flow [2022-01-19 01:31:53,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:53,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:53,934 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:53,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 01:31:54,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:31:54,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1055812012, now seen corresponding path program 2 times [2022-01-19 01:31:54,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:54,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388648209] [2022-01-19 01:31:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:54,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:54,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:54,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388648209] [2022-01-19 01:31:54,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388648209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:31:54,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:31:54,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 01:31:54,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502328863] [2022-01-19 01:31:54,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:54,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 01:31:54,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 01:31:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 01:31:54,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 88 [2022-01-19 01:31:54,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:54,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:54,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 88 [2022-01-19 01:31:54,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:31:54,569 INFO L129 PetriNetUnfolder]: 119/358 cut-off events. [2022-01-19 01:31:54,570 INFO L130 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-01-19 01:31:54,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 358 events. 119/358 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1397 event pairs, 6 based on Foata normal form. 6/358 useless extension candidates. Maximal degree in co-relation 825. Up to 74 conditions per place. [2022-01-19 01:31:54,573 INFO L132 encePairwiseOnDemand]: 78/88 looper letters, 46 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2022-01-19 01:31:54,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 543 flow [2022-01-19 01:31:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 01:31:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 01:31:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 487 transitions. [2022-01-19 01:31:54,580 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7905844155844156 [2022-01-19 01:31:54,580 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 487 transitions. [2022-01-19 01:31:54,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 487 transitions. [2022-01-19 01:31:54,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:31:54,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 487 transitions. [2022-01-19 01:31:54,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:54,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:54,584 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:54,584 INFO L186 Difference]: Start difference. First operand has 84 places, 77 transitions, 207 flow. Second operand 7 states and 487 transitions. [2022-01-19 01:31:54,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 543 flow [2022-01-19 01:31:54,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-01-19 01:31:54,588 INFO L242 Difference]: Finished difference. Result has 92 places, 100 transitions, 433 flow [2022-01-19 01:31:54,589 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2022-01-19 01:31:54,589 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2022-01-19 01:31:54,589 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 433 flow [2022-01-19 01:31:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:54,590 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:54,590 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:54,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 01:31:54,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash 84182980, now seen corresponding path program 3 times [2022-01-19 01:31:54,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:54,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387942067] [2022-01-19 01:31:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:54,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:54,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:54,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387942067] [2022-01-19 01:31:54,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387942067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:31:54,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230230828] [2022-01-19 01:31:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:31:54,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:31:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:31:54,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:31:54,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 01:31:54,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 01:31:54,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:31:54,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 01:31:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:31:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:55,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 01:31:55,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230230828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:31:55,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 01:31:55,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-01-19 01:31:55,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390510117] [2022-01-19 01:31:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:55,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 01:31:55,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 01:31:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-19 01:31:55,145 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 88 [2022-01-19 01:31:55,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:55,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:55,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 88 [2022-01-19 01:31:55,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:31:55,428 INFO L129 PetriNetUnfolder]: 170/477 cut-off events. [2022-01-19 01:31:55,428 INFO L130 PetriNetUnfolder]: For 723/723 co-relation queries the response was YES. [2022-01-19 01:31:55,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 477 events. 170/477 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2176 event pairs, 35 based on Foata normal form. 6/474 useless extension candidates. Maximal degree in co-relation 1596. Up to 189 conditions per place. [2022-01-19 01:31:55,433 INFO L132 encePairwiseOnDemand]: 77/88 looper letters, 86 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2022-01-19 01:31:55,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1024 flow [2022-01-19 01:31:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 01:31:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 01:31:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 642 transitions. [2022-01-19 01:31:55,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6632231404958677 [2022-01-19 01:31:55,436 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 642 transitions. [2022-01-19 01:31:55,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 642 transitions. [2022-01-19 01:31:55,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:31:55,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 642 transitions. [2022-01-19 01:31:55,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:55,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 88.0) internal successors, (1056), 12 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:55,440 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 88.0) internal successors, (1056), 12 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:55,440 INFO L186 Difference]: Start difference. First operand has 92 places, 100 transitions, 433 flow. Second operand 11 states and 642 transitions. [2022-01-19 01:31:55,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1024 flow [2022-01-19 01:31:55,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1012 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 01:31:55,448 INFO L242 Difference]: Finished difference. Result has 104 places, 115 transitions, 628 flow [2022-01-19 01:31:55,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=628, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2022-01-19 01:31:55,449 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 26 predicate places. [2022-01-19 01:31:55,449 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 628 flow [2022-01-19 01:31:55,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:55,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:31:55,450 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:31:55,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 01:31:55,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:31:55,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:31:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:31:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1459907376, now seen corresponding path program 4 times [2022-01-19 01:31:55,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:31:55,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366328948] [2022-01-19 01:31:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:31:55,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:31:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:31:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:56,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:31:56,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366328948] [2022-01-19 01:31:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366328948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:31:56,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203293503] [2022-01-19 01:31:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:31:56,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:31:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:31:56,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:31:56,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 01:31:56,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:31:56,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:31:56,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 01:31:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:31:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:31:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:31:58,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203293503] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 01:31:58,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 01:31:58,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-01-19 01:31:58,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008379626] [2022-01-19 01:31:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:31:58,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-19 01:31:58,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:31:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-19 01:31:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-01-19 01:31:58,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:31:58,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 628 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:31:58,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:31:58,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:31:58,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:32:02,082 INFO L129 PetriNetUnfolder]: 430/1265 cut-off events. [2022-01-19 01:32:02,082 INFO L130 PetriNetUnfolder]: For 2658/2658 co-relation queries the response was YES. [2022-01-19 01:32:02,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 1265 events. 430/1265 cut-off events. For 2658/2658 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8550 event pairs, 34 based on Foata normal form. 3/1256 useless extension candidates. Maximal degree in co-relation 4378. Up to 305 conditions per place. [2022-01-19 01:32:02,093 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 156 selfloop transitions, 122 changer transitions 19/336 dead transitions. [2022-01-19 01:32:02,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 336 transitions, 2835 flow [2022-01-19 01:32:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 01:32:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 01:32:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1523 transitions. [2022-01-19 01:32:02,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6181006493506493 [2022-01-19 01:32:02,098 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1523 transitions. [2022-01-19 01:32:02,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1523 transitions. [2022-01-19 01:32:02,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:32:02,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1523 transitions. [2022-01-19 01:32:02,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.392857142857146) internal successors, (1523), 28 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,110 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,110 INFO L186 Difference]: Start difference. First operand has 104 places, 115 transitions, 628 flow. Second operand 28 states and 1523 transitions. [2022-01-19 01:32:02,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 336 transitions, 2835 flow [2022-01-19 01:32:02,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 336 transitions, 2783 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-01-19 01:32:02,126 INFO L242 Difference]: Finished difference. Result has 135 places, 217 transitions, 1772 flow [2022-01-19 01:32:02,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1772, PETRI_PLACES=135, PETRI_TRANSITIONS=217} [2022-01-19 01:32:02,129 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 57 predicate places. [2022-01-19 01:32:02,129 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 217 transitions, 1772 flow [2022-01-19 01:32:02,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:32:02,130 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:32:02,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 01:32:02,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:02,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:32:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:32:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 570045214, now seen corresponding path program 5 times [2022-01-19 01:32:02,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:32:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626050911] [2022-01-19 01:32:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:32:02,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:32:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:32:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:02,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:32:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626050911] [2022-01-19 01:32:02,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626050911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 01:32:02,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 01:32:02,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 01:32:02,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153027643] [2022-01-19 01:32:02,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 01:32:02,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 01:32:02,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:32:02,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 01:32:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 01:32:02,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 88 [2022-01-19 01:32:02,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 217 transitions, 1772 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:32:02,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 88 [2022-01-19 01:32:02,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:32:02,773 INFO L129 PetriNetUnfolder]: 558/1481 cut-off events. [2022-01-19 01:32:02,773 INFO L130 PetriNetUnfolder]: For 6978/6978 co-relation queries the response was YES. [2022-01-19 01:32:02,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6714 conditions, 1481 events. 558/1481 cut-off events. For 6978/6978 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9956 event pairs, 18 based on Foata normal form. 22/1491 useless extension candidates. Maximal degree in co-relation 6688. Up to 370 conditions per place. [2022-01-19 01:32:02,790 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 216 selfloop transitions, 109 changer transitions 0/374 dead transitions. [2022-01-19 01:32:02,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 374 transitions, 3973 flow [2022-01-19 01:32:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 01:32:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 01:32:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 478 transitions. [2022-01-19 01:32:02,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.775974025974026 [2022-01-19 01:32:02,793 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 478 transitions. [2022-01-19 01:32:02,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 478 transitions. [2022-01-19 01:32:02,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:32:02,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 478 transitions. [2022-01-19 01:32:02,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,796 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,796 INFO L186 Difference]: Start difference. First operand has 135 places, 217 transitions, 1772 flow. Second operand 7 states and 478 transitions. [2022-01-19 01:32:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 374 transitions, 3973 flow [2022-01-19 01:32:02,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 374 transitions, 3747 flow, removed 107 selfloop flow, removed 9 redundant places. [2022-01-19 01:32:02,863 INFO L242 Difference]: Finished difference. Result has 133 places, 275 transitions, 2762 flow [2022-01-19 01:32:02,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2762, PETRI_PLACES=133, PETRI_TRANSITIONS=275} [2022-01-19 01:32:02,864 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 55 predicate places. [2022-01-19 01:32:02,864 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 275 transitions, 2762 flow [2022-01-19 01:32:02,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:02,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:32:02,865 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:32:02,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 01:32:02,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:32:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:32:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2048782589, now seen corresponding path program 1 times [2022-01-19 01:32:02,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:32:02,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348193612] [2022-01-19 01:32:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:32:02,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:32:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:32:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:03,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:32:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348193612] [2022-01-19 01:32:03,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348193612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:32:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39448319] [2022-01-19 01:32:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:32:03,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:32:03,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:32:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 01:32:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:32:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-19 01:32:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:32:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:04,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:32:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39448319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:32:07,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:32:07,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 37 [2022-01-19 01:32:07,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479427981] [2022-01-19 01:32:07,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:32:07,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:32:07,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:32:07,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:32:07,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:32:07,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-01-19 01:32:07,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 275 transitions, 2762 flow. Second operand has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:07,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:32:07,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-01-19 01:32:07,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:32:19,019 INFO L129 PetriNetUnfolder]: 1399/3956 cut-off events. [2022-01-19 01:32:19,020 INFO L130 PetriNetUnfolder]: For 18666/18791 co-relation queries the response was YES. [2022-01-19 01:32:19,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18104 conditions, 3956 events. 1399/3956 cut-off events. For 18666/18791 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 34593 event pairs, 44 based on Foata normal form. 73/4026 useless extension candidates. Maximal degree in co-relation 18076. Up to 1095 conditions per place. [2022-01-19 01:32:19,063 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 399 selfloop transitions, 524 changer transitions 95/1068 dead transitions. [2022-01-19 01:32:19,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1068 transitions, 13702 flow [2022-01-19 01:32:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-19 01:32:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-01-19 01:32:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4941 transitions. [2022-01-19 01:32:19,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238636363636364 [2022-01-19 01:32:19,074 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4941 transitions. [2022-01-19 01:32:19,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4941 transitions. [2022-01-19 01:32:19,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:32:19,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4941 transitions. [2022-01-19 01:32:19,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 54.9) internal successors, (4941), 90 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:19,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:19,154 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:19,154 INFO L186 Difference]: Start difference. First operand has 133 places, 275 transitions, 2762 flow. Second operand 90 states and 4941 transitions. [2022-01-19 01:32:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1068 transitions, 13702 flow [2022-01-19 01:32:19,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1068 transitions, 13614 flow, removed 44 selfloop flow, removed 0 redundant places. [2022-01-19 01:32:19,272 INFO L242 Difference]: Finished difference. Result has 276 places, 694 transitions, 10269 flow [2022-01-19 01:32:19,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=10269, PETRI_PLACES=276, PETRI_TRANSITIONS=694} [2022-01-19 01:32:19,275 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 198 predicate places. [2022-01-19 01:32:19,276 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 694 transitions, 10269 flow [2022-01-19 01:32:19,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:19,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:32:19,277 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:32:19,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 01:32:19,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:19,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:32:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:32:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash 52711945, now seen corresponding path program 2 times [2022-01-19 01:32:19,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:32:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927738202] [2022-01-19 01:32:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:32:19,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:32:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:32:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:19,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:32:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927738202] [2022-01-19 01:32:19,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927738202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:32:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055533267] [2022-01-19 01:32:19,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:32:19,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:19,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:32:19,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:32:19,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 01:32:20,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:32:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:32:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-19 01:32:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:32:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:20,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:32:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:23,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055533267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:32:23,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:32:23,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2022-01-19 01:32:23,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690030842] [2022-01-19 01:32:23,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:32:23,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 01:32:23,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:32:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 01:32:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 01:32:23,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:32:23,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 694 transitions, 10269 flow. Second operand has 37 states, 37 states have (on average 51.054054054054056) internal successors, (1889), 37 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:23,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:32:23,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:32:23,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:32:44,750 INFO L129 PetriNetUnfolder]: 2162/5808 cut-off events. [2022-01-19 01:32:44,750 INFO L130 PetriNetUnfolder]: For 51404/51404 co-relation queries the response was YES. [2022-01-19 01:32:44,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33647 conditions, 5808 events. 2162/5808 cut-off events. For 51404/51404 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 53528 event pairs, 91 based on Foata normal form. 22/5816 useless extension candidates. Maximal degree in co-relation 33565. Up to 1572 conditions per place. [2022-01-19 01:32:44,832 INFO L132 encePairwiseOnDemand]: 68/88 looper letters, 755 selfloop transitions, 606 changer transitions 124/1524 dead transitions. [2022-01-19 01:32:44,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1524 transitions, 24587 flow [2022-01-19 01:32:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-19 01:32:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-01-19 01:32:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5685 transitions. [2022-01-19 01:32:44,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6037595581988106 [2022-01-19 01:32:44,842 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5685 transitions. [2022-01-19 01:32:44,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5685 transitions. [2022-01-19 01:32:44,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:32:44,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5685 transitions. [2022-01-19 01:32:44,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 53.13084112149533) internal successors, (5685), 107 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:44,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 88.0) internal successors, (9504), 108 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:44,865 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 88.0) internal successors, (9504), 108 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:44,865 INFO L186 Difference]: Start difference. First operand has 276 places, 694 transitions, 10269 flow. Second operand 107 states and 5685 transitions. [2022-01-19 01:32:44,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1524 transitions, 24587 flow [2022-01-19 01:32:45,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1524 transitions, 22813 flow, removed 873 selfloop flow, removed 34 redundant places. [2022-01-19 01:32:45,383 INFO L242 Difference]: Finished difference. Result has 377 places, 1017 transitions, 16771 flow [2022-01-19 01:32:45,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=9577, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=16771, PETRI_PLACES=377, PETRI_TRANSITIONS=1017} [2022-01-19 01:32:45,384 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 299 predicate places. [2022-01-19 01:32:45,385 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 1017 transitions, 16771 flow [2022-01-19 01:32:45,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.054054054054056) internal successors, (1889), 37 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:45,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:32:45,386 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:32:45,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 01:32:45,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:45,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:32:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:32:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1220155352, now seen corresponding path program 3 times [2022-01-19 01:32:45,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:32:45,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635699914] [2022-01-19 01:32:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:32:45,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:32:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:32:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:46,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:32:46,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635699914] [2022-01-19 01:32:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635699914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:32:46,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257585102] [2022-01-19 01:32:46,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 01:32:46,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:32:46,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:32:46,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:32:46,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 01:32:47,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 01:32:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:32:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-19 01:32:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:32:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:48,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:32:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:32:51,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257585102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:32:51,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:32:51,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 41 [2022-01-19 01:32:51,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468741412] [2022-01-19 01:32:51,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:32:51,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-19 01:32:51,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:32:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-19 01:32:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2022-01-19 01:32:51,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:32:51,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1017 transitions, 16771 flow. Second operand has 41 states, 41 states have (on average 51.1219512195122) internal successors, (2096), 41 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:32:51,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:32:51,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:32:51,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:33:02,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 01:33:21,646 INFO L129 PetriNetUnfolder]: 3562/9294 cut-off events. [2022-01-19 01:33:21,646 INFO L130 PetriNetUnfolder]: For 97770/97770 co-relation queries the response was YES. [2022-01-19 01:33:21,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59973 conditions, 9294 events. 3562/9294 cut-off events. For 97770/97770 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 90851 event pairs, 80 based on Foata normal form. 27/9304 useless extension candidates. Maximal degree in co-relation 59860. Up to 2682 conditions per place. [2022-01-19 01:33:21,786 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 1000 selfloop transitions, 1136 changer transitions 140/2315 dead transitions. [2022-01-19 01:33:21,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 2315 transitions, 40326 flow [2022-01-19 01:33:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-19 01:33:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-01-19 01:33:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 5828 transitions. [2022-01-19 01:33:21,794 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6132154882154882 [2022-01-19 01:33:21,794 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 5828 transitions. [2022-01-19 01:33:21,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 5828 transitions. [2022-01-19 01:33:21,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:33:21,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 5828 transitions. [2022-01-19 01:33:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 53.96296296296296) internal successors, (5828), 108 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:33:21,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 88.0) internal successors, (9592), 109 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:33:21,826 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 88.0) internal successors, (9592), 109 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:33:21,827 INFO L186 Difference]: Start difference. First operand has 377 places, 1017 transitions, 16771 flow. Second operand 108 states and 5828 transitions. [2022-01-19 01:33:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 2315 transitions, 40326 flow [2022-01-19 01:33:23,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2315 transitions, 37367 flow, removed 1088 selfloop flow, removed 55 redundant places. [2022-01-19 01:33:23,266 INFO L242 Difference]: Finished difference. Result has 452 places, 1650 transitions, 30114 flow [2022-01-19 01:33:23,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=15397, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=30114, PETRI_PLACES=452, PETRI_TRANSITIONS=1650} [2022-01-19 01:33:23,267 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 374 predicate places. [2022-01-19 01:33:23,267 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 1650 transitions, 30114 flow [2022-01-19 01:33:23,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.1219512195122) internal successors, (2096), 41 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:33:23,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:33:23,268 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:33:23,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 01:33:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:33:23,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:33:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:33:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1834682964, now seen corresponding path program 6 times [2022-01-19 01:33:23,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:33:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244991449] [2022-01-19 01:33:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:33:23,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:33:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:33:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:33:24,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:33:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244991449] [2022-01-19 01:33:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244991449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:33:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649674856] [2022-01-19 01:33:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:33:24,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:33:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:33:24,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:33:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 01:33:24,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 01:33:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:33:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-19 01:33:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:33:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:33:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:33:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:33:26,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649674856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:33:26,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:33:26,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 45 [2022-01-19 01:33:26,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132351886] [2022-01-19 01:33:26,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:33:26,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 01:33:26,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:33:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 01:33:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 01:33:26,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:33:26,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1650 transitions, 30114 flow. Second operand has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:33:26,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:33:26,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:33:26,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:34:04,228 INFO L129 PetriNetUnfolder]: 5029/12790 cut-off events. [2022-01-19 01:34:04,228 INFO L130 PetriNetUnfolder]: For 193051/193051 co-relation queries the response was YES. [2022-01-19 01:34:04,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97282 conditions, 12790 events. 5029/12790 cut-off events. For 193051/193051 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 129295 event pairs, 134 based on Foata normal form. 28/12802 useless extension candidates. Maximal degree in co-relation 97148. Up to 3867 conditions per place. [2022-01-19 01:34:04,682 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 998 selfloop transitions, 1957 changer transitions 105/3099 dead transitions. [2022-01-19 01:34:04,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 3099 transitions, 62716 flow [2022-01-19 01:34:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-19 01:34:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2022-01-19 01:34:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 6934 transitions. [2022-01-19 01:34:04,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5969352617079889 [2022-01-19 01:34:04,705 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 6934 transitions. [2022-01-19 01:34:04,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 6934 transitions. [2022-01-19 01:34:04,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:34:04,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 6934 transitions. [2022-01-19 01:34:04,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 52.53030303030303) internal successors, (6934), 132 states have internal predecessors, (6934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:34:04,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:34:04,767 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:34:04,768 INFO L186 Difference]: Start difference. First operand has 452 places, 1650 transitions, 30114 flow. Second operand 132 states and 6934 transitions. [2022-01-19 01:34:04,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 3099 transitions, 62716 flow [2022-01-19 01:34:08,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 3099 transitions, 58371 flow, removed 2039 selfloop flow, removed 62 redundant places. [2022-01-19 01:34:08,384 INFO L242 Difference]: Finished difference. Result has 551 places, 2608 transitions, 53649 flow [2022-01-19 01:34:08,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=28227, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=53649, PETRI_PLACES=551, PETRI_TRANSITIONS=2608} [2022-01-19 01:34:08,386 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 473 predicate places. [2022-01-19 01:34:08,386 INFO L470 AbstractCegarLoop]: Abstraction has has 551 places, 2608 transitions, 53649 flow [2022-01-19 01:34:08,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:34:08,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:34:08,387 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:34:08,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-19 01:34:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:34:08,603 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:34:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:34:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1756856783, now seen corresponding path program 4 times [2022-01-19 01:34:08,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:34:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750875505] [2022-01-19 01:34:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:34:08,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:34:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:34:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:34:10,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:34:10,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750875505] [2022-01-19 01:34:10,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750875505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:34:10,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313802150] [2022-01-19 01:34:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 01:34:10,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:34:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:34:10,003 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:34:10,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 01:34:10,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 01:34:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:34:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 01:34:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:34:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:34:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:34:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:34:25,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313802150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:34:25,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:34:25,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 42 [2022-01-19 01:34:25,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592475296] [2022-01-19 01:34:25,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:34:25,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-19 01:34:25,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:34:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-19 01:34:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1422, Unknown=2, NotChecked=0, Total=1722 [2022-01-19 01:34:25,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:34:25,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2608 transitions, 53649 flow. Second operand has 42 states, 42 states have (on average 51.26190476190476) internal successors, (2153), 42 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:34:25,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:34:25,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:34:25,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:34:45,606 WARN L228 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 156 DAG size of output: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 01:36:29,656 INFO L129 PetriNetUnfolder]: 7203/18158 cut-off events. [2022-01-19 01:36:29,657 INFO L130 PetriNetUnfolder]: For 487865/487865 co-relation queries the response was YES. [2022-01-19 01:36:29,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169834 conditions, 18158 events. 7203/18158 cut-off events. For 487865/487865 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 193452 event pairs, 131 based on Foata normal form. 36/18181 useless extension candidates. Maximal degree in co-relation 169675. Up to 5281 conditions per place. [2022-01-19 01:36:30,089 INFO L132 encePairwiseOnDemand]: 64/88 looper letters, 2830 selfloop transitions, 1897 changer transitions 157/4923 dead transitions. [2022-01-19 01:36:30,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 4923 transitions, 112894 flow [2022-01-19 01:36:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-19 01:36:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2022-01-19 01:36:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 7317 transitions. [2022-01-19 01:36:30,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6025197628458498 [2022-01-19 01:36:30,100 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 7317 transitions. [2022-01-19 01:36:30,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 7317 transitions. [2022-01-19 01:36:30,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:36:30,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 7317 transitions. [2022-01-19 01:36:30,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 53.02173913043478) internal successors, (7317), 138 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:36:30,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 88.0) internal successors, (12232), 139 states have internal predecessors, (12232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:36:30,128 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 88.0) internal successors, (12232), 139 states have internal predecessors, (12232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:36:30,128 INFO L186 Difference]: Start difference. First operand has 551 places, 2608 transitions, 53649 flow. Second operand 138 states and 7317 transitions. [2022-01-19 01:36:30,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 4923 transitions, 112894 flow [2022-01-19 01:36:40,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 4923 transitions, 107632 flow, removed 2546 selfloop flow, removed 38 redundant places. [2022-01-19 01:36:40,452 INFO L242 Difference]: Finished difference. Result has 703 places, 4020 transitions, 89949 flow [2022-01-19 01:36:40,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=50058, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=89949, PETRI_PLACES=703, PETRI_TRANSITIONS=4020} [2022-01-19 01:36:40,455 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 625 predicate places. [2022-01-19 01:36:40,455 INFO L470 AbstractCegarLoop]: Abstraction has has 703 places, 4020 transitions, 89949 flow [2022-01-19 01:36:40,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 51.26190476190476) internal successors, (2153), 42 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:36:40,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:36:40,455 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:36:40,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 01:36:40,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 01:36:40,656 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:36:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:36:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1334778211, now seen corresponding path program 5 times [2022-01-19 01:36:40,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:36:40,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696431183] [2022-01-19 01:36:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:36:40,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:36:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:36:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:36:43,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:36:43,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696431183] [2022-01-19 01:36:43,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696431183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:36:43,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699207979] [2022-01-19 01:36:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 01:36:43,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:36:43,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:36:43,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:36:43,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 01:36:44,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-19 01:36:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:36:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 01:36:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:36:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:36:45,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:36:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:36:56,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699207979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:36:56,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:36:56,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 49 [2022-01-19 01:36:56,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460934987] [2022-01-19 01:36:56,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:36:56,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-19 01:36:56,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:36:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-19 01:36:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2011, Unknown=1, NotChecked=0, Total=2352 [2022-01-19 01:36:56,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:36:56,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 4020 transitions, 89949 flow. Second operand has 49 states, 49 states have (on average 51.04081632653061) internal successors, (2501), 49 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:36:56,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:36:56,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:36:56,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:38:48,772 WARN L228 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 201 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 01:39:21,336 WARN L228 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 226 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 01:39:59,152 INFO L129 PetriNetUnfolder]: 8274/20720 cut-off events. [2022-01-19 01:39:59,152 INFO L130 PetriNetUnfolder]: For 602234/602234 co-relation queries the response was YES. [2022-01-19 01:39:59,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210393 conditions, 20720 events. 8274/20720 cut-off events. For 602234/602234 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 223805 event pairs, 61 based on Foata normal form. 38/20735 useless extension candidates. Maximal degree in co-relation 210182. Up to 7562 conditions per place. [2022-01-19 01:40:00,044 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 3107 selfloop transitions, 2244 changer transitions 188/5578 dead transitions. [2022-01-19 01:40:00,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 5578 transitions, 137784 flow [2022-01-19 01:40:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-19 01:40:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2022-01-19 01:40:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 6564 transitions. [2022-01-19 01:40:00,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6015395894428153 [2022-01-19 01:40:00,051 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 6564 transitions. [2022-01-19 01:40:00,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 6564 transitions. [2022-01-19 01:40:00,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:40:00,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 6564 transitions. [2022-01-19 01:40:00,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 52.935483870967744) internal successors, (6564), 124 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:40:00,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 88.0) internal successors, (11000), 125 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:40:00,072 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 88.0) internal successors, (11000), 125 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:40:00,072 INFO L186 Difference]: Start difference. First operand has 703 places, 4020 transitions, 89949 flow. Second operand 124 states and 6564 transitions. [2022-01-19 01:40:00,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 5578 transitions, 137784 flow [2022-01-19 01:40:19,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 5578 transitions, 126581 flow, removed 4786 selfloop flow, removed 62 redundant places. [2022-01-19 01:40:19,438 INFO L242 Difference]: Finished difference. Result has 788 places, 4700 transitions, 108704 flow [2022-01-19 01:40:19,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=83763, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=108704, PETRI_PLACES=788, PETRI_TRANSITIONS=4700} [2022-01-19 01:40:19,442 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 710 predicate places. [2022-01-19 01:40:19,442 INFO L470 AbstractCegarLoop]: Abstraction has has 788 places, 4700 transitions, 108704 flow [2022-01-19 01:40:19,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.04081632653061) internal successors, (2501), 49 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:40:19,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:40:19,443 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:40:19,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 01:40:19,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 01:40:19,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:40:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:40:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 824615955, now seen corresponding path program 6 times [2022-01-19 01:40:19,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:40:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532348592] [2022-01-19 01:40:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:40:19,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:40:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:40:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:40:20,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:40:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532348592] [2022-01-19 01:40:20,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532348592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:40:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298765407] [2022-01-19 01:40:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 01:40:20,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:40:20,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:40:20,888 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:40:20,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 01:40:21,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 01:40:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:40:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 01:40:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:40:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:40:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:40:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:40:29,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298765407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:40:29,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:40:29,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 19] total 44 [2022-01-19 01:40:29,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715153327] [2022-01-19 01:40:29,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:40:29,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-19 01:40:29,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:40:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-19 01:40:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-01-19 01:40:29,630 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:40:29,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 4700 transitions, 108704 flow. Second operand has 44 states, 44 states have (on average 51.20454545454545) internal successors, (2253), 44 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:40:29,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:40:29,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:40:29,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:42:17,642 INFO L129 PetriNetUnfolder]: 9533/23756 cut-off events. [2022-01-19 01:42:17,642 INFO L130 PetriNetUnfolder]: For 576883/576883 co-relation queries the response was YES. [2022-01-19 01:42:18,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227683 conditions, 23756 events. 9533/23756 cut-off events. For 576883/576883 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 262232 event pairs, 72 based on Foata normal form. 37/23773 useless extension candidates. Maximal degree in co-relation 227460. Up to 8246 conditions per place. [2022-01-19 01:42:18,995 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 3471 selfloop transitions, 2730 changer transitions 202/6442 dead transitions. [2022-01-19 01:42:18,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 6442 transitions, 159592 flow [2022-01-19 01:42:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-19 01:42:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2022-01-19 01:42:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 7594 transitions. [2022-01-19 01:42:19,003 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.59927398989899 [2022-01-19 01:42:19,003 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 7594 transitions. [2022-01-19 01:42:19,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 7594 transitions. [2022-01-19 01:42:19,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:42:19,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 7594 transitions. [2022-01-19 01:42:19,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 52.736111111111114) internal successors, (7594), 144 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:19,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 88.0) internal successors, (12760), 145 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:19,024 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 88.0) internal successors, (12760), 145 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:19,025 INFO L186 Difference]: Start difference. First operand has 788 places, 4700 transitions, 108704 flow. Second operand 144 states and 7594 transitions. [2022-01-19 01:42:19,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 6442 transitions, 159592 flow [2022-01-19 01:42:40,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 6442 transitions, 155994 flow, removed 1669 selfloop flow, removed 58 redundant places. [2022-01-19 01:42:40,735 INFO L242 Difference]: Finished difference. Result has 899 places, 5561 transitions, 138111 flow [2022-01-19 01:42:40,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=106449, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=138111, PETRI_PLACES=899, PETRI_TRANSITIONS=5561} [2022-01-19 01:42:40,739 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 821 predicate places. [2022-01-19 01:42:40,739 INFO L470 AbstractCegarLoop]: Abstraction has has 899 places, 5561 transitions, 138111 flow [2022-01-19 01:42:40,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 51.20454545454545) internal successors, (2253), 44 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:40,739 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:42:40,739 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:42:40,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-19 01:42:40,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 01:42:40,940 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:42:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:42:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 139532605, now seen corresponding path program 7 times [2022-01-19 01:42:40,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:42:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207577089] [2022-01-19 01:42:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:42:40,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:42:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:42:42,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:42:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207577089] [2022-01-19 01:42:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207577089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:42:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242880388] [2022-01-19 01:42:42,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 01:42:42,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:42:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:42:42,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:42:42,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 01:42:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:42:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 01:42:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:42:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:42:44,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:42:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:42:50,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242880388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:42:50,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:42:50,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 38 [2022-01-19 01:42:50,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723669734] [2022-01-19 01:42:50,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:42:50,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 01:42:50,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:42:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 01:42:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 01:42:50,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:42:50,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 5561 transitions, 138111 flow. Second operand has 38 states, 38 states have (on average 51.44736842105263) internal successors, (1955), 38 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:42:50,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:42:50,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:42:50,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:44:18,310 INFO L129 PetriNetUnfolder]: 10645/26362 cut-off events. [2022-01-19 01:44:18,310 INFO L130 PetriNetUnfolder]: For 758771/758771 co-relation queries the response was YES. [2022-01-19 01:44:20,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271286 conditions, 26362 events. 10645/26362 cut-off events. For 758771/758771 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 295099 event pairs, 168 based on Foata normal form. 24/26349 useless extension candidates. Maximal degree in co-relation 271036. Up to 9356 conditions per place. [2022-01-19 01:44:20,227 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 3715 selfloop transitions, 3143 changer transitions 119/7016 dead transitions. [2022-01-19 01:44:20,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 941 places, 7016 transitions, 186264 flow [2022-01-19 01:44:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 01:44:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 01:44:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4684 transitions. [2022-01-19 01:44:20,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6048553719008265 [2022-01-19 01:44:20,231 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4684 transitions. [2022-01-19 01:44:20,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4684 transitions. [2022-01-19 01:44:20,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 01:44:20,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4684 transitions. [2022-01-19 01:44:20,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.22727272727273) internal successors, (4684), 88 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:20,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:20,244 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:20,244 INFO L186 Difference]: Start difference. First operand has 899 places, 5561 transitions, 138111 flow. Second operand 88 states and 4684 transitions. [2022-01-19 01:44:20,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 941 places, 7016 transitions, 186264 flow [2022-01-19 01:44:52,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 7016 transitions, 183018 flow, removed 1370 selfloop flow, removed 71 redundant places. [2022-01-19 01:44:52,817 INFO L242 Difference]: Finished difference. Result has 914 places, 6290 transitions, 168048 flow [2022-01-19 01:44:52,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=135789, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=168048, PETRI_PLACES=914, PETRI_TRANSITIONS=6290} [2022-01-19 01:44:52,823 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 836 predicate places. [2022-01-19 01:44:52,823 INFO L470 AbstractCegarLoop]: Abstraction has has 914 places, 6290 transitions, 168048 flow [2022-01-19 01:44:52,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 51.44736842105263) internal successors, (1955), 38 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:44:52,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 01:44:52,823 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 01:44:52,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 01:44:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 01:44:53,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 01:44:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 01:44:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1155507683, now seen corresponding path program 8 times [2022-01-19 01:44:53,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 01:44:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573498931] [2022-01-19 01:44:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 01:44:53,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 01:44:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 01:44:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:44:54,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 01:44:54,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573498931] [2022-01-19 01:44:54,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573498931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 01:44:54,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847041050] [2022-01-19 01:44:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 01:44:54,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 01:44:54,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 01:44:54,384 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 01:44:54,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 01:44:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 01:44:54,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 01:44:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 01:44:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 01:44:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:44:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 01:45:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 01:45:07,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847041050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 01:45:07,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 01:45:07,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 19] total 39 [2022-01-19 01:45:07,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129269018] [2022-01-19 01:45:07,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 01:45:07,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 01:45:07,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 01:45:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 01:45:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 01:45:07,607 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 01:45:07,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 6290 transitions, 168048 flow. Second operand has 39 states, 39 states have (on average 51.43589743589744) internal successors, (2006), 39 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 01:45:07,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 01:45:07,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 01:45:07,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 01:45:35,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 01:45:40,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2022-01-19 01:45:41,251 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 01:45:41,287 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 01:45:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 01:45:41,590 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 01:45:41,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 01:45:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 01:45:41,795 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 49/88 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 20184 conditions, 1763 events (637/1762 cut-off events. For 69456/69456 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 16665 event pairs, 23 based on Foata normal form. 0/2180 useless extension candidates. Maximal degree in co-relation 19925. Up to 455 conditions per place.). [2022-01-19 01:45:41,816 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 01:45:41,816 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 01:45:41,820 INFO L732 BasicCegarLoop]: Path program histogram: [8, 6, 1, 1] [2022-01-19 01:45:41,824 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 01:45:41,824 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 01:45:41,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 01:45:41 BasicIcfg [2022-01-19 01:45:41,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 01:45:41,844 INFO L158 Benchmark]: Toolchain (without parser) took 830713.15ms. Allocated memory was 379.6MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 325.0MB in the beginning and 815.4MB in the end (delta: -490.4MB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2022-01-19 01:45:41,844 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 379.6MB. Free memory is still 342.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:45:41,844 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.79ms. Allocated memory is still 379.6MB. Free memory was 324.8MB in the beginning and 351.1MB in the end (delta: -26.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.0GB. [2022-01-19 01:45:41,845 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.23ms. Allocated memory is still 379.6MB. Free memory was 351.1MB in the beginning and 349.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:45:41,845 INFO L158 Benchmark]: Boogie Preprocessor took 18.60ms. Allocated memory is still 379.6MB. Free memory was 349.7MB in the beginning and 348.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 01:45:41,845 INFO L158 Benchmark]: RCFGBuilder took 383.16ms. Allocated memory is still 379.6MB. Free memory was 348.3MB in the beginning and 335.0MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 01:45:41,845 INFO L158 Benchmark]: TraceAbstraction took 830017.50ms. Allocated memory was 379.6MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 334.3MB in the beginning and 815.4MB in the end (delta: -481.1MB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2022-01-19 01:45:41,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 379.6MB. Free memory is still 342.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 261.79ms. Allocated memory is still 379.6MB. Free memory was 324.8MB in the beginning and 351.1MB in the end (delta: -26.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.23ms. Allocated memory is still 379.6MB. Free memory was 351.1MB in the beginning and 349.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 18.60ms. Allocated memory is still 379.6MB. Free memory was 349.7MB in the beginning and 348.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 383.16ms. Allocated memory is still 379.6MB. Free memory was 348.3MB in the beginning and 335.0MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 830017.50ms. Allocated memory was 379.6MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 334.3MB in the beginning and 815.4MB in the end (delta: -481.1MB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 49/88 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 20184 conditions, 1763 events (637/1762 cut-off events. For 69456/69456 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 16665 event pairs, 23 based on Foata normal form. 0/2180 useless extension candidates. Maximal degree in co-relation 19925. Up to 455 conditions per place.). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 49/88 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 20184 conditions, 1763 events (637/1762 cut-off events. For 69456/69456 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 16665 event pairs, 23 based on Foata normal form. 0/2180 useless extension candidates. Maximal degree in co-relation 19925. Up to 455 conditions per place.). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 49/88 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 20184 conditions, 1763 events (637/1762 cut-off events. For 69456/69456 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 16665 event pairs, 23 based on Foata normal form. 0/2180 useless extension candidates. Maximal degree in co-relation 19925. Up to 455 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 100 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 829.9s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 738.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6364 SdHoareTripleChecker+Valid, 78.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6364 mSDsluCounter, 4567 SdHoareTripleChecker+Invalid, 74.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 241 IncrementalHoareTripleChecker+Unchecked, 6280 mSDsCounter, 1920 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18473 IncrementalHoareTripleChecker+Invalid, 20634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1920 mSolverCounterUnsat, 362 mSDtfsCounter, 18473 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2665 GetRequests, 1376 SyntacticMatches, 32 SemanticMatches, 1257 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 54588 ImplicationChecksByTransitivity, 486.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168048occurred in iteration=15, InterpolantAutomatonStates: 999, 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: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 85.9s InterpolantComputationTime, 2028 NumberOfCodeBlocks, 2028 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2736 ConstructedInterpolants, 29 QuantifiedInterpolants, 69827 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1989 ConjunctsInSsa, 321 ConjunctsInUnsatCore, 38 InterpolantComputations, 7 PerfectInterpolantSequences, 8/282 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